JPH06346404A - Water permeable paved body and construction method therefor - Google Patents

Abstract

PURPOSE:To obtain a paved body which is free of cracks and lack of aggregates by placing inorganic granulated aggregates which include a thermosetting resin having a specified elongation, on the ground and coating the ground with a thermosetting resin having a specified bending strength. CONSTITUTION:Thermosetting resin A, such as epoxy resin, urethane resin, and unsaturated polyester resin whose tensile rupture elongation ranges from 100 to 500%, is mixed with inorganic granulated aggregates, such as natural stones, rushed stones, sintered ceramic particles and silica sand, thereby constituting a construction material (a). This mixing rate is so arranged that thermosetting resin A may be 2 to 15 parts by weight with 100 parts by weight of the inorganic granulated aggregates. Then, the surface of the construction material (a) is coated with epoxy resin whose bending strength exceeds 30kg/cm<2> at an amount of 30 to 500g per m<2>. The thermosetting resin may be replaced with thermoplastic resin, such as polyethylene, polypropylene, polyvinyl chloride and acrylic resin. This construction makes it possible to obtain a water permeable pavement material which is free of cracks and lack of aggregates.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-permeable pavement used for park roads, pavements, roads around buildings, poolsides, parking lots and the like, and a method for constructing the same. More specifically, the present invention relates to a water-permeable pavement that is less likely to crack due to its excellent followability with respect to an underlayer, and has less chipping of aggregate due to external stress, and a method for constructing the same.

[0002]

2. Description of the Related Art Conventionally, as a water-permeable pavement and its construction method, an adhesive layer having elasticity and water permeability is inserted as an intermediate layer between the construction body and the base (Japanese Patent Application Laid-Open No. 64-29502).
(Japanese Patent Application Laid-Open No. 6-122304), a method in which a porous reinforcement is inserted as an intermediate layer (Japanese Patent Application Laid-Open No. 61-122304), and a method in which a small-diameter aggregate is bonded to a periphery of a single-grain large-diameter aggregate with a polymer resin (Japanese Patent Application Laid-Open No. 63-268803) and the like are known.

[0003]

However, the above method cannot follow a large movement of the substrate, so that it is not sufficient to prevent cracks, and there is a problem that the construction is troublesome.

[0004]

DISCLOSURE OF THE INVENTION The inventors of the present invention have diligently studied a water-permeable pavement having excellent followability to a base, less cracks, and less chipping of aggregate due to external stress, and a construction method thereof. As a result, the present invention has been reached. That is, the present invention provides a water-permeable pavement composed of an inorganic granular aggregate and a resin, which has a tensile elongation at break of 10 with the inorganic granular aggregate.
Construction body (a) consisting of 0-500% resin (A)
And a surface layer (b) made of a thermosetting resin (B) having a bending strength of 30 kg / cm ² or more when used as a binder for the inorganic granular aggregate, and a water-permeable pavement body and inorganic particles A mixture consisting of 100 parts by weight of aggregate and 2 to 15 parts by weight of (A) was applied on a base, and (b) was added to 1 m of (a).
It is a method of constructing a water-permeable pavement characterized by applying 30 to 500 g to ² .

[0005]

[Function] The water-permeable pavement of the present invention is intended for artificial ground such as asphalt pavement and cement pavement as a base, and is formed by on-site construction. When applied to asphalt pavement ground The effect is remarkably exhibited. The reason is that the strength of asphalt-based pavement ground is extremely reduced due to the temperature rise in the summer, and it is easy for fluctuations such as depressions and cracks, and it is required for the upper-layer construction body to follow this. .

However, if too soft a binder is selected as the binder for the inorganic granular aggregate, which places great importance on the ability to follow the substrate, the adhesive strength of the aggregate is weak, and the aggregate becomes a surface layer over time due to external stress or the like. It has the drawback of falling off from the section. On the other hand, when a high-strength, high-adhesive binder is selected as the binder for the inorganic granular aggregate, cracks often occur in the water-permeable pavement due to the above-mentioned fluctuation of the base.

The present invention solves the conflicting problems described above. In other words, the water-permeable pavement body that is in direct contact with the base has the ability to follow the base, and the surface layer that is directly subjected to external stress such as walking and vehicle passage has high strength to prevent chipping of aggregates. A water-permeable pavement having a two-layer structure as a surface layer and a construction method thereof.

[0008]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited thereto.

The inorganic granular aggregate used in the present invention is not particularly limited, and examples thereof include natural stone, crushed stone, calcined ceramic particles, silica sand and a mixture thereof.

The tensile elongation at break used in the present invention is 1
The resin (A) whose content is from 0 to 500% is a thermosetting resin such as an epoxy resin, a urethane resin or an unsaturated polyester resin, or a thermoplastic such as polyethylene, polypropylene, polyvinyl chloride, polyvinyl acetate, petroleum resin or acrylic resin. Examples thereof include resins. Among these, thermosetting resins are preferable, and epoxy resins are more preferable.

The tensile elongation at break is specified in JIS K 6911, and is preferably 150 to 300%, more preferably 170 to 260%.

When the tensile elongation at break is 100% or less, the construction body (a) cannot follow the movement of the substrate, which causes cracks, and when it is 500% or more, the strength is insufficient even if the surface layer (b) is constructed. It is easy for the aggregate to fall off over time.

The thermosetting resin (B) having a bending strength of 30 kg / cm ² or more when used as a binder for the inorganic granular aggregate used in the present invention includes epoxy resin, urethane resin, unsaturated polyester resin, etc. Is given
Of these, epoxy resin is preferable.

The bending strength of the resin (B) is JIS
R 5201, preferably 50k
g / cm ² or more, more preferably 70 kg / cm ² or more.

When the bending strength is 30 kg / cm ² or less, the aggregate is liable to be chipped off with time because of insufficient strength.

The method for constructing a water-permeable pavement of the present invention is as follows: 100 parts by weight of the inorganic granular aggregate and 2 to 15 parts by weight of (A), preferably 4 to 10 parts by weight are applied to the base material and then the mixture is applied. , (B) is applied to (a) 1 m ^{2 in an amount} of 30 to 500 g, preferably 50 to 400 g.

(A) with respect to 100 parts by weight of the inorganic granular aggregate
If the amount is 2 parts by weight or less, the adhesion of the aggregate is insufficient, and if it is 15 parts by weight or more, the water permeability is impaired.

When (B) is less than 30 g per 1 m ^{2 of} (a), the reinforcing effect of the construction body is not sufficient, and when it is more than 500 g, the water permeability is impaired.

It is a major feature of the present invention that the resin (B) can be applied at any time after the applied product (a) has been applied, and can be applied without touch-drying.

Examples 1 to 3 and Comparative Examples 1 to 3 Inorganic granular aggregate 100k shown in Table 1 in a mortar mixer.
g and kneaded for 1 minute, and then resin (A) shown in Table 1
8 kg was added, and the mixture was kneaded for 2 minutes and then taken out. The kneaded product was subjected to removal of adhered substances, and was stretched uniformly to a thickness of 8 mm using a plastering iron on a newly-opened open-grained asphalt to construct a working body (a). This operation was repeated to carry out construction of 100 m ² .

When the resin (A) reaches dryness to the touch,
The resin (B) kneaded with the curing agent is used with a roller brush to
200 g was applied per m ² .

Further, the result of measuring the tensile elongation at break according to JIS K 6911 using a separately prepared (A) cured test piece and 8 parts by weight of (B) were uniformly mixed with 100 parts by weight of the inorganic granular aggregate. A cured test piece is prepared using mortar, and the bending strength is measured according to JIS R 5201. The results are also shown in Table 1.

[0023]

[Table 1]

* Ceramic particles: trade name, fashion serra, manufactured by Shibata Toki KK A1: Modified bisphenol epoxy resin and modified aliphatic amine curing agent A2: Polyoxypropylene glycol and aromatic Isocyanate type curing agent A3: Modified bisphenol type epoxy resin and modified aliphatic amine type curing agent A4: Modified bisphenol type epoxy resin and modified aliphatic amine type curing agent

After the construction bodies of Examples 1 to 3 and Comparative Examples 1 to 3 were cured for 1 week and used for 6 months as a general parking lot, cracks and chipping of the aggregate were observed. The results are shown in Table 2.

[0026]

[Table 2]

◯: No change visually observed Δ: Partially chipped off ×: Partially chipped off, partly engraved

As is apparent from Table 2, the water-permeable pavement and its construction method according to the present embodiment have no cracks even when constructed on an asphalt base, and when used as a pavement for a general parking lot. However, it was found that there was little deterioration due to chipping of the aggregate.

[0029]

INDUSTRIAL APPLICABILITY The water-permeable pavement of the present invention can prevent cracks from occurring, does not cause chipping of aggregates, and has a simple construction method, so that it can be used for park roads, pavements, roads around buildings, and
It can be widely used in rusides, parking lots, etc.

Claims (5)

[Claims] 1. A water-permeable pavement made of an inorganic granular aggregate and a resin, wherein the tensile breaking elongation is 100 to 100 with the inorganic granular aggregate.
Bending strength when used as a binding material for a construction body (a) made of 500% resin (A) and the inorganic granular aggregate is 3
A water-permeable pavement comprising a surface layer (b) made of a thermosetting resin (B) having a weight of 0 kg / cm ² or more. 2. The water-permeable pavement according to claim 1, wherein (A) is a thermosetting resin. 3. The water-permeable pavement according to claim 1, wherein (A) is an epoxy resin. 4. The method according to claim 1, wherein (B) is an epoxy resin.
3. The water-permeable pavement body according to any one of 3 above. 5. 100 parts by weight of inorganic granular aggregate and (A) 2 to
After applying a mixture consisting of 15 parts by weight on the base,
A method for constructing a water-permeable pavement, characterized in that (B) is applied in an amount of 30 to 500 g per 1 m ² of (a).