JPH0827712A - Elastic paving method and manufacture of elastic surface layer - Google Patents

Abstract

PURPOSE:To provide an elastic pavement which is used mainly for sidewalks, deformed by load, and prevents solidification by freezing and snowing. CONSTITUTION:A silane-alcoholic mixture is applied onto hard pavement surfaces such as concrete, asphalt, etc., or hard paving plates comprising concrete slabs, etc. Also a mixture of aggregate comprising stone material and sand of 5mm or less in particle diameter, small pieces and powder of rubber, and uncured polyurethane is applied onto it. Then the polyurethane is cured. For this polyurethane, one-liquid moisture cured type polyurethane of which curing time is 6 to 24 hours is most appropriate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic pavement method for forming an elastic pavement used for the purpose of preventing icing and the like on a road surface on which a vehicle such as a road passes, and an elastic pavement used for this pavement method. The manufacturing method of the surface layer.

[0002]

2. Description of the Related Art Conventionally, chemicals have been used as a measure to prevent freezing of roads. This method is laborious and expensive to perform. Therefore, the present invention provides an anti-freezing measure that does not require trouble.

For this purpose, the inventor of the present application has already provided elasticity to the road surface and, even if the road surface is frozen, the surface is deformed by the weight of the traveling vehicle, thereby breaking the ice on the surface and smoothing the surface. A pavement was provided that was changed from an ice-burned state to a state in which sherbet-shaped small ice aggregates were formed (Japanese Patent Application No. 6-85204).

The above-mentioned pavement is mainly applied to roads on which vehicles travel and parking lots. Therefore, an object of the present invention is to provide an antifreezing measure that does not require labor, as in the above pavement, on a sidewalk such as a vehicle where deformation due to a large load cannot be expected.

[0005]

The first aspect of the present invention is to provide an elastic surface layer obtained by bonding a stone material having a particle size of 5 mm or less, an aggregate made of sand, and a small piece or powder of rubber with polyurethane by using concrete, asphalt. It is an elastic paving method that is provided by adhering to a hard paving surface such as.

A second aspect of the present invention is that a hard pavement plate made of concrete slab, etc. is provided with an elastic surface layer obtained by binding a stone material having a particle size of 5 mm or less, an aggregate made of sand, and a small piece or powder of rubber with polyurethane. It is an elastic paving method in which an elastic paving plate provided by being adhered to a sheet is spread.

A third aspect of the present invention is to apply a mixture of silane and alcohol to a hard pavement surface such as concrete or asphalt, or to a hard pavement plate such as a concrete slab.
This is a method for producing an elastic surface layer in which a mixture of a stone material having a particle size of 5 mm or less, an aggregate made of sand, a small piece or powder of rubber, and uncured polyurethane is applied thereon, and then the polyurethane is cured.

This polyurethane has a curing time of 6 to
A one-part moisture-curable polyurethane for 24 hours is suitable, and a silane / alcohol mixture in which an organic silane having an amine is mixed in alcohol in a proportion of 2 to 10% (weight ratio) is suitable.

[0009]

In the experiment conducted by the inventor of the present invention, it has been found that a very small deformation of the pavement surface is sufficient to prevent the formation of ice and snow. Therefore, the pavement according to the present invention can sufficiently prevent icing and the like even when there is no large deformation like that caused by a vehicle and only a very small deformation caused by a pedestrian or the like.

Next, the method for producing the elastic surface layer of the present invention will be specifically described.

First, concrete, a hard pavement surface or a hard pavement board is prepared as a base for forming an elastic surface layer. The hard pavement surface is a base for forming this elastic surface layer on site, and a normal road surface pavement such as concrete or asphalt may be used as it is. The hard pavement plate is mainly the base for forming this elastic surface layer in the factory for manufacturing the pavement plate,
It consists of paving boards such as concrete slabs, blocks, and tiles. Further, this pavement board can form this elastic surface layer even when it is already spread.

A mixture of silane and alcohol is applied to the surfaces of the hard paved surface and the hard paved board. This mixture is for good adhesion of the elastic surface layer. As the silane used here, those used for pretreatment in the production of composite materials using glass fibers and carbon fibers can be used as they are, and for example, organic silane having an amine can be used. This silane is used by mixing with an alcohol such as industrial alcohol or modified alcohol in an amount of 2 to 10% (weight ratio). The amount used may be so small that the surface is once wet, and may be 200 g or less per square meter, and usually 100 g or less is sufficient. The method of application is arbitrary, but it is convenient to use a sprayer because a very small amount is applied.

Separately, a mixture of a stone material having a particle size of 5 mm or less, an aggregate made of sand, a small piece or powder of rubber, and uncured polyurethane is prepared. Stones and sand are important for securing the strength and abrasion resistance of the finished pavement, and are exposed on the surface to prevent slipping. It is desirable that the stones have the function of meshing with each other to disperse the load.
A sharp and hard material such as crushed stone is suitable, and the size is about 1 to 5 mm, preferably about 1 to 3 mm. The sand fills the space between the stone materials to transfer the load and enhances the hardness of the entire pavement. Rubber gives pavement elasticity,
It is exposed on the surface and has an anti-slip effect, and is formed into small pieces or powder so as to be distributed throughout. Size is 2
It is advisable to use a mixture of large particles of about 4 mm and fine particles of 1 mm or less. This rubber may be either natural rubber or synthetic rubber, and it is possible to use the one formed by crushing waste tires and the like. Polyurethane is stone,
It combines sand and rubber. Details will be described later.

The proportion of each of these components is generally stone, sand,
It is preferable that the weight ratio of rubber and polyurethane is approximately equal, that is, about 1: 1: 1: 1. This proportion is, of course,
It can be changed, especially the proportion of stone, sand, and rubber can be changed according to the particle size, required strength, hardness, elasticity, etc., and should be adjusted to about 1/2 or 2 times the above. Can easily. Since polyurethane is used to bond stones, sand, and rubber, it is appropriate to fill the gaps and prevent the excess, and the specific ratio may be determined by experiments. Excessive polyurethane causes a decrease in strength, but only to a small extent,
Rather, it is more expensive than other materials, and the economic disadvantage is a major drawback.

For mixing, as in the case of asphalt pavement, a patch-type asphalt plant of pug mill type can be used as it is. Of course, other mixing devices can be used. At this time, each material is usually at room temperature,
Depending on the nature of polyurethane, stone material with a large heat capacity,
It is good to heat sand.

The mixture is then applied on the surface. Various methods such as iron coating can be used for this coating.
When applying to the pavement surface, conventional pavement laying machines can be used. The thickness of this surface layer can be set arbitrarily, but is suitably about 5 to 15 mm. Rolling is not essential, but rolling with a lightweight roller is effective because it evens the surface and strengthens the mechanical interlocking of the internal aggregate and rubber.

It is important that the polyurethane used in the present invention has no bubbles inside when cured. The presence of air bubbles may reduce the strength of the aggregate and cause the aggregate to be separated or separated. Polyurethane generates carbon dioxide during curing, and has a property of easily generating bubbles. Therefore, in the present invention, it is necessary that the amount of carbon dioxide generated is small and the generated carbon dioxide is satisfactorily released to the outside.

Polyurethanes satisfying such requirements are one-component water-curing type, especially curing time of 30 minutes to 4 minutes.
Those of 8 hours, preferably 6 to 24 hours are suitable. The two-part type cures rapidly and thus causes bubbles. The moisture-curing type is convenient in use because it gradually hardens due to the moisture contained in the air, stone materials, sand, or the like. When the curing time is set as described above, the generation of carbon dioxide becomes gradual, the carbon dioxide is satisfactorily released to the outside, and bubbles are not generated. If the curing is excessively slow, it will be inconvenient for construction. To set the cure time as above, set the isocyanate content to 20
It is preferable that the weight percent is not more than. Further, the curing rate can be adjusted by using various commercially available additives. The specific components of the polyurethane are not particularly limited, but for example, poly-prepolymer-isocyanate and xylene are polyadded or cross-linked, that is, tetramethyl-xylene-di-isocyanate. Can be used.

When left as such, the polyurethane is cured by the moisture in the air to form an elastic surface layer. Since this elastic surface layer is treated with silane, it is well adhered to the hard pavement surface and the surface of the hard pavement board.

When the above-described method for producing an elastic surface layer is applied to a hard pavement surface such as concrete or asphalt, the first elastic pavement method of the present invention is obtained.

Further, the method for producing an elastic surface layer is applied to a hard paving board made of concrete slab or the like, and the paving board is spread over to form a second elastic paving method of the present invention.

In the above description, the elastic surface layer is bonded by polyurethane at the same time, but it may be bonded by using a separate adhesive.

[0023]

EXAMPLES The present invention will be specifically described below with reference to examples.

A silane / alcohol mixture is prepared by mixing 5% (weight ratio) of an organic silane having an amine with an industrial alcohol. On the existing concrete pavement surface,
Using a sprayer, mix this mixture with 10
Apply at a rate of 0 grams.

Separately, the following ratios (weight ratios) of the following materials were used.
Mix with. Stone material (average particle size 2 mm) 30% Sand 25% Rubber (small pieces (average particle size 1.4 mm) and powder) 25% Polyurethane 20% Polyurethane used here is, for example, "Polytan (P
"Olytan""(trademark) (Potan, Germany)
lytan)). In addition to this, an additive that accelerates curing and suppresses the generation of carbon dioxide, for example, "INCOREZ 700" (trademark)
(Industrial Copolymers, UK
trial Polymers Ltd. ) Company)
Is added in an appropriate amount to adjust the curing time to 24 hours before use. The proportion of polyurethane is 10 to 30% by weight.
You can change the degree.

10 m of the above mixture on the paved surface
Apply with a thickness of m.

When left for about 24 hours, the curing is completed,
At the same time, it adheres to the paved surface.

[0028]

As described above, the pavement formed by the present invention uses rubber pieces, powder, and polyurethane and has elasticity, so that the surface is deformed by a pedestrian or the like to prevent freezing. However, it is possible to prevent the snow from solidifying. Also, since it contains stone materials and sand, it is hard to slip,
Excellent in safety. Further, since the elastic surface layer is adhered and fixed to the hard pavement surface and the hard pavement board, peeling hardly occurs and durability is enhanced.

In the elastic pavement method of the present invention in which an elastic surface layer is provided on a hard pavement surface such as concrete, the elastic pavement is completed on site and is convenient for practical use. Further, in the elastic paving method in which an elastic surface layer is formed on the elastic paving board to form the elastic paving board and the paving board is spread, the step of providing the elastic surface layer can be performed in the factory for manufacturing the paving board, and the mass productivity is improved. Is excellent.

In the method for producing an elastic surface layer in which a mixture of silane and alcohol is applied on a hard pavement surface or a hard pavement plate and a mixture containing polyurethane is applied and cured, curing and adhesion of polyurethane can be performed simultaneously. It is practically convenient. By using a one-part moisture-curable polyurethane, mixing and construction are easy, and by setting the curing time relatively late, carbon dioxide is released well to the outside, preventing the formation of bubbles. be able to. Further, by diluting the silane with alcohol, it becomes possible to easily and thinly and widely apply the organic silane having an amine to the alcohol in an amount of 2-10.
A mixture of percentages (weight ratio) is extremely easy to use.

Claims (5)

[Claims] 1. An elastic surface layer obtained by bonding a stone material having a particle diameter of 5 mm or less, an aggregate made of sand, and a small piece or powder of rubber with polyurethane is adhered to a hard pavement surface such as concrete or asphalt. Elastic pavement method. 2. An elastic surface layer obtained by bonding a stone aggregate having a particle diameter of 5 mm or less, an aggregate made of sand, and a small piece or powder of rubber with polyurethane by bonding it onto a hard paving board made of concrete slab or the like. Elastic pavement method that spreads elastic pavement boards. 3. A silane / alcohol mixture is applied on a hard pavement surface such as concrete or asphalt or on a hard pavement plate made of concrete slab, and a stone material having a particle size of 5 mm or less, an aggregate made of sand, A method for producing an elastic surface layer in which a mixture of rubber particles or powder and uncured polyurethane is applied and then the polyurethane is cured. 4. The method for producing an elastic surface layer according to claim 3, wherein a one-component moisture-curable polyurethane having a curing time of 6 to 24 hours is used as the polyurethane. 5. The method for producing an elastic surface layer according to claim 3, wherein the silane / alcohol mixture is a mixture of an organic silane having an amine and 2 to 10% (by weight) of alcohol.