JPH05214707A - Sheet for random paving - Google Patents

Abstract

PURPOSE:To make aggregate hard to fall away and improve imperviousness and durability, by burying abrasion resistant granular aggregate through silane coupling agent on one side of a flexible synthetic resin base sheet. CONSTITUTION:Abrasion resistant granular aggregate 1 is buried through silane coupling agent on one side of a flexible synthetic resin base sheet 2, in such a condition that at least a part of granules is exposed out of the sheet 2. In this case, a method to treat previously the surface of the aggregate 1 with the silane coupling agent, is desirable, as a method to make the silane coupling agent lie between the synthetic resin and the aggregate 1. It is acceptable, if stiffener consisting of woven fabric 3 or non-woven fabric is applied and used on the side opposite to the buried side of the aggregate 1 as necessary.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple paving sheet suitable for pavement of roads such as general roads, sidewalks and parking lots and floor pavement of factories, warehouses, exercise facilities and the like.

[0002]

2. Description of the Related Art In general road pavement, a roadbed is prepared by compacting slag, sand, etc. on the roadbed, then a base layer made of asphalt concrete, etc. is constructed on the roadbed, and asphalt concrete, cement concrete, etc. are further formed on the base layer. The surface layer of is constructed and completed. These works require considerable effort and time such as pressing and curing. Therefore, although new roads have little social impact, repairing existing roads requires labor and time close to that of new roads.
The economic burden will increase and the long-term traffic regulation will have a large social impact. In addition, with the conventional pavement method, cracks on the pavement surface are more likely to occur with the increase in traffic in recent years, and rainwater penetrates from these cracks, which promotes weakening of the roadbed and roadbed and shortens the road life. is doing.

The same applies to sidewalks and parking lots, but of these, particularly in structures such as pedestrian bridges and multistory parking lots, which mainly consist of steel frames, the road surface itself is also finished with steel plates, and therefore slips easily. For this reason, there are cases in which asphalt concrete or the like is constructed on a steel sheet, but the labor of construction and an increase in the weight of the entire structure are problems. Cement concrete is mainly used for floor pavement, but even if you want to pave easily, it takes time for construction and curing and securing slip prevention performance is a problem.

Therefore, as a simple paving material used as a surface layer of a general road, those described in JP-A-2-229306 and JP-A-2-229308 have been proposed. The above was not always satisfactory. Further, paving materials having an anti-slip layer are disclosed in British Patent Publication Nos. 1430794 and 14454.
Although proposed by No. 23, aggregates such as gravel easily fall off from the base sheet when subjected to repeated traffic loads, and there is a problem in sustainability of the slip prevention ability.

[0005]

DISCLOSURE OF THE INVENTION The present invention has water-proof and slip-preventing performance suitable for road surface layers such as general roads and floor surfaces of buildings, and has durability to withstand long-term traffic. The purpose is to provide a sheet for simple paving.

[0006]

SUMMARY OF THE INVENTION The gist of the present invention is that a wear-resistant granular aggregate is provided on one side of a flexible synthetic resin substrate sheet, and at least a part of the particles is outside the sheet. In the simple paving sheet which is embedded in the exposed state, the simple paving sheet is characterized in that the granular aggregate is embedded in the synthetic resin substrate sheet via the silane coupling agent.

Next, the present invention will be described in more detail. In the simple pavement sheet of the present invention, as the synthetic resin which is the material of the base sheet, for example, polyvinyl chloride, polyethylene, ethylene-vinyl acetate copolymer, thermoplastic resin such as polymethylmethacrylate, epoxy resin, polyurethane Examples of the resin include thermosetting resins such as resins and polyester resins, and elastomers such as synthetic or natural rubber.

Various known resin additives can be added to these synthetic resins. As the granular aggregate, those commonly used for general road pavement can be used. Specifically, for example, crushed stone, gravel, iron and steel slag, inorganic substances such as crushed emery and ceramics, hard rubber, thermosetting resin, granular particles of resins such as high-melting thermoplastic hard resin, and wood. Be done.

Regarding the particle size of the aggregate, the shortest triaxial diameter is less than the apparent thickness of the base resin layer of the paving sheet (sheet thickness excluding the exposed portion of the aggregate on the surface of the paving sheet). Something is preferable. The amount of aggregate may be determined according to the particle size of the aggregate and the thickness of the base material sheet, but the volume ratio of the aggregate to the synthetic resin is preferably in the range of 30% to 95%.

In the paving sheet of the present invention, the granular aggregate is embedded in the synthetic resin as the base sheet through the silane coupling agent. As a silane coupling agent,
Organosilicon compounds represented by the following general formulas (I) and (II) are used.

[0011]

[Chemical 1]

In the formula, X is hydrolyzed by a reactive group consisting of a methoxy group, an ethoxy group, a methoxyethoxy group, and a chloro group to form a corresponding alcohol or hydrochloric acid and a silanol group, respectively. Y is a vinyl group, a methacrylic group,
An organic functional group having an epoxy group, an amino group, a mercapto group, or the like, which has a reactivity with a synthetic resin or a high affinity.

Specifically, for example, trichlorosilanes such as vinyltrichlorosilane, vinyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane,
Trialkoxysilanes such as γ-aminopropyltriethoxysilane, γ-mercaptopropyltrimethoxysilane and γ-chloropropyltrimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, N-β
Examples thereof include dialkoxysilanes such as (aminoethyl) γ-aminopropylmethyldimethoxysilane.

As the silane coupling agent, one having a structure having an organic functional group having high reactivity or affinity with the resin is selected and used according to the kind of the synthetic resin used. The amount of silane coupling agent used is 0.1 based on the weight of the aggregate.
It is preferably used in the range of 5 wt%. If it is less than 0.1%, the effect of improving the adhesiveness is poor, and if it is more than 5%, the increase in the improving effect obtained is small compared to the increase in the processing cost, which is not practical.

As a method of interposing the silane coupling agent between the synthetic resin and the granular aggregate, a method of preliminarily surface-treating the surface of the aggregate with the silane coupling agent, or a silane coupling agent embedded in the synthetic resin in which the aggregate is embedded There is a method of compounding, a method of treating the surface of the synthetic resin base sheet with a silane coupling agent, and embedding an aggregate in the surface thereof. The method of pre-treating the aggregate is the base sheet and the aggregate. It is preferable in terms of adhesiveness with. When the aggregate is surface-treated, the silane coupling agent is preferably used as a solution of 1 to 20% by weight dissolved in water or an aqueous medium such as acetic acid water or a hydroalcohol mixture.

In the present invention, as a method for embedding at least a part of the granular aggregate in the state of being exposed outside the sheet, a synthetic resin to be a base sheet is melt-extruded, solution cast, calendered, laminated. After manufacturing a sheet having a thickness of 1 to 30 mm by a method such as a method, the sheet is held in a softened state, the aggregate is evenly spread on the sheet, and the spreading surface is pressed by a pressing material made of a material having rubber elasticity. , A method of uniformly dispersing aggregate on an uncured synthetic resin substrate sheet, and curing by heat or energy rays, or on a synthetic resin sheet, an uncured polyvinyl chloride sol containing aggregate,
There is a method in which an aggregate-containing synthetic resin such as an epoxy resin, a polyurethane resin, or a polyester resin is cast, and then heated and integrated.

In the simple paving sheet of the present invention, a woven or non-woven reinforcing material may be attached to the surface opposite to the surface in which the aggregate is embedded, if necessary. The reinforcing material can also be laminated in the base resin. As the reinforcing material in this case, for example, polyester, vinylon, cloth woven by bundling synthetic fibers such as nylon, or synthetic fibers,
Nonwoven fabrics such as natural fibers and glass fibers or papers are suitable.

In order to apply the simple pavement sheet of the present invention to a road or the like, a roll wound in a factory is transported to a construction site and fixed with an adhesive or a nail while unwinding, or a plate. The molded products are arranged on the construction site and fixed in the same manner.

[0019]

EXAMPLES The present invention will now be described in detail based on examples, but the present invention is not limited to the following examples as long as the gist thereof is not exceeded.

Example 1 50 parts by weight of DOP, 2 parts by weight of a stabilizer and 2 parts by weight of carbon black were mixed with 100 parts by weight of polyvinyl chloride (polymerization degree: 1100) to prepare a base sheet having a thickness of 4 mm. Manufactured. The crushed stone having a particle size of 2.5 to 5 mm is treated with a 10% aqueous solution of N-β (aminoethyl) γ-aminopropyltrimethoxysilane (KBM603 manufactured by Shin-Etsu Chemical Co., Ltd.), and after treatment, dried at 80 ° C. for 2 hours to treat the bone. I got the wood. The amount of the silane coupling agent attached was 1% by weight based on the weight of the aggregate.

On the base material sheet, surface-treated crushed stones were evenly distributed at a rate of 7 kg / m ² , and the whole was heated with hot air at 180 ° C., and then a distance between a pair of rolls with a gap of 5 mm was 1 m / m 2.
It was passed at a speed of min. Of the two rolls, the side in contact with the aggregate has a hardness of 80 (JIS K-6301A type),
Compression set 30% (JIS K-6301 70 ° C x 2
2 hrs), a 10 mm-thick EPDM rubber roll, and a metal roll on the opposite side.

A paving sheet having an apparent total thickness of 7 mm and crushed stones exposed by 1-2 mm outside the sheet was obtained. The obtained sheet was evaluated for slip resistance, water impermeability, durability and tensile strength by the following methods, and the results are shown in Table 1. Anti-slip property BPN value was measured with a pendulum skid resistance tester. A BPN value of 55 or more is required in a wet state. Water impermeability Measured by JIS L 1092 water resistance B method (for high water pressure). Water resistance of 5 kgf / cm ² or more is required. Durability The accelerated wear tester as shown in FIG. 2 was used to rotate the table board and run a tire with a wheel load of 3.0 kg / cm ² and a wheel load of 45 kg for 200,000 times. The dropout amount and the slip prevention property were evaluated. The amount of fall of the aggregate was obtained from the reduction of the sheet weight after the accelerated wear test. Note that the reduction of the seat weight was due to the fall of the aggregate. Tensile Strength Using a tensile tester, a sheet having a width of 50 mm and a length of 100 mm was tested at a tensile speed of 500 mm / min to measure the strength at break.

Example 2 In Example 1, the thread thickness is 20 below the base sheet.
A paving sheet was manufactured in the same manner as in Example 1 except that a lower layer of a polyester woven fabric having 0 denier and 20 yarns per inch was provided. Total apparent thickness 7 mm
Then, a paving sheet in which crushed stones were exposed by 1 to 2 mm outside the sheet was obtained, and the sheet was evaluated in the same manner as in Example 1. The results are shown in Table 1.

Example 3 A converter slag having a particle size of 1.5 to 3 mm was treated with a 10% aqueous solution of γ-aminopropylmethyldiethoxysilane (KBE902 manufactured by Shin-Etsu Chemical Co., Ltd.) by the same surface treatment method as in Example 1. .. PVC paste resin (degree of polymerization 1000) 1
50 parts by weight of DOP and 2 parts of stabilizer with respect to 00 parts by weight
1 part by weight of the slag-containing vinyl chloride sol in which the converter slag subjected to the above-mentioned surface treatment was added in an amount corresponding to 80% of the volume of the vinyl chloride sol in the vinyl chloride sol containing 2 parts by weight of carbon black. It was cast on a 2 mm thick sheet having the same composition as the above. After casting, it was passed through a hot air oven at 200 ° C. to gel the vinyl chloride sol and integrated with a vinyl chloride sheet to produce a paving sheet. A paving sheet having an apparent total thickness of 7 mm and slag exposed outside the sheet by 1 to 2 mm was obtained, and the sheet was evaluated in the same manner as in Example 1. The results are shown in Table 1.

Comparative Example 1 A paving sheet was produced in the same manner as in Example 1 except that crushed stone which was not surface-treated with a silane coupling agent was used. The obtained sheet was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

Comparative Example 2 A paving sheet was manufactured in the same manner as in Example 3 except that the converter slag which was not surface-treated with the silane coupling agent was used in Example 3. The obtained sheet was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

Comparative Example 3 A crushed stone having a particle size of 2.5 to 5 mm impregnated in an epoxy resin two-component adhesive (bisphenol A type, amine curing agent) and then pulled up is used. A pavement sheet was manufactured in the same manner as in Example 1 except that the above was performed. The obtained sheet was evaluated in the same manner as in Example 1, and the results are shown in Table 1.

[0028]

[Table 1]

[0029]

EFFECTS OF THE INVENTION The simple paving sheet of the present invention has a high level of water impermeability and durability for embedding embedded aggregates, which is good for road and floor paving. The utility value is extremely high.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of an example of a simple paving sheet of the present invention.

FIG. 2 is a schematic diagram showing a state of an accelerated wear test conducted to evaluate durability in Examples.

[Explanation of symbols]

 1 Aggregate 2 Synthetic Resin Base Sheet 3 Woven Fabric 4 Test Sheet 5 Tire 6 Table Board 7 Emery Sand in Hopper 8 Sprinkling Nozzle

Claims (2)

[Claims] 1. A simple pavement sheet in which a wear-resistant granular aggregate is embedded on one surface of a flexible synthetic resin base sheet with at least some of the particles exposed outside the sheet. 2. A simple paving sheet, wherein the granular aggregate is embedded in the synthetic resin base sheet via a silane coupling agent. 2. The simple paving sheet according to claim 1, wherein a reinforcing material of woven or non-woven fabric is provided as the lower layer and / or the intermediate layer.