JPS6137402B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a paving method that can be used for construction of ground surfaces for athletic fields, sports fields, tennis courts, etc. Relates to durable stadium paving methods.

[Conventional technology]

It has already been proposed to apply an anti-slip finish to all-weather stadiums made of synthetic resin. For example, Japanese Patent Publication No. 52-6540 discloses a method of spreading and fixing synthetic resin chips on the pavement surface before it hardens. Also, JP-A-49-
Publication No. 34132 discloses a method in which colored ceramics or colored natural aggregates are sprinkled on the pavement surface before hardening, and a binder is applied on top of this to increase the adhesive strength of the aggregates.

[Problem that the invention seeks to solve]

However, in the case of simply dispersing chips as shown in the conventional Japanese Patent Publication No. 52-654, the adhesion of the chips is weak, so the chips tend to peel off, and in addition, they are not suitable for the paved surface. Since the chips of a specific shape are attached in an exposed manner, dirt tends to accumulate in the gaps between the chips, and it is difficult to clean this dirt, resulting in the disadvantage that the paved surface quickly becomes slightly dirty.

Furthermore, the chip shown in JP-A No. 49-34132 uses colored ceramics or colored natural aggregate as the chip material, so it is not suitable for use as a spike, and the surface is coated with a binder to increase strength. Even if the height is increased, if spikes are used, the adhesion of the chips is weak and the coating with the binder is not effective because the chips are made of a hard and different material, and the chips easily peel off, reducing the durability of the gland. It has the disadvantage of being bad.

The present invention solves the above-mentioned drawbacks, has strong adhesion of chips, is highly durable even when spikes are used, and furthermore, it is difficult for dirt to remain on the pavement surface, and the remaining dirt can be removed easily. The purpose is to provide a paving method that can be cleaned and removed.

[Means to solve the problem]

The technical means of the paving method of the present invention is to construct paving with a polyurethane-based synthetic resin paving material on the base of the stadium, and after this paving material has hardened, a paving material of the same quality is poured on the paved surface at the same time. The purpose is to spray chips made of polyurethane synthetic resin, and then apply a polyurethane synthetic resin coating material to the upper surface of the chips to form a film-like coating layer with a thickness of 0.1 to 0.5 mm on the pavement surface.

In the present invention, the materials for the paving material, chips, and covering material are all polyurethane-based synthetic resins, but this polyurethane-based synthetic resin can be made using all known material systems, such as the prepolymer method, partial prepolymer method, and One-shot two-part urethane formulations, moisture-curable one-part urethane formulations, solution-type thermoplastic urethane formulations, urethane emulsion formulations, and the like can all be used freely. Further, as a coating method for coating the pavement surface, all known methods such as coating with a brush or roller, spray coating, flow coating, etc. can be used. The thickness of the coating layer is 0.1 to 0.5 mm. If the thickness of the coating is thinner than this, the effect of covering the chips cannot be sufficiently exerted, and if it is thicker than this, the unevenness of the ground surface will be reduced, and there will be no point in spreading the chips.

〔Effect of the invention〕

In the paving method of the present invention, the paving material, chips, and covering material are all made of polyurethane-based synthetic resin, so they have good mutual adhesion, and polyurethane has excellent strength, elasticity, and weather resistance, so it can be used for competitions. There is little peeling of chips due to the use of spikes, and the strength is particularly high against the use of spikes, allowing the ground plane to be maintained in good condition for a long period of time. Furthermore, since there is a coating layer on the outer surface of the chips, there is less dust and dirt remaining there, and it is easy to clean, so the paved surface can always be kept in a beautiful condition.
Chip effects are not reduced.

〔Example〕

Example 1 As component A of a polyurethane paving material, polyoxypropylene triol with an average molecular weight of 3000 and excess toluene diisocyanate (2.4-diisocyanate/2.
A prepolymer having a terminal isocyanate group content of 2.9% was produced by reacting the prepolymer with 6-isocyanate (80/20) in a conventional manner. In addition, methylene bis (0-
chloraniline) 75 parts, polyoxypropylene glycol with an average molecular weight of 2000 97 parts, filler 798 parts,
A formulation consisting of 300 parts of red iron paste, 20 parts of lead catalyst and 10 parts of weathering stabilizer was prepared.

After applying an epoxy primer to the cement concrete that had been poured as a base for an athletics stadium, a paving material made by stirring and mixing 100 parts of component A and 130 parts of component B was poured to create a 10 mm thick pavement. . After leaving it for about 10 hours, the above paving material was poured again, and at the same time, the paving material made from the same material with an average particle size of 4~
7mm brown chips were spread and the pavement was constructed to a thickness of 3mm.

Next, spray a material consisting of 100 parts of component A, 130 parts of component B, and 230 parts of solvent to a thickness of 0.2 mm using a spray gun.
Painted on. The resulting paved surface had less dirt due to dust and the like, was easy to clean, had less chip peeling and wear, and had an excellent usability.

Example 2 The paving material of Example 1 was poured onto asphalt concrete that had been cast as a foundation for an athletics stadium, and the pavement was constructed to a thickness of 10 mm. After leaving the resin for about 10 hours to harden, pour the above paving material again.
At the same time, the same chips as in Example 1 were sprinkled to a thickness of 3 mm.
The pavement was constructed.

Next, a one-component moisture-curable polyurethane paint was applied using a roller brush to obtain a paved surface similar to that in Example 1.

Example 3 100 parts of component A of Example 1, 130 parts of component B, 15 parts of Erosil #200 [trade name of Nippon Aerosil Co., Ltd., fine particulate silica], and clay were applied to the pavement surface after the chips of Example 1 had been sprayed. A mixture of 20 parts and 150 parts of a solvent (methyl ethyl ketone) was stirred and mixed and applied at a rate of about 300 g ^per square meter using a one-component airless spray machine.
The resulting paved surface is beautiful with a moderate matte effect, has little dirt from dust, etc., and is easy to clean.
Moreover, there was no peeling or abrasion of the chips, and the usability was excellent.

Example 4 Component A had a terminal isocyanate group content of 29.6% obtained by reacting trimethylolpropane with a large excess of tolylene diisocyanate in a conventional manner.
The average molecular weight of the partial prepolymer as B component is
2000 polyoxypropylene glycol, filler, lead catalyst, pigment, and stabilizer were used, and both components were mixed in a ratio such that the ratio of isocyanate groups to active hydrogen was 1.05. Thickness: 10
Paving was carried out in mm.

After about 10 hours, the above paving material was poured again, and at the same time brown chips made from the same material with an average particle size of 4 to 7 mm were sprinkled to form a pavement to a thickness of 3 mm.

Next, apply a 50% toluene solution of both components A and B above using a one-component airless spray machine to approximately 400 g per ¹ m2.
Painted to cover the pavement surface. The resulting paved surface had little dirt from dust and the like, was easy to clean, and had no peeling or abrasion of chips, giving it an excellent usability.

Claims (1)

[Claims] 1 Pave the stadium foundation with polyurethane synthetic resin paving material, and after this paving material has hardened,
At the same time, a paving material of the same quality is poured onto the pavement surface, and at the same time, chips made of polyurethane-based synthetic resin are sprinkled, and then a polyurethane-based synthetic resin coating material is applied to the upper surface, and the paved surface is coated with a thickness of 0.1 to 0.5 mm. A method for paving a stadium using all-weather spikes, characterized by forming a film-like covering layer.