JP4299871B2 - Asphalt paving method - Google Patents

Description

  The present invention relates to an asphalt pavement method provided with a waterproof layer.

  In recent years, in the bridges of roads, railways, etc., if asphalt pavement material is simply applied to the surface of a base material such as concrete, it has become a problem in recent years that rainwater wraps around and promotes deterioration of the base material. That is, when sufficient waterproofing is not applied to the surface of the base body, the problem that the durability of the bridge is reduced before the end of the service life has surfaced.

  Therefore, in recent years, a technique for providing a waterproof layer between an asphalt pavement and a base made of a concrete slab, a steel slab, or the like has been developed.

  For example, in Patent Document 1 below, a room temperature curable synthetic resin that forms a waterproof film is applied to the upper surface of a concrete floor slab, and before the synthetic resin is cured, a pellet of a hot melt resin is sprayed on the synthetic resin, An asphalt pavement method is disclosed in which after the synthetic resin is cured, a heating mixture for forming a pavement layer such as an asphalt pavement is laid on the synthetic resin.

  Further, in Patent Document 2 below, a step of applying a fast-curing liquid resin on a floor slab to form a waterproof layer, and a flexible resin adhesive is applied on the waterproof layer to form a primary adhesive layer. A step, a step of spraying a granular or pellet-like hot melt adhesive over the entire area of the primary adhesive layer, and a step of paving a heated asphalt pavement on the granular or pellet-like hot melt adhesive. An asphalt pavement method provided is disclosed.

  In Patent Document 3 below, a waterproof layer is formed by applying a urethane resin on a base, a urethane primer is applied on the upper surface of the polyurethane waterproof layer, and the softening point is 35 before the urethane primer is cured. A thermoplastic resin powder or granule of ˜130 ° C. is laid, and a heated asphalt concrete pavement material is laid thereon to form a thermoplastic resin layer between the polyurethane primer layer and the asphalt concrete layer, and thermoplasticity An asphalt pavement method in which a part of a resin layer and at least a part of a urethane primer are bonded and integrated is disclosed.

Further, in Patent Document 4 below, a granular bonding agent containing a thermosetting polyurethane elastomer is sprayed on the resin waterproof layer while the resin waterproof layer is not yet cured, and then heated asphalt mixture. A method for waterproofing a floor slab characterized by paving using a slab is disclosed.
Japanese Patent Publication No. 8-9851 JP 2004-92375 A JP 2003-253608 A JP 2004-52278 A

  In Patent Documents 1 to 4, a granular thermoplastic resin is laid on a waterproof layer, and a heated asphalt pavement material is laid thereon to form an asphalt layer. Since the granular thermoplastic resin may be spread on the waterproof layer, the workability is good. However, in the methods disclosed in Patent Documents 1 to 4, the adhesion between the waterproof layer and the asphalt layer is not sufficient. .

  Accordingly, an object of the present invention is to provide an asphalt pavement method capable of forming an asphalt pavement structure having excellent physical properties such as adhesion and waterproofing over a long period of time.

In order to achieve the above object, the asphalt pavement method of the present invention has a waterproof layer formed on a substrate, the solvent content selected from thermosetting acrylic resin, unsaturated polyester resin and vinyl ester resin is 10% by mass or less. 0.4 to ² kg / m ² of a liquid thermosetting resin, and 0 to a granular thermoplastic resin having an average particle size of 0.5 to 7 mm selected from ethylene vinyl acetate copolymer thermoplastic elastomer and styrene thermoplastic elastomer After coating ² to ² kg / m ² and curing the liquid thermosetting resin to form an adhesive layer, a heated asphalt pavement material is laid on the adhesive layer to form an asphalt layer. It is characterized by.

According to the present invention, a liquid thermosetting resin is applied in an amount of 0.4 to ² kg / m ² and a granular thermoplastic resin having an average particle diameter of 0.5 to 7 mm is applied in an amount of 0.2 to ² kg / m ² . The waterproof layer and the asphalt layer are bonded through an adhesive layer formed by curing the liquid thermosetting resin. The adhesive layer has irregularities in which the granular thermoplastic resin in the layer is covered and fixed with a thermosetting resin, and the granular shape appears on the surface. The thermosetting resin is concentrated and hardened on the side and bottom of the granular thermoplastic resin, but the upper surface of the granular thermoplastic resin exists in an extremely thin shell shape. For this reason, when a heated asphalt pavement material is laid, the thermosetting resin layer in the adhesive layer retains its shape without flowing due to the heat from the asphalt pavement material. Breaks or melts the shell covered with the thermosetting resin by heat from the asphalt pavement and pressure due to the rolling pressure, and the asphalt pavement is wholly or partially integrated. When the asphalt pavement is integrated with the entire thermoplastic resin, the asphalt pavement material enters the portion where the granular thermoplastic resin was present, that is, into the concave recess of the thermosetting resin layer, thereby providing an anchor effect. Adhesive strength, when integrated with part of granular thermoplastic resin, adhesive force between partially molten granular thermoplastic resin and asphalt pavement, and granular thermoplastic resin and thermosetting resin The asphalt layer is firmly bonded to the adhesive layer. As a result, the asphalt layer does not easily swell or partially peel off, and an asphalt pavement structure having excellent durability with respect to running of a vehicle or the like can be formed on the base.
The liquid thermosetting resin is selected from a thermosetting acrylic resin, an unsaturated polyester resin, and a vinyl ester resin, and the granular thermoplastic resin is an ethylene vinyl acetate copolymer thermoplastic elastomer and a styrenic thermoplastic resin. Since it is selected from an elastomer, the thermosetting resin is cured with part of the surface of the granular thermoplastic resin dissolved in the thermosetting resin, and the granular thermoplastic resin and the thermosetting resin are firmly bonded. An adhesive layer is formed. For this reason, for example, even when the granular thermoplastic resin does not melt sufficiently, such as when the outside air temperature is low such as in winter, due to the compatibility effect between the partially molten granular thermoplastic resin and the asphalt pavement material Since the adhesive force and the adhesive force by the melt adhesion between the granular thermoplastic resin and the thermosetting resin can be obtained, these act synergistically and the adhesive force between the waterproof layer and the asphalt layer can be sufficiently secured as a whole.

  The adhesive layer of the asphalt pavement method of the present invention, after applying the liquid thermosetting resin to the waterproof layer, before supplying the granular thermoplastic resin before the liquid thermosetting resin is cured, The liquid thermosetting resin is cured or formed, or a resin composition containing the liquid thermosetting resin and the granular thermoplastic resin is applied to the waterproof layer, and the liquid thermosetting is applied. The resin is preferably formed by curing.

  In the asphalt pavement method of the present invention, the adhesive preferably contains 10 to 80% by mass of the liquid thermosetting resin and 90 to 20% by mass of the granular thermoplastic resin. According to this aspect, since the asphalt pavement material can easily enter the recess formed on the thermosetting resin, the shear adhesive force due to the anchor effect is further improved.

  In the asphalt pavement method of the present invention, the softening point of the granular thermoplastic resin is preferably 60 to 250 ° C. When the softening point of the granular thermoplastic resin is in the above range, the granular thermoplastic resin is easily melted or fluidized by the heat when the asphalt pavement is laid, so that the adhesive force is improved.

  In the asphalt pavement method of the present invention, the granular thermoplastic resin comprises a low softening point thermoplastic resin having a softening point of 60 to 100 ° C and a high softening point that is 10 to 150 ° C higher than the softening point of the softening point thermoplastic resin. It preferably contains a thermoplastic resin. According to this aspect, when the asphalt pavement material is laid, the low softening point thermoplastic resin is easily melted, so that an adhesive force due to the anchor effect is easily obtained. Moreover, since the low softening point thermoplastic resin is easily integrated with the asphalt pavement material, the strength and heat resistance of the layer close to the bonding interface of the asphalt pavement material are improved. Further, the high softening point thermoplastic resin partially melts and adheres to the asphalt pavement, and the thermosetting resin layer in the adhesive layer and the granular thermoplastic resin remaining without melting are strong. Adhesive strength combined with adhesive strength is demonstrated. For this reason, these adhesive forces act synergistically at a wide range of pavement temperatures of approximately 100 to 170 ° C. assumed at the time of asphalt paving, and good adhesive strength is expressed between the waterproof layer and the asphalt layer.

  In the asphalt pavement method of the present invention, the granular thermoplastic resin preferably has a melt flow rate of 1 to 800 g / 10 min. If the melt flow rate of the granular thermoplastic resin is within the above range, the granular thermoplastic resin is easily melted or flowed by the heat when the asphalt pavement is laid, so that the adhesive strength of the asphalt layer is improved.

  In the asphalt pavement method of the present invention, the granular thermoplastic resin comprises a low melt viscosity thermoplastic resin having a melt flow rate of 100 to 800 g / 10 min, and a high melt viscosity thermoplastic resin having a melt flow rate of 1 to 100 g / 10 min. It is preferable to contain. According to this aspect, when the asphalt pavement is laid, the low melt viscosity thermoplastic resin is easily melted to obtain an adhesive force due to the anchor effect. Moreover, since the low melt viscosity thermoplastic resin is easily integrated with the asphalt pavement material, the strength and heat resistance of the layer close to the adhesion interface of the asphalt pavement material are improved. Further, the high melt viscosity thermoplastic resin tends to melt partially, and adheres to the asphalt pavement material, and the thermosetting resin layer in the adhesive layer, and the granular thermoplastic resin remaining without melting Adhesive strength combined with strong adhesive strength. For this reason, these adhesive forces act synergistically at a wide range of pavement temperatures of approximately 100 to 170 ° C. assumed at the time of asphalt paving, and good adhesive strength is expressed between the waterproof layer and the asphalt layer.

  In the asphalt pavement method of the present invention, it is preferable that the waterproof layer is a urethane resin waterproof layer, and a urethane primer is applied to the waterproof layer before forming the adhesive layer. According to this aspect, since the adhesion between the waterproof layer and the adhesive layer is improved, the asphalt pavement structure that further prevents the asphalt layer from being swollen or peeled off and is excellent in durability against traveling of a vehicle or the like is a base. Can be formed on top.

  According to the asphalt pavement method of the present invention, since the adhesive layer and the asphalt layer are firmly bonded, the asphalt layer is less likely to swell and partially peel off, and has excellent durability against running of vehicles and the like. A paving structure can be formed on the substrate.

  In the asphalt pavement method of the present invention, the base on which the waterproof layer is formed is not particularly limited, and examples thereof include concrete floor slabs and steel floor slabs for bridges such as roads and railways.

  Moreover, there is no limitation in particular as a waterproof layer, For example, a coating-film waterproof layer and a sheet-type waterproof layer are mentioned. Of these, a waterproof coating layer is preferable from the viewpoints of adhesion to a substrate and workability. And as a coating-film material which forms a coating-film waterproof layer, polyisocyanate compounds, such as 4-4-diphenylmethane diisocyanate, polyphenylmethylene polyisocyanate, carbodiimide modified diphenylmethane diisocyanate, or 4--4-diphenylmethane diisocyanate and a polyol Preferred examples include urethane resin coating materials, urea resin coating materials, and urethane urea resin coating materials mainly composed of isocyanate group-terminated prepolymers that are reactants. These coating materials may be either a one-component moisture curable type or a two-component mixed type in which a curing agent is mixed. In particular, a two-liquid mixed type spray type ultra-fast curing type coating material is preferable in that the working efficiency is good and a tough coating film can be formed.

  In the asphalt pavement method of the present invention, it is preferable to form the waterproof layer after forming the base primer layer by coating the base primer on the base prior to forming the waterproof layer on the base. By forming the base primer layer between the base and the waterproof layer, the adhesion between the base and the waterproof layer is improved. There is no limitation in particular as a base | substrate primer, It can change suitably with a waterproof layer. For example, when the waterproof layer is a waterproof coating layer made of a urethane resin coating material, a one-component moisture-curing urethane primer, a two-component urethane primer, a solvent-based epoxy primer, a water-based epoxy primer, a solvent-free epoxy primer, etc. Is preferred.

  In the asphalt pavement method of the present invention, the adhesive layer is formed of a liquid thermosetting resin (a1) and a granular thermoplastic resin (a2). This adhesive layer is formed by applying a liquid thermosetting resin (a1) and a granular thermoplastic resin (a2) to the waterproof layer, curing the liquid thermosetting resin (a1) by curing for 1 to 24 hours. However, it is preferably formed by the following method <1> or <2>.

<1>: After applying the liquid thermosetting resin (a1) to the waterproof layer, the granular thermoplastic resin (a2) is liquid thermosetting before the applied liquid thermosetting resin (a1) is cured. A method in which coating is performed on the resin (a1) and then the liquid thermosetting resin (a1) is cured.
<2>: Formed by coating the waterproof layer with a resin composition containing the liquid thermosetting resin (a1) and the granular thermoplastic resin (a2), and then curing the liquid thermosetting resin (a1). how to.

  With the above method <1>, the granular thermoplastic resin (a2) can be laid almost uniformly on the liquid thermosetting resin (a1), so that the recesses in the thermosetting resin layer are almost uniform. Can be formed. Moreover, if it is the method of said <2>, the process at the time of forming an contact bonding layer can be simplified.

In the methods <1> and <2> above, the coating amount of the liquid thermosetting resin (a1) needs to be 0.4 to ² kg / m ² and 0.5 to 1.5 kg / m ^{2. 2} is preferable, and 0.6 to 1.2 kg / m ² is more preferable. If the coating amount of the liquid thermosetting resin (a1) is within the above range, the concave portion where the asphalt pavement material can easily enter can be formed in the thermosetting resin layer. Effectively exerted, the adhesion between the asphalt layer and the adhesive layer becomes strong.

The coating amount of the particulate thermoplastic resin (a2) is required to be 0.2~2kg / ^{m 2,} preferably 0.4~1.5kg / ^{m 2,} 0.5~1.2kg / M ² is more preferable. If the coating amount of the granular thermoplastic resin (a2) is within the above range, it becomes easy to form a concave concave portion in which the asphalt pavement material easily enters in the thermosetting resin layer, so that an adhesive force due to the anchor effect is obtained. And the adhesive force between the asphalt layer and the adhesive layer becomes stronger.

  In the method <1>, the method for applying the liquid thermosetting resin (a1) is not particularly limited as long as it can be uniformly applied on the waterproof layer. For example, the method of coating using a gold iron, a comb iron, etc. are mentioned. Moreover, the coating method of granular thermoplastic resin (a2) does not have limitation in particular, What is necessary is just a method which can be applied so that it may sink uniformly in liquid thermosetting resin (a1) before hardening. For example, the method etc. which are spread | dispersed uniformly from upper part using a soot etc. are mentioned. Moreover, it is preferable to apply the granular thermoplastic resin (a2) before the curing of the thermosetting resin starts, that is, immediately after the coating, usually within 10 minutes.

  In the above method <2>, the resin composition used when forming the adhesive layer is 10 to 80% by mass of the liquid thermosetting resin (a1) and 90 to 20% by mass of the granular thermoplastic resin (a2). It is preferably contained and used, more preferably 20 to 70% by mass of the liquid thermosetting resin (a1) and 80 to 30% by mass of the granular thermoplastic resin (a2). If the contents of the liquid thermosetting resin (a1) and the granular thermoplastic resin (a2) are within the above ranges, the asphalt pavement material can easily enter the thermosetting resin layer when the asphalt pavement material is laid. Since it becomes easy to form a recessed part, adhesiveness with an asphalt layer improves. Moreover, the coating method of a resin composition does not have limitation in particular, What is necessary is just a method which can apply uniformly on a waterproof layer. For example, after the liquid thermosetting resin (a1) and the granular thermoplastic resin (a2) are uniformly mixed with a hand mixer or the like, a curing agent is added, and coating is performed using a gold iron or the like.

  The liquid thermosetting resin (a1) used for forming the adhesive layer is a resin material that can retain its shape without being melted by the heat of the asphalt pavement material when it is laid, after being cured. It is a room-temperature curable liquid composition containing a liquid monomer. When this liquid thermosetting resin (a1) is mixed with the granular thermoplastic resin (a2), when the asphalt pavement material is laid, the concave portion where the asphalt pavement material easily enters is formed into a layer of the thermosetting resin. It is formed to strengthen the adhesion between the asphalt layer and the adhesive layer. Accordingly, since the primer containing a large amount of solvent cures while containing the solvent, the shape cannot be maintained and a strong uneven structure cannot be formed. Therefore, as the liquid thermosetting resin (a1) in the present invention Is not suitable for use. The liquid thermosetting resin (a1) does not contain a solvent that is supposed to be volatilized, or the solvent content needs to be 10% by mass or less.

  Specific examples of the liquid thermosetting resin (a1) include urethane resin, urea resin, unsaturated polyester resin, thermosetting acrylic resin, vinyl ester resin, diallyl phthalate resin, curable composition comprising polybutadiene hydroxide and isocyanate. Preferably, a thing, an epoxy resin, furan resin, etc. are mentioned. These can be appropriately selected so that the adhesiveness with the waterproof layer is good.

  For example, when the waterproof layer is a waterproof coating layer made of a urethane resin coating material, the liquid thermosetting resin (a1) is preferably a thermosetting acrylic resin, an unsaturated polyester resin, or a vinyl ester resin. These can mix a granular thermoplastic resin (a2) easily. These are cured by adding a curing agent such as an organic peroxide and dissolving it, but after a certain period of time, for example, by utilizing a redox reaction such as an organic peroxide-tertiary amine as a curing system, It can be easily cured at room temperature to form an adhesive layer. Among these, thermosetting acrylic resins are particularly preferable because they are excellent in low temperature curability and excellent in workability even at low temperatures.

  As the thermosetting acrylic resin used as the liquid thermosetting resin (a1), a (meth) acrylic resin is dissolved in an acrylic monomer having a polymerizable double bond such as an acrylic ester or a methacrylic ester to form a crosslinking property. Specific examples include liquid compositions containing monomers and the like.

  As an unsaturated polyester resin used as the liquid thermosetting resin (a1), a polybasic acid component obtained by adding a saturated dibasic acid to an unsaturated dibasic acid as necessary, and a polyhydric alcohol component are conventionally used. Specific examples thereof include a liquid composition obtained by mixing or dissolving a product obtained by condensation reaction with a normally polymerizable monomer. Examples of the unsaturated dibasic acid include maleic acid, maleic anhydride, fumaric acid and the like. Examples of the saturated dibasic acid include phthalic acid, phthalic anhydride, isophthalic acid, terephthalic acid, adipic acid, tetrahydrophthalic anhydride, and the like. Examples of the polyhydric alcohol component include dipropylene glycol, tripropylene glycol, 1,3-butanediol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, and ethylene oxide adduct of bisphenol A. It is done. Examples of polymerizable monomers include aromatic vinyl monomers such as styrene, α-methylstyrene, α-chloromethylstyrene, vinyltoluene, divinylbenzene, diallyl phthalate, and diallylbenzenephosphonate; vinyl esters such as vinyl acetate and vinyl adipate. Monomers: methyl (meth) acrylate, ethyl (meth) acrylate, (meth) acrylate, butyl (meth) acrylate, β-hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, (di) ethylene glycol di (meth) ) Acrylate, propylene glycol (di) ethylene glycol (meth) acrylate, trimethylolpropane di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol La (meth) acrylate, pentaerythritol hexa (meth) acrylate, tris (hydroxyethyl) tri (meth) acrylate isocyanurate, (meth) equal acrylic monomer; include triallyl cyanurate and the like.

  The vinyl ester resin used as the liquid thermosetting resin (a1) includes an epoxy compound having at least one epoxy group in the molecule and an unsaturated carboxylic acid having at least one polymerizable unsaturated group in the molecule ( For example, a liquid composition obtained by mixing or dissolving a product obtained by subjecting (meth) acrylic acid or the like) to an addition reaction in the presence of a catalyst, usually in a polymerizable monomer can be given as a specific example. Examples of the epoxy compound include bisphenol type epoxy resins (for example, those obtained by reacting bisphenols such as bisphenol A, bisphenol F, bisphenol S, and tetrabromobisphenol A with epichlorohydrin and / or methyl epichlorohydrin, or glycidyl of bisphenol A. And the like obtained by reacting a condensate of ether and the above bisphenol with epichlorohydrin and / or methyl epichlorohydrin), biphenyl type epoxy resin (for example, obtained by reacting biphenol with epichlorohydrin and / or methyl epichlorohydrin, etc.) ). Examples of the unsaturated monocarboxylic acid include (meth) acrylic acid, crotonic acid, cinnamic acid and the like. Examples of polymerizable monomers include aromatic vinyl monomers such as styrene, α-methylstyrene, α-chloromethylstyrene, vinyltoluene, divinylbenzene, diallyl phthalate, and diallylbenzenephosphonate; vinyl such as vinyl acetate and vinyl adipate. Ester monomers: methyl (meth) acrylate, ethyl (meth) acrylate, (meth) acrylate, butyl (meth) acrylate, β-hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, (di) ethylene glycol di ( (Meth) acrylate, propylene glycol (di) ethylene glycol (meth) acrylate, trimethylolpropane di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol Tiger (meth) acrylate, pentaerythritol hexa (meth) acrylate, tris (hydroxyethyl) tri (meth) acrylate isocyanurate, (meth) equal acrylic monomer; include triallyl cyanurate and the like.

  In the present invention, the viscosity of the liquid thermosetting resin (a1) at 23 ° C. is preferably 50 to 10,000 mPa · S, and more preferably 100 to 1,000 mPa · S. When the viscosity is 50 mPa · S or more, thick coating is possible without flowing out of the waterproof layer before the liquid thermosetting resin (a1) is cured. Moreover, if it is 10,000 mPa * S or less, coating property is favorable and a granular thermoplastic resin (a2) can be disperse | distributed uniformly.

  The granular thermoplastic resin (a2) used for forming the adhesive layer is a granular resin material that melts with the heat of the asphalt pavement when the asphalt pavement is laid, and is not particularly limited. The shape of the granular thermoplastic resin (a2) is not particularly limited as long as it has a granular shape, and examples thereof include spheres, beads, pellets, chips, and grams.

  Specific examples of the granular thermoplastic resin (a2) include ethylene vinyl acetate copolymer thermoplastic elastomer, ethylene- (meth) acrylic acid copolymer thermoplastic elastomer, ethylene- (meth) acrylic acid ester copolymer thermoplastic. Elastomers and their saponified or modified products, polystyrene, polystyrene resins such as acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile-styrene copolymer (AS), styrene-isobutylene-styrene copolymer (SIS) Styrene-based thermoplastic elastomers such as styrene-ethylene-butadiene-styrene copolymer (SEBS), styrene-butadiene-styrene copolymer (SBS), and methyl methacrylate-butadiene-styrene copolymer (MBS), ethylene-propylene (EPR), ethylene-butylene rubber (EBR), ethylene-based thermoplastic elastomers such as ethylene-propylene-diene rubber (EPDM), polyester-based, polyether-based thermoplastic polyurethane, heat such as methyl methacrylate resin (PMMA) A plastic acrylic resin is mentioned. These can be appropriately selected and used according to the type of the liquid thermosetting resin (a1), and those having a slight solubility in the liquid thermosetting resin (a1) can be selected and used. preferable. Specifically, a thermosetting acrylic resin, a polyester resin and a vinyl ester resin are used as the liquid thermosetting resin (a1), and an ethylene vinyl acetate copolymer thermoplastic elastomer as the granular thermoplastic resin (a2), It is preferable to use a styrenic thermoplastic elastomer.

  As the granular thermoplastic resin (a2), it is preferable to use a resin having a slight solubility in the liquid thermosetting resin (a1). In this case, since the liquid thermosetting resin (a1) is cured in a state where a part of the surface of the granular thermoplastic resin (a2) is dissolved in the liquid thermosetting resin (a1), the granular thermoplastic resin and the thermosetting resin are cured. An adhesive layer in which the resin is firmly adhered is formed. For this reason, even if the granular thermoplastic resin (a2) does not melt sufficiently when laying the asphalt pavement material, for example, when the outside air temperature is low, such as in winter, the partially molten granular thermoplastic resin and asphalt Adhesive strength between the pavement material and adhesive strength by fusion bonding of the granular thermoplastic resin and thermosetting resin is ensured, so that these work synergistically, and the asphalt layer and adhesive layer are stronger Glued to.

  The average particle diameter of the granular thermoplastic resin (a2) needs to be 0.5 to 7 mm, and preferably 1 to 5 mm. If the average particle diameter is 0.5 mm or more, when laying asphalt pavement, it becomes easy to form a concave recess in the thermosetting resin layer, it becomes easy to obtain an adhesive force due to the anchor effect, and the asphalt layer Improves the adhesion. Moreover, if an average particle diameter is 7 mm or less, it will become easy to apply | coat, disperse | distributing a granular thermoplastic resin (a2) uniformly.

  60-250 degreeC is preferable and, as for the softening point of a granular thermoplastic resin (a2), 80-180 degreeC is more preferable. If the softening point is 60 ° C. or higher, problems such as blocking hardly occur and the granular shape can be maintained. Furthermore, when integrated with the asphalt pavement material, the heat resistance of the layer in which the asphalt pavement material and the granular thermoplastic resin are integrated can be improved. Also, if the softening point is 250 ° C. or lower, the asphalt pavement material melts or flows quickly when laid, so that the asphalt pavement material and the granular thermoplastic resin are integrated into the recessed portion of the thermosetting resin. Adhesive strength due to the anchor effect and adhesive strength due to the integration of the asphalt pavement material and a part of the molten granular thermoplastic resin are effectively exhibited. In addition, in this invention, a softening point means the softening point by the ring and ball method measured based on JISK6863.

  1-800 g / 10min is preferable and, as for the melt flow rate of a granular thermoplastic resin (a2), 2-600 g / 10min is more preferable. When the melt flow rate is 800 g / 10 min or less, loss due to outflow from the construction end portion is less likely to occur when the asphalt pavement is laid. Further, if the melt flow rate is 1 g / 10 min or more, the asphalt pavement material melts or flows quickly when laid, so the asphalt pavement material and the granular thermoplastic resin are integrated to form a concave recess in the thermosetting resin. Adhesive strength due to the anchor effect due to penetration and adhesive strength due to the integration of a part of the asphalt pavement material and the molten granular thermoplastic resin are effectively exhibited. In the present invention, the melt flow rate means a melt flow rate defined by JIS-K-7210, and indicates the amount of resin per 10 minutes flowing from a cylinder at 190 ° C. and a load of 2.16 kgf.

  In the present invention, the granular thermoplastic resin (a2) is preferably used in combination of two or more different softening points or two or more different melt flow rates.

  By using two or more types of granular thermoplastic resins having different softening points and melt flow rates as the granular thermoplastic resin (a2), a granular thermoplastic resin having a low softening point and a low melt viscosity can be used when laying asphalt pavement materials. Since the granular thermoplastic resin is easy to flow, the entire asphalt pavement material and the asphalt pavement material are easily integrated, and an adhesive force due to the anchor effect is easily obtained. The granular thermoplastic resin with a high softening point and the granular thermoplastic resin with a high melt viscosity are partly melted and integrated with the asphalt pavement, and the remaining part without melting is a layer of a thermosetting resin. And firmly adhere. For this reason, these adhesive forces act synergistically at a wide range of pavement temperatures of about 100 to 170 ° C. assumed during asphalt paving, and good adhesive strength is expressed between the waterproof layer and the asphalt layer.

  When two or more kinds of granular thermoplastic resins having different softening points are used in combination as the granular thermoplastic resin (a2), a low softening point thermoplastic resin (a21) having a softening point of 60 to 100 ° C., and the softening point thermoplasticity It is particularly preferable to use in combination with a high softening point thermoplastic resin (a22) which is 10 to 150 ° C. higher than the softening point of the resin.

  In addition, when two or more types having different melt flow rates are used in combination as the granular thermoplastic resin (a2), a low melt viscosity thermoplastic resin (a21 ′) having a melt flow rate of 100 to 800 g / 10 min and a melt flow rate of It is particularly preferable to use in combination with a high melt viscosity thermoplastic resin (a22 ′) of 1 to 100 g / 10 min.

  Since the low softening point thermoplastic resin (a21) and the low melt viscosity thermoplastic resin (a21 ′) are easily integrated with the asphalt pavement material, the strength and heat resistance of the layer close to the bonding interface of the asphalt pavement material are improved. be able to.

  Further, the adhesive layer may further contain solid substances such as cinnabar sand, slag, and alumina particles.

In the asphalt pavement method of the present invention, a primer is applied to the waterproof layer prior to forming the adhesive layer by applying the liquid thermosetting resin (a1) and the granular thermoplastic resin (a2) to the waterproof layer. Thus, it is preferable to interpose the second primer layer between the waterproof layer and the adhesive layer. By forming the second primer layer on the waterproof layer, the adhesion between the waterproof layer and the adhesive layer is improved. There is no limitation in particular as a primer which forms a 2nd primer layer, According to the kind of waterproof layer, it can change suitably. For example, in the case where the waterproof layer is a waterproof coating layer made of a urethane resin coating material, a urethane primer is preferably used. Examples of the urethane-based primer include a moisture-curable one-component solvent-type urethane primer, a two-component solvent-free urethane primer, a two-component solvent-type urethane primer, and a two-component epoxy-modified urethane primer. The coating amount of the primer is preferably ^{0.03~0.3kg / m 3, 0.05~0.2kg / m} 3 and more preferably.

  Then, the liquid thermosetting resin (a1) and the granular thermoplastic resin (a2) are applied to the waterproof layer and cured for 1 to 24 hours to cure the liquid thermosetting resin (a1) to form an adhesive layer. After that, asphalt pavement heated to 140-170 ° C. is laid.

  In the adhesive layer thus formed, the granular thermoplastic resin in the layer is covered and fixed with a thermosetting resin. The thermosetting resin is concentrated and hardened on the side and bottom of the granular thermoplastic resin, but the upper surface of the granular thermoplastic resin exists in an extremely thin shell shape. For this reason, when a heated asphalt pavement material is laid, the thermosetting resin layer in the adhesive layer retains its shape without flowing due to the heat from the asphalt pavement material. Breaks or melts the shell covered with the thermosetting resin by the heat from the asphalt pavement and the pressure due to the rolling, and the whole or a part of the asphalt pavement is integrated. When the asphalt pavement is integrated with the entire thermoplastic resin, the asphalt pavement material enters the portion where the granular thermoplastic resin was present, that is, into the concave recess of the thermosetting resin layer, thereby providing an anchor effect. Demonstrate adhesion. In the case of partial integration, the asphalt pavement material is firmly bonded by exhibiting the adhesive force between the asphalt pavement material and the granular thermoplastic resin and between the granular thermoplastic resin and the thermosetting resin. As a result, the asphalt layer does not easily swell or partially peel off, and an asphalt pavement structure having excellent durability with respect to running of a vehicle or the like can be formed on the base.

  Further, at least one selected from thermosetting acrylic resin, unsaturated polyester resin, and vinyl ester resin is used as the liquid thermosetting resin (a1), and ethylene vinyl acetate copolymer thermoplastic is used as the granular thermoplastic resin (a2). When the adhesive layer is formed using at least one selected from an elastomer and a styrene-based thermoplastic elastomer, the granular thermoplastic resin is slightly dissolved in the thermosetting resin, so that the granular thermoplastic resin and the thermosetting resin are bonded. Power is strengthened. For this reason, when the outside air temperature is low such as in winter, the granular thermoplastic resin may not be sufficiently melted, but even in such a case, the adhesion between the granular thermoplastic resin and the thermosetting resin may be difficult. By synergistically exerting the force and the adhesive force between the partially molten granular thermoplastic resin and the asphalt pavement material, the adhesive force between the asphalt layer and the adhesive layer is improved as a whole.

  The heated asphalt pavement material is usually laid in two layers in the order of a base layer portion and a surface layer portion by a conventional method on a waterproof layer having an adhesive layer coated on the upper surface. Each thickness is 70 mm or less, and the same thickness is applied in the present invention.

  The asphalt pavement structure obtained in this way has an asphalt layer firmly bonded, is not prone to partial peeling or swelling, is excellent in waterproofness, and is excellent in traveling such as a vehicle. It has durability.

  EXAMPLES Hereinafter, although an Example (Examples 1-9) and a comparative example (Examples 10-14) are given and this invention is demonstrated concretely, this invention is not limited to these.

(Example 1)
A two-pack type urethane resin primer (Sun PC-U2; made by AGC polymer building material) is 0.2 kg / m ² at room temperature on a concrete plate for paving (JIS A5304: 300 × 300 × 60 mm) whose surface is polished with a sander. A base primer layer was formed by coating at a rate and curing for 3 hours.
Next, a rapid curing polyurethane resin (trade name: “Rimspray F-1000 AGC polymer building material”) is applied onto the substrate primer layer, and a coating device (product name: “H-20 spray machine”) Gasmer wearing a prober gun. The product was sprayed to form a 2 mm thick coating and cured for 1 hour to form a waterproof layer.
Next, on the waterproof layer, a one-component moisture-curing urethane primer (trade name: “Sun PC” manufactured by AGC polymer building material) is applied at a rate of 0.1 kg / m ² and cured for 1 hour. A primer layer was formed.
Next, on the second primer layer, a liquid thermosetting acrylic resin (trade name: “Silcal MC2N” manufactured by Mitsui Chemicals) and a pellet-like ethylene / vinyl acetate copolymer (trade name: “Evaflex”) EV150 "made by Mitsui DuPont Polychemical Co., Ltd. Softening point 120 ° C Melt flow rate: 30g / 10min Particle size: 3-5mm) is mixed at a mass ratio of 1: 1, and a curing agent (50% dibenzoyl peroxide) is mixed with acrylic resin. 5 parts by mass with respect to 100 parts by mass, an adhesive dissolved by stirring is distributed on the waterproof layer, uniformly applied with a gold trowel, and applied to a coating amount of 1.5 kg / m ² for 1 hour. The adhesive was cured by curing to form an adhesive layer.
Next, on the adhesive layer, heat to 170 ° C and mix the asphalt pavement material (using modified II asphalt, dense particle size, aggregate maximum particle size of 13 mm) and press with a plate compactor to a thickness of 4 cm. The asphalt layer was formed by hardening, and the asphalt pavement structure of Example 1 was obtained.

(Example 2)
In Example 1, the asphalt pavement structure of Example 2 was obtained in the same manner as in Example 1 except that the one-component moisture-curing urethane primer was not used and the second primer layer was not formed.

(Example 3)
In Example 1, on the second primer layer, a liquid unsaturated polyester resin (product name: “Remaster M” manufactured by Mitsui Chemicals) and a pellet-like ethylene vinyl acetate copolymer (trade name: “Eva” Flex EV150 "Made by Mitsui DuPont Polychemical Softening point: 120 ° C Melt flow rate: 30 g / 10 min Particle size: 3-5 mm) are mixed at a mass ratio of 1: 1, and a curing agent (methyl ethyl ketone peroxide) is unsaturated polyester resin Distribute the adhesive obtained by adding 1 part by mass to 100 parts by mass, apply it with a gold trowel, apply it to a coating amount of 1.5 kg / m ^2, and cure for 3 hours to bond the adhesive layer The asphalt pavement structure of Example 3 was obtained in the same manner as Example 1 except that was formed.

(Example 4)
In Example 1, instead of a pellet-shaped ethylene vinyl acetate copolymer (trade name: “Evaflex EV150” manufactured by Mitsui DuPont Polychemical) on the second primer layer, a pellet-shaped ethylene vinyl acetate copolymer ( Product name: “Evaflex V5772ET”, made by Mitsui DuPont Polychemical, softening point: 80 ° C., melt flow rate: 400 g / 10 min, particle size: 3 to 5 mm) and pelletized ethylene vinyl acetate copolymer (product name: “Eva” Flex EV560 "Made by Mitsui DuPont Polychemical Softening point: 180 ° C, Melt flow rate: 3.5g / 10min Particle size: 3-5mm) Adhesive using granular thermoplastic resin dry blended at a ratio of 1: 1 distribute, 1:00 and smeared as the coating amount to uniformity by gold iron is 1.5 kg / m ² Cured to form an adhesive layer, except that the asphalt pavement material (modified type II asphalt) heated to 170 ° C. and mixed on the adhesive layer was cooled to 110 ° C. to form an asphalt layer, The asphalt pavement structure of Example 4 was obtained in the same manner as Example 1.

(Example 5)
In Example 1, the asphalt pavement structure of Example 5 was obtained in the same manner as in Example 1 except that the amount of adhesive applied was 1.0 kg / m ² .

(Example 6)
The asphalt pavement structure of Example 6 was obtained in the same manner as in Example 1 except that the amount of adhesive applied was 3.0 kg / m ² in Example 1.

(Example 7)
In Example 1, 5 parts by mass of a curing agent (50% dibenzoyl peroxide) is added to 100 parts by mass of a thermosetting acrylic resin (trade name: “Silcal MC2N” manufactured by Mitsui Chemicals) on the second primer layer. In addition, a liquid thermosetting resin dissolved by stirring was distributed and applied uniformly with a gold iron so that the coating amount was 0.75 kg / m ² . Thereafter, before the liquid thermosetting resin is cured, a pellet-like ethylene / vinyl acetate copolymer (trade name: “Evaflex EV150”, made by Mitsui DuPont Polychemical, softening point: 120 ° C. Melt flow rate: 30 g / 10 min : 3-5 mm) was uniformly sprayed to 0.75 kg / m ² and cured for 1 hour to cure the liquid thermosetting resin to form an adhesive layer. An asphalt pavement structure was obtained.

(Example 8)
In Example 1, instead of pellet-form ethylene vinyl acetate copolymer (Mitsui DuPont Polychemical) on the second primer layer, pellet-form styrene-butadiene-styrene block polymer (trade name: “Tufprene A”) Asahi Kasei Chemicals' melt flow rate: 2.6 g / 10 min particle size: 3-5 mm) is distributed and applied with a gold iron so that the coating amount is 1.5 kg / m ^2. An asphalt pavement structure of Example 8 was obtained in the same manner as in Example 1 except that the adhesive was formed by curing for 1 hour.

(Example 9)
In Example 1, on the second primer layer, a liquid thermosetting acrylic resin (trade name: “Silcal MC2N” manufactured by Mitsui Chemicals) and a pellet-like ethylene / vinyl acetate copolymer (trade name: “Eva” Flex EV150 "Made by Mitsui DuPont Polychemical Softening point 120 ° C Melt flow rate: 30g / 10min Particle size: 3-5mm) is mixed at a mass ratio of 3: 1 and curing agent (50% dibenzoyl peroxide) is acrylic resin Distribute 5 parts by mass with 100 parts by mass of the adhesive dissolved by stirring, apply it uniformly with a gold iron so that the coating amount is 1.0 kg / m ^2, and cure for 1 hour to apply the adhesive. The asphalt pavement structure of Example 9 was obtained in the same manner as in Example 1 except that the adhesive layer was formed by curing.

(Example 10)
In Example 1, immediately after applying a one-component moisture-curing primer (trade name: “Sun PC” AGC polymer building material) on the waterproof layer at a rate of 0.15 kg / m ² , pellet-shaped ethylene Vinyl acetate copolymer (trade name: “Evaflex EV150”, made by Mitsui DuPont Polychemical, softening point 120 ° C., melt flow rate: 30 g / 10 min, particle size: 3 to 5 mm) is uniformly sprayed to 0.75 kg / m ^2. Then, an asphalt pavement structure of Example 10 was obtained in the same manner as in Example 1 except that the adhesive layer was formed by curing for 24 hours.

(Example 11)
In Example 1, immediately after applying a one-component moisture-curing primer (trade name: “Sun PC” AGC polymer building material) on the waterproof layer at a rate of 0.5 kg / m ² , pellet-shaped ethylene Vinyl acetate copolymer (trade name: “Evaflex EV150”, made by Mitsui DuPont Polychemical, softening point 120 ° C., melt flow rate: 30 g / 10 min, particle size: 3 to 5 mm) is uniformly sprayed to 0.75 kg / m ^2. Then, an asphalt pavement structure of Example 11 was obtained in the same manner as in Example 1 except that the adhesive layer was formed by curing for 24 hours.

(Example 12)
In Example 1, instead of pelletized ethylene vinyl acetate copolymer (trade name: “Evaflex EV150” manufactured by Mitsui DuPont Polychemical) on the second primer layer, powdered styrene / butadiene / styrene block Distribute the adhesive (product name: "Asaprene T-475" made by Asahi Kasei Chemicals, softening point 225 ° C, melt flow rate: 0.7g / 10min, particle size 0.1-0.5mm), uniform with a gold iron The asphalt pavement structure of Example 12 was obtained in the same manner as in Example 1 except that the coating amount was 1.5 kg / m ² and the adhesive was formed by curing for 1 hour.

(Example 13)
In Example 1, on the second primer layer, a liquid thermosetting acrylic resin (trade name: “Silcal MC2N” manufactured by Mitsui Chemicals) and a pellet-like ethylene / vinyl acetate copolymer (trade name: “Eva” Flex EV150 "Made by Mitsui DuPont Polychemical Softening point 120 ° C Melt flow rate: 30g / 10min Particle size: 3-5mm) is mixed at a mass ratio of 1: 5, and curing agent (50% dibenzoyl peroxide) is acrylic resin Distribute 5 parts by mass to 100 parts by mass and distribute the stirred and dissolved adhesive, apply it uniformly with a gold iron so that the coating amount is 0.9 kg / m ^2, and cure for 1 hour. The asphalt pavement structure of Example 13 was obtained in the same manner as Example 1 except that the adhesive layer was formed by curing.

(Example 14)
In Example 1, on the second primer layer, a liquid thermosetting acrylic resin (trade name: “Silcal MC2N” manufactured by Mitsui Chemicals) and a pellet-like ethylene / vinyl acetate copolymer (trade name: “Eva” Flex EV150 "made by Mitsui DuPont Polychemical Co., Ltd. Softening point 120 ° C Melt flow rate: 30g / 10min Particle size: 3-5mm) are mixed at a mass ratio of 7.5: 1, and a curing agent (50% dibenzoyl peroxide) 5 parts by mass with respect to 100 parts by mass of the acrylic resin, distribute the adhesive obtained by stirring and dissolving, apply uniformly with a gold iron so that the coating amount becomes 0.85 kg / m ^2, and 1 hour An asphalt pavement structure of Example 14 was obtained in the same manner as in Example 1 except that the adhesive layer was formed by curing and curing the adhesive.

  After curing the asphalt pavement structure of Examples 1 to 14 for one week, it was cut out to a size of 100 × 100 mm with a concrete cutter, and a tensile adhesion test was performed according to JHERI 410-11 (Japan Highway Public Corporation Research Institute Standard). went. The results are shown in Table 1.

From the above results, the 0.4~2kg / ^{m 2} the liquid thermosetting resin, a particulate thermoplastic resin having an average particle diameter of 0.5~7mm formed by coating a 0.2~2kg / ^{m 2} The asphalt pavement structures of Examples 1 to 9 in which the waterproof layer and the asphalt layer were bonded via the adhesive layer had high tensile adhesive strength, and excellent adhesion between the asphalt pavement material and the waterproof layer.

Claims (9)

0.4 to ² kg / m ^{2 of} a liquid thermosetting resin having a solvent content of 10% by mass or less selected from a thermosetting acrylic resin, an unsaturated polyester resin and a vinyl ester resin is applied to the waterproof layer formed on the substrate. And 0.2 to ² kg / m ² of a granular thermoplastic resin having an average particle diameter of 0.5 to 7 mm selected from ethylene vinyl acetate copolymer thermoplastic elastomer and styrene thermoplastic elastomer , An asphalt pavement method comprising: curing a thermosetting resin to form an adhesive layer, and then laying a heated asphalt pavement material on the adhesive layer to form an asphalt layer.   The adhesive layer, after applying the liquid thermosetting resin to the waterproof layer, supplies the granular thermoplastic resin before the liquid thermosetting resin is cured, and then the liquid thermosetting resin. The asphalt pavement method according to claim 1, wherein the asphalt pavement method is formed by curing.   The adhesive layer is formed by applying a resin composition including the liquid thermosetting resin and the granular thermoplastic resin to the waterproof layer and curing the liquid thermosetting resin. Asphalt paving method.   The asphalt pavement method according to claim 3, wherein the resin composition contains 10 to 80% by mass of the liquid thermosetting resin and 90 to 20% by mass of the granular thermoplastic resin. The asphalt pavement method according to any one of claims 1 to 4 , wherein a softening point of the granular thermoplastic resin is 60 to 250 ° C. The granular thermoplastic resin includes a low softening point thermoplastic resin having a softening point of 60 to 100 ° C and a high softening point thermoplastic resin having a softening point of 10 to 150 ° C higher than the softening point of the softening point thermoplastic resin. 5. The asphalt pavement method according to 5 . The asphalt pavement method according to any one of claims 1 to 6 , wherein a melt flow rate of the granular thermoplastic resin is 1 to 800 g / 10 min. Wherein the particulate thermoplastic resin is melt flow rate and a low melt viscosity thermoplastic resin 100 to 800 g / 10min, the melt flow rate according to claim 7 comprising a high melt viscosity thermoplastic resins 1 to 100 g / 10min Asphalt pavement method. The asphalt pavement method according to any one of claims 1 to 8 , wherein the waterproof layer is a urethane resin waterproof layer, and a urethane primer is applied to the waterproof layer before forming the adhesive layer.