JP3395128B2 - Spray type surface treatment method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spray-type surface treatment method, and more specifically, by controlling the order of spraying aggregate and binder, and controlling the particle size of the aggregate and / or the viscosity of the binder, The present invention relates to a spray-type surface treatment method capable of constructing a strong surface treatment layer having excellent durability and stability.

[0002]

2. Description of the Related Art Road pavement is
Aging and deterioration gradually occur, and the road surface may be worn to form irregularities, or cracks and the like may occur on the pavement surface. If the irregularities or cracks are left untreated, the safety of a passing vehicle may be threatened, or rainwater or the like may permeate into the inside of the pavement from the cracked portion and cause damage or destruction of the pavement itself.

Conventionally, as a method for repairing such aged and deteriorated road pavement, a spraying type surface treatment method, a mixed type surface treatment method, and an overlay method have been proposed. Among them, the spray-type surface treatment method is, for example, a binder made of a bituminous material such as asphalt is sprayed in a film shape on a road surface where unevenness or cracks have occurred due to aging or deterioration, and then aggregates are applied thereon. Repeat the spraying operation once or multiple times to bond the aggregate to the road surface with the binder,
This is a method of constructing one or more layers of a binder and an aggregate on the road surface.

This spray-type surface treatment method is extremely effective as a method for repairing an aged or deteriorated pavement because the surface of the pavement can be repaired relatively easily, but the repair method using an asphalt mixture is On the other hand, since the aggregate is simply joined to the road surface by the binder, the aggregate scattered on the binder may be slightly damaged by the scratching force and the impact force received from the tires of the passing vehicle. There was a phenomenon that it was scattered. If the aggregate scatters, the binder will appear directly on the road surface, causing the road surface to flash and become extremely slippery, causing slippage of passing vehicles, which in turn may cause a traffic accident. was there.

As an attempt to prevent the scattering of such aggregates, it is possible to increase the amount of the binder to be sprinkled to firmly bond the aggregates. However, when the road surface temperature rises in the summer when the sun is strong, a flash phenomenon occurs due to the excessive presence of the binder, which may result in a traffic obstacle.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the prior art, and provides a strong and stable aggregate material without using an excessive amount of binder. Surface treatment method that can be bonded on the road surface, pavement with excellent durability and stability constructed by such a treatment method, and further, such a treatment method can be easily performed. It is an object to provide a work vehicle that can be realized.

[0007]

Means for Solving the Problems As a result of repeated research on the spraying type surface treatment method, the present inventors
Instead of spreading the binder first and then the aggregate,
Surprisingly, a spray-type surface treatment layer that is strong, durable, and stable is built by first spreading the aggregate and then the binder and then further spreading the aggregate on top of it. The present invention has been completed by finding that it can be achieved.

That is, according to the present invention, the first aggregate is dispersed on the road surface, the binder is dispersed on the first aggregate, and then the second aggregate having a diameter smaller than that of the first aggregate is further dispersed. By providing the spreading type surface treatment method and the pavement constructed by such a spreading type surface treatment method, further, the aggregate spreading device and the binder spreading device are provided in this order from the front of the vehicle. The above problem is solved by providing a work vehicle provided with the work vehicle.

In the spraying type surface treatment method of the present invention,
The first aggregate is preferably compacted after application and before application of the binder. By this compaction, the first aggregate settles at a stable position on the road surface, and it becomes possible to realize a stronger and more durable surface treatment layer. Also,
When the first aggregate is thus compacted before the application of the binder, the first aggregate is a surface treatment layer consisting of the binder and the second aggregate that is subsequently constructed and the road surface. It plays the role of a buffer layer that connects between and, for example, even if there is an inconvenient unevenness on the construction road surface, the unevenness is rectified,
The surface treatment layer formed on the surface is made smooth and uniform.

As the first aggregate, if the grain size is regulated within a predetermined range, that is, if the minimum grain size of the aggregate is less than 10 mm in the nominal size of the sieve openings, the minimum grain size is The difference between the diameter and the maximum particle size is 2 mm in the nominal size of the sieve opening.
If the aggregate size is less than 5 mm and the minimum particle size is 10 mm or more in the nominal size of the sieve opening, the difference between the minimum particle size and the maximum particle size is 3 mm in the nominal size of the sieve opening.
When the aggregate of 6 mm or less is used, the bonding force between the aggregates and between the aggregate and the road surface is further increased, and a more excellent surface treatment layer can be constructed.

In the spraying type surface treatment method of the present invention,
As a binder, the absolute viscosity at 60 ℃ is about 15,000
It is desirable to use more than poise. By using a binder having a viscosity equal to or higher than a predetermined value as described above, even when the binder is sprinkled continuously on the road surface having large unevenness or deformation, the sprinkled binder does not adhere to the road surface. The film thickness of the binder on the road surface does not become non-uniform by flowing along the slope, and a uniform and stable bonding force can be obtained.

In the spraying type surface treatment method of the present invention,
The second aggregate is sprinkled on the binder and has a role of constructing a surface treatment layer together with the first aggregate and the binder, and at the same time, it is constructed as a top layer. It also has a function as a function-imparting layer that imparts various functions to the surface-treating layer, or as a protective layer that protects the constructed surface-treating layer.

As the function-imparting layer, for example, colored aggregate, light-reflecting, glittering, fluorescent and / or light-accumulating aggregate, aggregate having an antifreezing effect, and elastic bone By using one or more kinds of aggregates selected from the materials as the second aggregate, it is possible to add color to the constructed surface treatment layer to form a color pavement, or to reflect light. To provide light-reflecting, fluorescent or light-accumulating pavement by imparting property or fluorescence or light-accumulating property, and further,
The construction of anti-icing pavements can also be done at will. In addition, aggregate of different stone quality, type, color etc.
One kind or two or more kinds, and / or one kind or two or more kinds of aggregates having different functions may be used in combination. For example, a glittering aggregate is used for the uppermost layer and a colored layer is provided immediately below it. For example, aggregates having different functions may be used for each layer to be constructed. In addition, as the protective layer, it prevents damage to the first aggregate, and contributes to the interlocking of the aggregates by interposing between the first aggregates to prevent the aggregate from scattering. You can

In the present invention, when the fibrous material is sprayed or spread at the same time as the binding material or before or after the binding material, the fibrous material and the binding material are mixed with each other to strengthen the aggregates more strongly. It is possible not only to bond the aggregate and the road surface, but also to construct a spray-type surface treatment layer having excellent durability and waterproof property.

In the spraying type surface treatment method of the present invention,
In particular, the time from the application of the binder to the application of the second aggregate is preferably a relatively short fixed time interval. Although the temperature of the binder is lowered immediately after being sprayed and the decomposition of the binder is promoted, the binder may be dispersed in the second
If the time until the dispersion of the aggregate is changed irregularly, the state of the binder at the time when the second aggregate is dispersed also changes irregularly, resulting in uniform and excellent durability. Surface treatment layer cannot be obtained. In order to maintain the time from the spraying of the binder to the spraying of the second aggregate at a relatively short constant time interval, use a work vehicle equipped with at least a sprayer for the binder and a sprayer for the aggregate. It is desirable to install it. Examples of such a work vehicle include, for example, Japanese Patent Application No. 10-158664 and Japanese Patent Application No. 10-1586 by the same applicant.
65, Japanese Patent Application No. 10-172107, Japanese Patent Application No. 10-172119, and Japanese Patent Application No. 10-
A work vehicle such as the work vehicle disclosed in the specification of No. 177986 includes one or a plurality of sets of an aggregate spraying device and a bonding material spraying device. Further, such a work vehicle is further equipped with a fiber material spraying device or a leveling device so that the fiber material can be sprayed or leveled at the same time as or before or after the binding material, and then relatively. It is possible to easily disperse the aggregate at short fixed time intervals.

The spray-type surface treatment method of the present invention is not limited to general roads, but is also used for automobile roads, premises roads, park roads, walking paths, bicycle paths, sports fields, parking lots, airfields, port facilities,
It is also applied to pavements such as open spaces attached to public halls and sidewalks with a wide width, and can be used not only for repairs but also for constructing surface layers in new construction.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.

First, the materials used will be described. <Binder> As the binder used in the spraying type surface treatment method of the present invention, asphalt, asphalt emulsion, resin,
Examples include paints, pavement tar, and cutback asphalt.

Examples of the asphalt used in the present invention include natural asphalt such as rake asphalt, straight asphalt, blown asphalt, semi-blown asphalt, petroleum asphalt such as solvent deasphalted asphalt (for example, propane deasphalted asphalt), These asphalts may be used alone or in combination of two or more.

It is desirable that these asphalts are modified with rubber or a thermoplastic polymer to increase their binding force or adhesive force. Examples of the rubber and thermoplastic polymer used for the modification include natural rubber, gata rubber, cyclized rubber, styrene / butadiene rubber, styrene / isoprene rubber, isoprene rubber, polyisoprene rubber, butadiene rubber, chloroprene rubber, butyl rubber, Rubber such as halogenated rubber, chlorinated polyethylene, chlorosulfonated polyethylene, ethylene propylene rubber, EPT rubber, alfin rubber, styrene / butadiene block copolymer rubber, styrene / isoprene block copolymer rubber, and ethylene / vinyl acetate copolymer. Examples thereof include thermoplastic polymers such as ethylene, ethyl acrylate copolymer, polyethylene, polyvinyl chloride, polyvinyl acetate, vinyl chloride / vinyl acetate copolymer, and vinyl acetate / acrylate copolymer. These rubbers or thermoplastic polymer compounds can be used alone or in combination of two or more.

The compounding ratio of the asphalt in the modified asphalt to the rubber and the thermoplastic polymer is usually 2 to 20 parts by weight of the rubber and the thermoplastic polymer based on 100 parts by weight of the asphalt. Ranges are preferred. If the amount of the rubber and the thermoplastic polymer is less than 2 parts by weight, the performance as modified asphalt cannot be exhibited, and the adhesive force between the aggregates and between the aggregates and the road surface and the grasping power are general asphalt. On the other hand, when the amount of the rubber and the thermoplastic polymer is more than 20 parts by weight, the cohesive force is too strong and, in return, separation from the aggregate occurs and scattering of the aggregate occurs. easy. The asphalt in the asphalt or modified asphalt used as the binder of the present invention has a penetration (25 ° C) of 4 in consideration of the characteristics after use.
It is preferable to use the one of about 0 to 200.

To the above-mentioned asphalt or modified asphalt used as the binder of the present invention, a thermoplastic solid resin, solid rubber, liquid resin, softening agent, plasticizer or the like is further added as a tackifier. be able to. As the tackifier added, for example, rosin and its derivative, terpene resin, petroleum resin and its derivative, alkyd resin, alkylphenol resin, terpene phenol resin, coumarone indene resin, synthetic terpene resin, alkylene resin, polyisobutylene, Examples thereof include polybutadiene, polybutene, a copolymer of isobutylene and butadiene, mineral oil, process oil, pine oil, anthracene oil, pine oil, animal and vegetable oil, polymerized oil, plasticizer and the like. Further, an antioxidant, an antioxidant, sulfur and the like can be added.

The asphalt emulsion used as the binder of the present invention includes natural asphalt such as lake asphalt, straight asphalt, blown asphalt,
Semi-blown asphalt, solvent deasphalting asphalt (eg, propane deasphalting asphalt), petroleum asphalt, heavy oil, tar, pitch, and the like, or a mixture of two or more bituminous substances, various surfactants and clay (eg Emulsifier such as bentonite), and further add alkali, acid, salt, dispersant, protective colloid, etc. as needed, and emulsify in water with a suitable emulsifier such as colloid mill, homogenizer, homomixer. It was made.

As the emulsifier, any of a cationic type, an anionic type and an amphoteric type can be used.

The cationic emulsifiers usable in the present invention include aliphatic or alicyclic monoamines, diamines, triamines, amidoamines having a long chain alkyl group,
Polyaminoethylimidazoline, long-chain hydroxyalkyldiamine, rosinamine, ethylene oxide adducts of these amines, amine oxides, or these amine-based surfactants treated with acids such as hydrochloric acid, sulfamic acid, and acetic acid Examples thereof include water-dispersible salts, and quaternary ammonium salts of these amine-based surfactants. Further, nonionic surfactants such as polyoxyethylene alkyl ether, polyoxyethylene alkyl allyl ether, and oxyethylene / oxypropylene block copolymer can be used together with these surfactants.

Examples of anionic emulsifiers usable in the present invention include higher alcohol sulfates, alkylallyl sulfonates, alkylbenzene sulfonates, α-olefin sulfonates, higher alcohol ethoxylates, higher alcohol ethoxylate sulfates, Soap, naphthalene sulfonate and formalin modified products,
Examples thereof include alkali lignin salts, lignin sulfonates, casein alkali salts, and polyacrylates.

Examples of the amphoteric emulsifier that can be used in the present invention include alkylphenols, mono- and polyhydric alcohol acids, alkylene oxide adducts such as aliphatics, aliphatic amines, aliphatic amides and ethanolamines. Is mentioned.

The dispersant and protective colloid used in the asphalt emulsion include sodium naphthalene sulfonate, casein, alginic acid, gelatin, carboxymethyl cellulose, ethyl cellulose, hydroxyethyl cellulose, polyvinyl alcohol, sodium polyacrylate, lignin sulfonate, Examples include nitrohumates.

The asphalt emulsion used as the binder of the present invention is modified by adding one or more selected from rubber and thermoplastic polymer to the bituminous material to be emulsified and dispersed. It is desirable to use it as an asphalt emulsion.

The rubber and thermoplastic polymer used for the modification include natural rubber, gutta-vircha, cyclized rubber, styrene-butadiene rubber, styrene-isoprene rubber,
Isoprene rubber, polyisoprene rubber, butadiene rubber, chloroprene rubber, butyl rubber, halogenated butyl rubber, chlorinated polyethylene, chlorosulfonated polyethylene, ethylene propylene rubber, EPT rubber, alfin rubber, styrene / butadiene block copolymer rubber, styrene / isoprene block Rubber such as copolymer rubber, ethylene / vinyl acetate copolymer, ethylene / ethyl acrylate copolymer, polyethylene, polyvinyl chloride, polyvinyl acetate, vinyl chloride / vinyl acetate copolymer, vinyl acetate / acrylate copolymer Examples thereof include thermoplastic polymers. These rubbers or thermoplastic polymer compounds can be used alone or in combination of two or more. These rubbers and thermoplastic high molecular weight polymers are, for example, powdery, latex-like, emulsion-like and aqueous-like ones, and latex-like, emulsion-like and aqueous-like ones are mainly obtained by a post-mix type method. Although it is used exclusively for the modified asphalt emulsion, it may be used for the modified asphalt emulsion by the premix type method.

In the above-mentioned asphalt emulsion or modified asphalt emulsion used as the binder of the present invention, a thermoplastic solid resin or solid rubber, a liquid resin, a softening agent, a plasticizer or the like is further added as a tackifier. It can be added. Examples of the tackifier added include, for example, rosin and its derivative, terpene resin, petroleum resin and its derivative,
Alkyd resin, alkylphenol resin, terpene phenol resin, coumarone indene resin, synthetic terpene resin, alkylene resin, polyisobutylene, polybutadiene, polybutene, copolymer of isobutylene and butadiene, mineral oil, process oil, pine oil, anthracene oil, pine oil , Animal and vegetable oils, polymerized oils, plasticizers and the like. Further, an antioxidant, an antioxidant, sulfur and the like can be added. Furthermore, for the purpose of adjusting the viscosity of the modified asphalt emulsion, it is possible to add a water-soluble polymer protective colloid such as MC, CMC, HEC, PVA, or gelatin.

The compounding ratio of asphalt to rubber and thermoplastic high molecular weight polymer in the modified asphalt emulsion is 2 to 20 parts by weight, preferably 2 to 20 parts by weight of rubber and thermoplastic high molecular weight polymer to 100 parts by weight of asphalt. Is in the range of 3 to 7 parts by weight. If the amount of the rubber and the thermoplastic polymer is less than 2 parts by weight, the effect of adding the rubber and the thermoplastic polymer to the adhesive force and gripping power to the aggregate after the modified asphalt emulsion is decomposed and cured On the other hand, when the amount of the rubber and the thermoplastic high molecular weight polymer exceeds 20 parts by weight, the cohesive force is too strong and peeling off from the aggregate occurs and the aggregate scatters. easy. The asphalt in the asphalt emulsion and modified asphalt emulsion used as the binder in the present invention has a penetration (25 ° C) of 40 to 20 in consideration of the characteristics after decomposition and curing.
It is preferable to use one of about 0.

The concentration of the evaporation residue (solid matter) of the asphalt emulsion and the modified asphalt emulsion used as the binder in the present invention is usually preferably about 30 to 70% by weight, particularly 50 to 68% by weight. The thing is more preferable. When the concentration of the evaporation residue is less than 30% by weight, it cannot be used, but it is difficult to obtain the viscoelasticity required for the binder, while the concentration of the evaporation residue is 7% or less.
If it exceeds 0% by weight, this cannot be used, but it tends to be difficult to ensure good workability.

In addition, these asphalt emulsions or modified asphalt emulsions contain an ultraviolet absorber, various additives, for the purpose of improving heat resistance, preventing deterioration due to ultraviolet rays, improving workability, and improving adhesiveness. A viscosity modifier or the like may be added.

The decomposition of the asphalt emulsion generally depends on natural decomposition, but in some cases, a decomposition accelerator may be used for forced decomposition.

The resin or paint used as the binder in the present invention includes, for example, epoxy resin, polyurethane resin,
Reactive binders such as bitumen-modified epoxy resin, bitumen-modified polyurethane resin, polyester resin, and methacrylate resin can be used. In addition, paints using these resins, paints using resins such as styrene / butadiene copolymer resins, alkyd resins (including those modified with melamine resins and phenol resins), and synthetic rubber and synthetic resins Paints containing as a main component can also be used.

The above-mentioned binder preferably has an absolute viscosity at 60 ° C. of about 15,000 poise or more, as described later. In addition, the absolute viscosity at 60 ° C. used in the present specification means the 60 ° C. viscosity test specified in “Handbook of Pavement Test Methods”, Japan Road Association, published June 10, 1995, page 398-402. It shall be the value measured based on the method.

<Aggregate> The aggregate used as the first and second aggregates in the present invention may be an aggregate for pavement described in “Asphalt Pavement Summary” issued by the Japan Road Association. Anything can be used, for example, crushed stone, cobblestone, gravel, steel slag, etc. Further, asphalt-coated aggregates obtained by coating these aggregates with asphalt, recycled aggregates, and the like can also be used. Other similar granular materials, such as artificial fired aggregate, fired foam aggregate, artificial lightweight aggregate,
It is also possible to use ceramic grains, luxovite, aluminum grains, plastic grains, ceramics, emery, construction waste materials, fibers and the like.

When the aggregate used in the present invention is coated with asphalt or the like, the amount of asphalt required for coating is in the range of about 0.1 to 1.5% by weight. In the case of porous aggregate such as steel slag, the amount is larger in the above range, and in non-porous aggregate such as hard sandstone, the amount is smaller in the above range.
As the asphalt used for coating, asphalt, asphalt emulsion, modified asphalt obtained by modifying these with rubber or polymer, modified asphalt emulsion and the like are also used. In addition, aggregate spray-coated with kerosene or the like may be used.

As the second aggregate, colored aggregates having various colors, light reflectivity, luster, fluorescence, and / or
Alternatively, one or two selected from among a phosphorescent aggregate, an aggregate having an antifreezing effect, and an aggregate having elasticity.
It is also possible to use more than one type of aggregate. For example, if a colored one is used among natural colored aggregates, artificial fired aggregates, fired foam aggregates, artificial lightweight aggregates, ceramic grains, loxobite, aluminum grains, plastic grains, ceramics, emery, etc. It is possible to easily realize a color pavement with excellent durability and stability. Note that these colored aggregates are usually used without precoating, but when used by precoating, it is of course possible to use a material that does not impair the coloring originally possessed by these aggregates. is there. Further, it is also possible to coat an ordinary aggregate with colored asphalt, fluorescent paint or phosphorescent paint and use it as colored aggregate or fluorescent aggregate or phosphorescent aggregate.

Light reflectivity, glitter, fluorescence, and / or
Luminescent aggregates include glass beads, silicon carbide particles, fused alumina artificial aggregates, limestone artificial aggregates, orthoclase, quartz, aluminum silicofluoride particles, glass scraps such as glass bottle crushed pieces, fluorescent artificial Examples thereof include aggregates and phosphorescent aggregates. Examples of aggregates having an antifreezing effect include rock salt and artificial antifreezing aggregates (for example, trade name "Koland", manufactured by Nichireki Co., Ltd.). As an aggregate having elasticity,
For example, there are waste tire rubber particles, natural rubber particles, styrene / butadiene rubber particles, chloroprene rubber particles, and the like, and if an aggregate having these elasticity is used, not only can the surface treatment layer be provided with impact absorption, Deformation due to noise reduction, and further, due to the weight of passing vehicles during freezing in winter,
It also has the effect of destroying the attached ice. Further, one or more kinds of aggregates having different stone quality, kind, color tone, etc., and / or one kind or two or more kinds of aggregates having different functions may be used in combination. It is also possible to use an aggregate having a different function for each layer to be constructed, for example, a glittering aggregate is used and a colored aggregate is used for the layer immediately below.

On the other hand, the aggregate used as the first aggregate is
As will be described later, when the minimum particle size of the aggregate is less than 10 mm in the nominal size of the sieve openings, the difference between the minimum particle size and the maximum particle size is 2 mm or more and 5 m in the nominal size of the sieve openings.
If the minimum particle size is 10 mm or more in the nominal size of the sieve opening, the difference between the minimum particle size and the maximum particle size is more than 3 mm in the nominal size of the sieve opening, 6 mm
The following is desirable. The "nominal size of the sieve opening" referred to in the present specification is a nominal size that is commonly used when the sieve is called, and is defined by JIS Z8801.
The standard size of the mesh opening of the mesh sieve defined in 1 above has a correspondence relationship as shown in Table 1.

[0043]

[Table 1]

That is, in the present specification, the minimum particle size of the aggregate is less than 10 mm in the nominal size of the sieve openings, and the standard size of the mesh sieve openings specified by JIS Z8801 is 9. It means that it contains aggregate particles that pass through a 5 mm sieve, and the minimum particle diameter of the aggregate is 10 mm or more in the nominal size of the sieve openings, the aggregate is JIS Z88.
The standard size of the mesh sieve opening specified by 01 is 9.5 m.
It means that it does not contain aggregate particles that pass through the m sieve. If the difference between the minimum particle size and the maximum particle size is 2 mm or more in the nominal size of the sieve openings, and the minimum particle size is 5 mm in the nominal size of the sieve openings, the maximum particle size of the aggregate is For diameters, at least pass through a sieve with a nominal size of 2 mm or more than 5 mm, that is, a sieve with a nominal size of 7 mm, while not passing through a sieve with a nominal size of 6 mm. Meaning and also
If the difference between the minimum particle size and the maximum particle size is less than 5 mm in the nominal size of the sieve openings, the minimum particle size is 5 mm in the nominal size of the sieve openings. A sieve with a nominal size of less than 5 mm than 5 mm,
This means passing through a sieve with a nominal size of 8 mm. Similarly, when the difference between the minimum particle size and the maximum particle size is more than 3 mm and 6 mm or less in the nominal size of the sieve opening, if the minimum particle size is 10 mm in the nominal size of the sieve opening, The largest particle size of the aggregate is at least a sieve with a nominal size of 3 mm larger than 10 mm, that is, a sieve with a nominal size of 13 mm that does not pass through a sieve with a nominal size of 13 mm, that is, with a nominal size of 16 mm. It means passing through a sieve.
It should be noted that here, whether to pass through the sieve or not to pass through is a judgment at a substantially common sense level, and a part such as dust may partially pass through the sieve or may be specific. Even if small grains remain on the sieve, if they are negligible to the aggregate aggregate, they shall not affect the decision not to pass through the sieve. In the present specification, unless otherwise specified, the particle size and particle size of the aggregate are based on the nominal size of the sieve openings.

The aggregate used as the first aggregate in the present invention is not particularly limited in the upper limit value and the lower limit value of the particle size as long as the above-mentioned condition of the particle size is satisfied. Is preferably 5 mm or more and the maximum particle size is 20 mm or less. If the minimum particle size is less than 5 mm, the particle size of the aggregate is too small, and there is a possibility that unevenness or cracks on the existing road surface may not be effectively covered. On the other hand, when the maximum particle size exceeds 20 mm, not only the road surface after the construction becomes rough, but also the vehicle travels on the surface treatment layer, which increases the traffic noise generated by the traveling of the vehicle and the bone. The material may scatter, which is not preferable.

The grain size of the second aggregate is not particularly limited as long as it is smaller than that of the first aggregate, but usually fine sand, medium sand, coarse sand and a grain size of 2.5 to 5 mm are used. No. 7 crushed stone is used.

<Fiber Material> Examples of the fiber material used in the present invention include synthetic fibers such as polyester, polyamide, aromatic polyamide, polypropylene, vinylon, acryl and polyvinylidene chloride, or semi-synthetic fibers, natural fibers,
Various materials such as glass fiber, recycled fiber, carbon fiber, and metal fiber are used, and among them, polyester fiber is preferable.

These fibers can be used as short fibers cut to an appropriate length, but they can also be used as a monofilament, a multifilament in which a large number of monofilaments are bundled, or a spun yarn or a twisted yarn. It is also possible to use it in the form of a sheet as a non-woven fabric, a woven fabric, or a knitted fabric.

The length of the short fibers is not particularly limited, but if it is too short, the fibers of the surface treatment layer will not be effective in maintaining the strength, waterproofing performance, and preventing cracks, so that the length is 3 mm or more, preferably 5 mm or more. It is preferably about 70 mm.

The present invention will be described in more detail below with reference to experimental examples.

<Experiment 1> Influence of the particle size of the first aggregate on the bonding force with the road surface To examine the influence of the particle size of the first aggregate on the durability of the spray-type surface treatment layer to be constructed, The adhesion test described below was conducted according to the Vialit adhesion test method.

That is, aggregate samples having various minimum and maximum particle sizes as shown in Table 2 were prepared. For example, in Table 2, No. The aggregate sample indicated by 1 has a nominal size of 5 mm.
Almost 100% by weight between the sieve and the 6 mm sieve
It is an aggregate sample in which the aggregate particles are distributed. 90 kinds of such various aggregate samples were prepared, dried and allowed to stand under the conditions specified in the viarit adhesion test method. In parallel with this,
Coarse sand was prepared, dried and allowed to stand in the same manner.

On the other hand, the thickness is 2 mm and the size is 200 × 200.
A metal plate of mm is prepared by the number of aggregate samples, and 90 grains of each of the above various aggregate samples are first sprayed as the first aggregate, 90 grains each, and then, asphalt emulsion ( For the aggregate sample with a minimum particle size of less than 10 mm, the product name "Surface sol" manufactured by Nichireki Co., Ltd. should be 1.15 kg / cm ² and the bone with a minimum particle size of 10 mm or more. 1.50 for wood samples
Disperse it so that it becomes kg / cm ^2, and further add 1 to the above coarse sand.
After spraying 20 cc each, apply a linear pressure of 7 kgf / cm, 15 times in opposite directions, for a total of 30
Rotating pressure was applied. After allowing this to stand for a predetermined period of time, while holding it horizontally with the surface where the aggregate is attached facing downward,
An iron ball having a weight of 0 mm and a weight of 500 g was dropped onto the center of the metal plate three times within 10 seconds. The number of the first aggregate particles peeled off from the metal plate due to the drop of the iron ball was counted and defined as a. The adhesion rate (%) is the adhesion rate (%) = {(90-a) / 90} × 1
It was calculated as 00. Each sample was tested three times, and the results were averaged, and an adhesion rate of 80% or more was evaluated as satisfactory. The results are shown in Table 2.

[0054]

[Table 2]

As is clear from Table 2, the minimum particle size is 10
In the case of an aggregate sample of less than mm, the difference between the minimum particle size and the maximum particle size is 2 mm or more and 5 m in the nominal size of the sieve opening.
In the case of an aggregate sample having a particle size of less than m and a minimum particle size of 10 mm or more, the difference between the minimum particle size and the maximum particle size is more than 3 mm and 6 mm or less in the nominal size of the sieve opening. But,
It was found that the adhesion rate was 80% or more, and that when used in the spraying type surface treatment method of the present invention, excellent bonding properties were exhibited.
Although the reason why such a result was obtained is not clear, if the difference between the minimum particle size and the maximum particle size is too small, the increase in the bonding force due to the biting of the aggregates is not expected, and On the contrary, if the difference between the minimum particle size and the maximum particle size is too large, it is presumed that uneven forces act according to the difference in particle size.

<Experiment 2> Effect of Binder Viscosity on Uniformity of Surface Treatment Layer In order to investigate the effect of binder viscosity on surface treatment layer uniformity, absolute viscosity at 60 ° C. shows various values. First, a binder was prepared, and the No. used in Experiment 1 was first put on an experimental pavement having an uneven surface cut out from the rutted road surface to replace the pavement. The aggregate samples of 3 were sprayed at a rate of 9 (liter / m ² ), lightly rolled, and then various binders were sprayed at a rate of 1.2 (liter / m ² ), respectively. Then, use the same coarse sand as used in Experiment 1
It was sprayed at a rate of (liter / m ² ) and rolled. The difference between the concave and convex portions of the experimental pavement was about 20 mm on average. The binder was cured until it hardened, and after curing, the experimental pavement was cut with a cutter, and the thickness of the binder at the bottom of the recess and the top of the protrusion was measured. The results are shown in Table 3 together with the type of binder used.

[0057]

[Table 3]

As is clear from the results shown in Table 3, the binders having absolute viscosities at 60 ° C. of about 8,000 poises and about 13,000 poises were applied to the first aggregate layer or the first aggregate layer by the action of gravity after spraying. It tends to flow between the aggregates and flow into the recesses on the road surface to stay there. At the top of the projections on the road surface, the thickness of the binder is thin at about 1.5 mm or 2 mm, and conversely,
About 4.5 mm to about 4 mm at the bottom of the road recess
And a thick binder layer was formed. Aggregate grains in the convex part,
When I tried to remove it with the tip of a spatula, it was relatively easy to remove. Further, in the concave portion, the amount of the binder is too large, and if it is left as it is, there is a risk of causing a flash phenomenon when the vehicle is actually used.

On the other hand, the absolute viscosity at 60 ° C. is about 150.
When it is more than 00 poise, the flow of the binder is suppressed, and there is not much difference in the thickness of the binder layer at the bottom of the road surface concave portion and the top of the convex portion. Attempts were made to peel off the aggregate particles in the projections and recesses with the tip of the spatula, but they were so tightly bonded that they could not be easily removed. From the above, the absolute viscosity at 60 ° C as a binder is about 15
If 000 poise or more is used, even if there is unevenness on the road surface, the binder does not flow on the road surface through the first aggregate layer or the gap between the first aggregates, and a uniform surface is obtained. It was found that the processing layer could be constructed.

Next, the spraying type surface treatment method of the present invention will be described with reference to the drawings.

First, after cleaning the constructed road surface with a road sweeper, as shown in FIG. 1, the first aggregate 2 is scattered on the road surface 1. Water, a primer, or the like may be sprayed before the first aggregate is sprayed. Water has the effect of lowering the road surface temperature that has risen in the summer, for example, and the primer has the effect of enhancing the adhesiveness and tackiness between the aggregate and the road surface. Application rate of the first aggregate, 100 m ² per 0.
The range of 6 to 2.5 m ³ is preferable. If the amount of aggregate dispersed per 100 m ² is less than 0.6 m ^3, it may cause a flash phenomenon, and the road surface may not be adjusted properly. On the other hand, if the amount of aggregate per 100 m ² exceeds 2.5 m ³ , the excess aggregate will not only prevent the passage of vehicles by buoyancy but also make the road surface difficult for pedestrians to walk. Further, it is desirable that the amount of the aggregate to be dispersed is increased as the aggregate has a larger particle size. The first aggregate is usually
Although it is sprayed while being heated to 100 to 170 ° C., it may be sprayed at room temperature. After applying the first aggregate, it is preferable to roll the application surface from the viewpoint of stabilizing the first aggregate layer.

Subsequently, the binder 3 is sprayed. The amount of the binder sprayed is not particularly limited as long as the aggregate is bonded to the road surface, but usually, the range of 70 to 270 liters per 100 m ² is preferable. If the amount of the binder per 100 m ² is less than 70 liters, the bonding force and the adhesive force between the road surface and the aggregate and between the aggregates may be insufficient. On the contrary, if it exceeds 270 liters, the flash phenomenon may occur. Cause. The amount of the binder spread varies depending on the particle size of the first aggregate. Generally, the amount of the binder spread is larger when the aggregate having a larger particle size is used as the first aggregate. Will increase.

After spraying the binder, the second aggregate 4 is sprayed on the sprayed binder. The application amount of the second aggregate is 100
The range of 0.2 to 1.5 m ³ per m ² is preferable. 100
When the amount of aggregate dispersed per m ² is less than 0.2 m ³ , the gap between the first aggregates cannot be sufficiently filled, and it is difficult to obtain a highly durable surface-treated layer, and thus the surface-treated layer. Destabilize. It also causes a flash phenomenon. Conversely, 10
When the amount of the second aggregate per 0 m ² exceeds 1.5 m ³ , the excess aggregate not only prevents pedestrians from walking, but also makes the road surface difficult for pedestrians to walk.

After the second aggregate 4 is sprayed, the compaction is further performed, and the floating sweepers are used to remove the floating stones and open them to traffic. As the roller compactor, for example, a self-propelled roller compactor such as a tire roller, an iron wheel roller, or a vibration roller can be used. The surface treatment layer of the present invention constructed as described above, after being subjected to traffic, with the passage of time,
For example, it becomes stable as shown in FIG. That is,
As shown in FIG. 2, the binding material is attached from above the first aggregate so as to wrap the first aggregate, and further, the gap between the first aggregates and the first aggregate are The second aggregate enters into the gap with the road surface, and the aggregates bite each other to form a strong surface treatment layer.

It should be noted that it is desirable that the above-mentioned spraying of the binder and the spraying of the second aggregate are carried out at a constant short time interval as much as possible. For example, Japanese Patent Application No. 1 by the same applicant
0-158664, Japanese Patent Application No. 10-158665
Specification, Japanese Patent Application No. 10-172107, Japanese Patent Application No. 10-172119, and Japanese Patent Application No. 10-17
It is desirable to use a work vehicle as disclosed in 7986. In the work vehicle disclosed in these specifications, both the sprinkling device of the binding material and the sprinkling position of the aggregate are located in front of the front wheels of the work vehicle, between the front wheels and the rear wheels, or behind the rear wheels. Since the aggregate is spread immediately after the binder is spread, the tires or crawlers of the work vehicle do not step on the spread binder and the binder once spread. There is no risk of peeling off or sticking to tires or the like to stain other road surfaces. Moreover, in the work vehicle as disclosed in the above specification, both the sprinkling device for the binder and the sprinkling device for the aggregate are mounted on a single work vehicle, and the respective sprinkling is performed. It is possible to manage and carry out from the application of the binder to the application of the aggregate as a consistent work, and it is possible to build a stable surface treatment layer that is uniform and rich in durability. An example of such a work vehicle is shown in FIG.
~ Shown in FIG.

FIG. 3 shows an example of a work vehicle in which both the sprinkling device for the binder and the sprinkling device for the aggregate are arranged in front of the front wheels of the work vehicle. In FIG. 3, reference numeral 5 indicates the work vehicle. , 6a,
6b is a front wheel and a rear wheel of the work vehicle 5, 7 is a spray nozzle as a binder spraying device, and 8 is an aggregate bin as an aggregate spraying device. As the aggregate bottle, for example, the above-mentioned Japanese Patent Application No. 10-158 filed by the same applicant is used.
664 specification, Japanese Patent Application No. 10-158665 specification,
Japanese Patent Application No. 10-172107, Japanese Patent Application No. 10-17
The one mounted on the work vehicle disclosed in the specification of No. 2119 and the specification of Japanese Patent Application No. 10-177986 is used. The binder is carried in from a supply vehicle (not shown) through a carry-in socket indicated by reference numeral 9, pressure-fed to the spray bar 11 by the carrier pump 10, and sprayed from the spray nozzle 7 toward the road surface.

On the other hand, the aggregate is introduced into the aggregate bin 8 from the aggregate transport vehicle 12, and the aggregate 3 as the aggregate 3 is provided between the aggregate spread width adjusting door 13 and the aggregate transport roll 14. It is scattered. In addition, 15 is a support arm, 16 is a push roller which pushes the rear wheel of the aggregate carrier 12, and 17 is an engine.

FIG. 4 shows an example of a work vehicle in which both the sprinkling device for the binder and the sprinkling device for the aggregate are arranged between the front and rear wheels of the work vehicle. The same reference numerals are attached. The work vehicle 5 shown in FIG. 4 is provided with a storage tank 18 for the binding material, and the binding material is introduced into the storage tank 18 from a supply vehicle (not shown) via the carry-in socket 9 to, for example, bring the temperature to a predetermined temperature. It is maintained and maintained. 19
Is a water tank and 21 is a primer tank. The binder is pressure-fed to the spray bar 11 by the transport pump 10 and sprayed from the spray nozzle 7. The aggregate is
As in the example of FIG. 3, the aggregate bins 8 are sprinkled onto the layer of binder. In addition, 20 is a mounting table on which the rear wheels of the aggregate carrier 12 are placed, 22 is a spray bar for water or a primer, and 23 is a spray nozzle. Further, 24 is a work step, 25 is a heating device for heating the road surface, and 26 is an energy source for the heating device 25.

FIG. 5 shows an example of a work vehicle in which both the sprinkling device for the bonding material and the sprinkling device for the aggregate are arranged behind the rear wheel of the work vehicle, and are the same as those in FIGS. 3 and 4. Are given the same reference numerals. The binding material is carried in from a supply vehicle (not shown) through a carry-in socket 9, and then temporarily stored in a tank (not shown) in the work vehicle 5, and sprayed from the spray nozzle 7 onto the road surface. On the other hand, the aggregate is carried into the aggregate popper 27 from an aggregate transporting vehicle (not shown), transported to the transport conveyor 28, and scattered from the aggregate bin 8. In the working vehicle of FIG. 5, the sprinkler of the binder and the sprinkler of the aggregate are reversed, and the sprinkler of the aggregate and the sprinkler of the binder are arranged in this order from the front of the work vehicle to the rear wheels of the work vehicle. It may be arranged behind.

When a two-component resin is used as the binder, a mixture of the two may be sprayed immediately before spraying. In the above work vehicle, the spray nozzle of the binder is used. The main agent may be sprayed with water or a curing agent or the like from a spray nozzle for a primer, and the both may be contact-mixed in the air or on the road surface. In addition, separately
Needless to say, a nozzle for the curing agent may be provided.

Further, in the spraying type surface treatment method of the present invention, the fibrous material may be sprayed or spread evenly at the same time as the spraying of the binder or before or after the spraying of the binder. In order to spread or spread the fibrous material at the same time as or after the spreading of the binder, it is desirable to use, for example, a work vehicle as shown in FIG. The work vehicle of FIG. 6 is an example of a work vehicle in which a binder spreading device, an aggregate spreading device, and a fiber material spreading or spreading device are all arranged behind the work vehicle rear wheel,
The same parts as those in FIGS. 3 to 5 are designated by the same reference numerals.

In FIG. 6, reference numeral 29 indicates a device for storing a fiber material such as a monofilament, a multifilament, a spun yarn, a twisted yarn, etc., and the stored fiber material 30 is in a random direction from a nozzle 31 or in a fixed direction. It is designed to be injected into. The fiber material storage device 29 can also store the short fibers 32 together, and the short fibers 32 are also jetted from the nozzle 31. In the illustrated example, the fibrous material is adapted to be sprayed after the binder is sprayed from the nozzle 7. However, the distance between the nozzle 7 of the binder and the nozzle 31 of the fiber material is reduced so that the two are It is also possible to spray at the same time and mix them in the air.

Although not shown in the drawing, a nozzle for injecting a fiber material such as a monofilament, a multifilament, a spun yarn, or a twisted yarn in the vehicle width direction of the work vehicle can be additionally provided. By ejecting the fibrous material in the vehicle width direction of the work vehicle with the nozzles that are not provided, and ejecting the fibrous material from the nozzle 31 in parallel with the traveling direction of the work vehicle, the same or different types of fibrous materials are orthogonal to each other on the road It is also possible to deposit on.

On the other hand, reference numeral 33 indicates an accommodating device for a sheet-shaped fiber material 34 such as a non-woven fabric, a woven fabric or a knitted fabric, and the sheet-shaped fiber material is wound and held in a roll shape. The sheet-shaped fiber material is delivered by the delivery device 35 and spread on the road surface. Reference numeral 36 is a pressing roller that brings the fed sheet-shaped fiber material 34 into close contact with the road surface. The amount of fiber used is the basis weight, usually 25 g
/ M ² to 150 g / m ² , but preferably 5
It is 0 g / m ² to 120 g / m ² .

As described above, by spreading or laying the fibrous material at the same time as or before or after the binding material, the binding material and the fibrous material are mixed and impregnated with each other to firmly bond the aggregate. The surface treatment layer not only has excellent durability and stability, but also has excellent crack followability and waterproofness.

Further, as shown in, for example, FIGS. 7 and 8, the aggregate dispersal device 8a for the first aggregate and the aggregate disperser 8a for the second aggregate are provided in front of the vehicle with respect to the dispersal device 7 for the binding material. It may be provided separately from the aggregate dispersal device 8b. 7 and 8
In the aggregate hopper 27, two kinds of aggregates are stored, and the separate aggregate conveyors 28a and 28b respectively disperse the aggregates for the first aggregate 8a and the aggregates for the second aggregate. It is conveyed to the device 8b. Alternatively, the aggregate dispersal devices 8a and 8b may have a large capacity and a necessary amount may be stocked in advance. By using such a work vehicle, the spraying type surface treatment layer of the present invention can be constructed at once. Needless to say, a rolling device (not shown) may be provided between the first aggregate disperser 8a and the binder disperser 7.

The present invention will be further described below with reference to examples, but it goes without saying that the present invention is not limited to these examples.

<Example 1> Using the following materials, the spraying type surface treatment method of the present invention was carried out on a trial basis using a work vehicle as shown in FIG. Work vehicle traveling speed is about 5 km / h
Met. First, the construction road surface was cleaned with a road sweeper, and then the work vehicle was advanced to spray only the first aggregate.
After spraying, it was lightly rolled with an iron wheel roller. Then, using the same work vehicle, the binder and the second aggregate were sprinkled on the first aggregate layer. After spraying, rolling was performed with tire rollers, and floating stones were removed with the road sweeper again, and the construction was completed. Although there was a rut with a maximum depth of about 15 mm on the constructed road surface, it was possible to construct a uniform surface treatment layer without the binder flowing. Immediately after the construction, the heavy-duty loaded vehicle was allowed to pass on a trial basis for half a day continuously, but no scattering of aggregate was observed.

<Materials used> First aggregate: crushed stone (produced by Kuzu, Tochigi Prefecture) Grain size 5-8 mm Precoated with 0.5 wt% straight asphalt Spraying temperature Heating (170 ° C) Spraying amount 1.1 (m ³ / 100m ² ) Binder: Modified asphalt (Gumphalt S-SP, manufactured by Nichireki Co., Ltd.) Absolute viscosity at 60 ° C 19500 Poise Dispersion temperature Heating (170 ° C) Dispersion amount 140 (l / 100m ² ) Second aggregate: Crushed stone (Kuzu production in Tochigi prefecture) Particle size 2.5-5mm No precoating Spraying temperature Heating (170 ° C) Spraying amount 0.4 (m ³ / 100m ² )

Example 2 The spraying type surface treatment method of the present invention was carried out on a trial basis in the same manner as in Example 1 except that the following materials were used. Although there were some cracks with a width of 5 mm or less on the constructed road surface, they were completely covered by the constructed surface treatment layer. The constructed surface treatment layer was uniform, and immediately after construction, an attempt was made to peel off the aggregate grains with the tip of the driver, but it was fairly strongly bonded to the road surface. Further, the heavy-duty loaded vehicle was continuously passed for half a day, but no scattering of aggregate was observed and no floating of cracks was observed.

<Materials used> First aggregate: crushed stone (Kuzu, Tochigi prefecture) Grain size 5-8 mm 0.5 wt% of straight asphalt precoat spray temperature heating (170 ° C) spray amount 1.1 (m ³ / 100m ² ) Binder: Modified asphalt emulsion (surface sol,
Nichireki Co., Ltd.) Absolute viscosity at 60 ° C 15,000 Poise Dispersion temperature Heating (60 ° C) Dispersion amount 160 (l / 100m ² ) Second aggregate: Coarse sand (produced by Kinugawa, Tochigi Prefecture) Dispersion temperature without precoating Normal temperature (18 ° C) ) Spray amount 0.5 (m ³ / 100m ² )

Example 3 Using the work vehicle shown in FIG.
The spray-type surface treatment method of the present invention was carried out on a trial basis in the same manner as in Example 1 except that the following fibrous materials were sprayed immediately after spraying the binder. The constructed surface treatment layer was uniform, and immediately after construction, an attempt was made to peel off the aggregate grains with the tip of the driver, but it was fairly strongly bonded to the road surface.
Further, the heavy-duty loaded vehicle was passed continuously for half a day, but no scattering of aggregate was observed.

Fiber material: Polyester fiber (100 denier, 48 filament, manufactured by Toyobo Co., Ltd.) Fiber length 20 mm Dispersion amount 90 (g / m ² ).

Example 4 The spraying type surface treatment method of the present invention was carried out in the same manner as in Example 1 except that the following second aggregate was used. The constructed surface treatment layer is
It had a bright red color and could easily build a colored pavement. Further, almost no scattering of aggregate grains was observed.

Second aggregate: Red aggregate (Road Serum No. 7 grain-R, manufactured by Naigai Ceramics Co., Ltd.) Particle size 2.5-5 mm Spraying temperature Normal temperature (18 ° C.) Spraying amount 0.5 (m ³ / 100m ² )

Example 5 The spraying type surface treatment method of the present invention was carried out in the same manner as in Example 1 except that the following second aggregate was used. The constructed surface treatment layer is
Even at night, the headlights of the vehicle were reflected and shined brightly, making it possible to easily construct a light-reflecting pavement. Further, almost no scattering of aggregate grains was observed.

[0087] The second Aggregate: artificial bone material (Twinkle White, manufactured out Ceramics Co.) having a grain size of 2.5-5mm spraying temperature room temperature (18 ° C.) application rate 0.5 ^(m 3/100 m ²⁾

<Comparative Example 1> As No. 1 shown in Table 2 as the first aggregate. A surface treatment layer was constructed on the road surface adjacent to Example 1 in the same manner as in Example 1 except that the aggregate of 6 was used and the following was used as the binder. Immediately after construction,
When a heavy-duty vehicle was passed continuously for half a day, a flash and scattered traces of aggregate were found in the rut.

Binder: Experimentally prepared modified asphalt emulsion A Absolute viscosity at 60 ° C. 8000 Poise Dispersion temperature Heating (180 ° C.) Dispersion amount 110 (l / 100 m ² ).

Comparative Example 2 The same procedure as in Example 1 was carried out except that only the binder and the second aggregate were sprayed using the work vehicle shown in FIG. 5 using the following materials. A surface treatment layer was constructed on the adjacent road surface. The binder flowed to the rut portion of the road surface, and a non-uniform surface treatment layer was constructed in which the binder excess portion and binder deficient portion were mixed. Immediately after construction, the heavy-duty loaded vehicle was passed continuously for half a day, and scattering of aggregate was found in the part where the binder was insufficient.

Binder: Experimentally prepared modified asphalt emulsion B Absolute viscosity at 60 ° C. 13000 Poise Dispersion temperature Heating (60 ° C.) Dispersion amount 90 (l / 100 m ² ) Second aggregate: Crushed stone (Katsura, Tochigi Prefecture) Particle size 2.5-5 mm Spraying temperature without precoating Room temperature (18 ° C) Spraying amount 0.5 (m ³ / 100m ² ).

[0092]

As described above, according to the spraying type surface treatment method of the present invention, the first aggregate is first sprayed on the road surface, and then the binder and the second aggregate having a diameter smaller than that of the first aggregate are used. Since the aggregate is sprayed, the binder wraps around the first aggregate, and the second aggregate is provided between the first aggregate particles and in the gap between the first aggregate and the road surface. It is possible to build a very strong and stable surface-treated layer with little scattering of aggregates by getting in and biting each other. Moreover, by rolling the distribution surface of the first aggregate, the position of the first aggregate on the road surface becomes stable, and even if there is some unevenness on the constructed road surface,
Effective rectification is performed.

Further, since the aggregate having the regulated particle size is used as the first aggregate, the adhesive force of the aggregate to the road surface is increased, and a stable and durable surface treatment layer is constructed. can do. Furthermore, since a binder having an absolute viscosity at 60 ° C. of about 15,000 poise or more is used, even when unevenness or slope exists on the road surface to be constructed,
The dispersed binder does not flow unnecessarily, the binder does not become excessive or insufficient depending on the place, and a uniform and durable surface-treated layer can be constructed.

As the second aggregate, colored aggregate, light-reflecting, glittering, fluorescent, and / or light-accumulating aggregate,
If one or more aggregates selected from aggregates having antifreezing effect and aggregates having elasticity are used,
Functional pavements such as color pavement, light-reflecting pavement, and anti-freezing pavement can be easily realized. Furthermore, by spreading or spreading the fibrous material at the same time as or before or after the binder, it is possible to construct a surface-treated layer that is excellent not only in durability but also in waterproofness.

The spray-type surface treatment method of the present invention is a surface treatment layer which is constructed by using a specific work vehicle as disclosed in the present specification so that further uniformity, durability and stability are constructed. It is a very useful and excellent invention together with the pavement of the present invention having a surface treatment layer to be constructed. INDUSTRIAL APPLICABILITY The present invention exerts excellent effects not only on repairing existing road surfaces but also on new road surfaces, and brings new possibilities to the technical field.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a spraying type surface treatment method of the present invention.

FIG. 2 is a diagram showing an example of a spraying type surface treatment method of the present invention.

FIG. 3 is a diagram showing an example of a work vehicle used in the present invention.

FIG. 4 is a diagram showing another example of a work vehicle used in the present invention.

FIG. 5 is a diagram showing still another example of the work vehicle used in the present invention.

FIG. 6 is a diagram showing still another example of the work vehicle used in the present invention.

FIG. 7 is a diagram showing an example of a work vehicle of the present invention.

FIG. 8 is a diagram showing another example of the work vehicle of the present invention.

[Explanation of symbols]

1 road surface 2 First aggregate 3 binder 4 Second aggregate 5 work vehicle 6a, 6b Work vehicle tires 7,23 spray nozzle 8, 8a, 8b Aggregate bottle 9 carry-in socket 10 Transport pump 11,22 spray bar 12 Aggregate carrier 13 Aggregate spread width adjustment door 14 Aggregate discharge roller 15 Support arm 16 push roller 17 engine 18 Binder storage tank 19 water tank 20 table 21 Primer tank 24 work steps 25 heating device 26 energy sources 27 Aggregate hopper 28 Conveyor 29 Fiber material storage device 30 fiber materials 31 nozzles 32 short fibers 33 Sheet-shaped fiber material storage device 34 Sheet fiber material 35 Sending device 36 Pressing roller

Continuation of front page (56) Reference JP 54-33335 (JP, A) JP 8-109603 (JP, A) JP 10-54004 (JP, A) JP 10-102421 (JP , A) French patent application publication 2695949 (FR, A 1) French patent application publication 2665197 (FR, A 1) French patent application publication 2626907 (FR, A 1) (58) Fields investigated (Int.Cl. ⁷ , DB name) E01C 7/32 E01C 7/08

Claims (8)

(57) [Claims] 1. A minimum of aggregate as the first aggregate on the road surface
When the particle size is less than 10 mm in the nominal size of the sieve opening
The difference between the minimum particle size and the maximum particle size is called the sieve opening.
The minimum size is 2 mm or more and less than 5 mm.
When the particle size is 10 mm or more in the nominal size of the sieve opening
The difference between the minimum particle size and the maximum particle size is called the sieve opening.
And a size of more than 3 mm and 6 mm or less are spread, a binder is spread on the aggregate, and then a second aggregate having a diameter smaller than that of the first aggregate is further dispersed. 2. The spray-type surface treatment method according to claim 1, wherein the binder is sprayed after the compacted surface of the sprayed first aggregate is compressed. 3. A spray-type surface treatment method according to claim 1 or 2, wherein the second aggregate is sprayed as a protective layer. 4. The second aggregate is colored aggregate, light-reflecting,
1. One or more kinds of aggregates selected from glittering, fluorescent, and / or luminous aggregates, aggregates having an antifreezing effect, and aggregates having elasticity. Two
Alternatively, the spray-type surface treatment method described in 3 . 5. The absolute viscosity at 60 ° C. is about 15,000.
Claim to use poise or more binders 1, 2, 3 or 4
The spray-type surface treatment method described. 6. binder simultaneously or in tandem spraying type surface treatment method of spraying or laying leveling claim 1, 2, 3, 4 or 5, wherein the fibrous material. 7. A work vehicle equipped with at least a sprinkler for binder and a sprinkler for aggregate is used to sprinkle the binder at a substantially constant time interval after the first aggregate is sprayed, and 7. The spray type surface treatment method according to claim 1, 2, 3, 4, 5 or 6 , wherein the second aggregate is sprayed at a substantially constant time interval after spraying the binder. 8. A pavement constructed by the spraying type surface treatment method according to claim 1, 2, 3, 4, 5, 6 or 7 .