JP2000104210A - Road surface treatment method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the stuffing of voids and the scattering of aggregate by coating a surface of the water permeable asphalt pavement with the water permeable coating material prepared by mixing an aggregate having the specific distribution of grain size and a resin. SOLUTION: An aggregate composed of the particulate matter such as pulverized small stones, sand, gravel and ceramic and having the distribution of grain size including 60-90 wt.% of aggregate of 1.5-0.4 mm particle size and 10-40 wt.% of aggregate of below 0.4 mm particle size, is prepared. Then the aggregate and a resin such as an epoxy resin or the like are mixed by a weight ratio of (9:1)-(7:3) to prepare the coating material 2. A pigment, a surface active agent, and the short fiber such as carbon fiber or the like is optionally mixed in the coating material 2. In the application, the coating material 2 is applied to the water permeable asphalt surface 1 by 2-15 mm thickness. Whereby the pavement surface is reinforced while keeping the water permeability, and the stuffing of voids and the scattering of the aggregate can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road surface treatment method.

[0002]

2. Description of the Related Art Asphalt pavement having water permeability has attracted attention because it has a new effect of draining rainwater staying on the road surface and a new effect of reducing traffic noise due to its porosity. It is used for city roads. This pavement is called drainage asphalt pavement, and is mainly made of crushed stone with a relatively large particle size and close to a single grain, and uses a high-viscosity binder, modified asphalt, epoxy resin, etc. In particular, there is a material which is mainly used for pedestrian road pavement as a water permeable pavement using straight asphalt as a binder by combining single grain aggregates.

[0003]

However, since all of these pavement mixtures have large voids, their surfaces are broken by traffic vehicles or pedestrians, and the voids are early clogged by the earth and sand brought in.

On the other hand, exfoliation and rutting of surface aggregates easily occur due to impact, and it is difficult to maintain the original function for a long period of time. Also, there is no established method for determining the degree of damage or recovering or repairing the function.

Further, the noise reduction effect of the water-permeable asphalt is lost due to the clogging of the air gap. Therefore, there has been a strong demand for a method for solving such a drawback.

[0006]

In view of the above situation, the present inventors have made intensive studies and completed the surface treatment method of the present invention. In addition, a coating material obtained by mixing an aggregate and a resin and having water permeability is applied, and the particle size distribution of the aggregate is in the following range. (1) 60 to 90% by weight of aggregate having a particle size of 1.5 to 0.4mm, and (2) 10 to 40% by weight of aggregate having a particle size of 0.4mm or less.

[0007] The water-permeable asphalt means that the water on the pavement surface passes through the asphalt as it is and penetrates into the ground, and after the asphalt passes into the ground without penetrating into the ground, it is introduced horizontally into a flow-side gutter or the like. It contains water (so-called drainage asphalt). In short, water only needs to pass through the asphalt surface.

The aggregate may be not only small stones, sand, gravel and the like, but also granular materials such as crushed ceramics. The size is 1.5mm or less. Of course, in a strict sense
It does not mean that one grain of 1.5 mm or more must not be a single grain, and the grain may be not only a sphere but also various shapes,
Diameter also means size.

The present invention has the following six requirements. To ensure water permeability. Prevent the asphalt aggregate from scattering and exfoliating. Prevent clogging of voids such as dust. High slip resistance and wear resistance. To reduce tire road surface noise and maintain its function. To protect the environment. The present invention satisfies all six requirements. That is, the present inventor considered that a large aggregate of 0.4 mm or more contained 60 to 90%,
It has been found that mixing 10 to 40% of small aggregates of 0.4 mm or less has a good balance between the water passage function and the function to prevent clogging of the voids, ensures water permeability, and makes it difficult for the voids to be clogged.
Further, according to this particle size distribution, clogging of voids could be significantly reduced. This is because the experiments revealed that the majority of pores (sand, dust, etc.) on general roads were 0.1 to 0.2 mm in size. If the big aggregate is more than 90%,
The filtering effect is reduced. Also, if the small aggregate is 40% or more, water permeability is reduced. Of course, since the resin layer is provided on the upper layer, scattering of asphalt aggregate can be greatly reduced.
Noise is also greatly reduced because the resulting voids are very small.

Further, the particle size distribution of the aggregate is as follows: (1) Aggregate having a particle size of 1.5 to 0.8 mm is 30 to 50% by weight; But 30 to 50% by weight of aggregate of 0.8 to 0.4mm, (3) 5 to 15% by weight of aggregate of 0.4 to 0.2mm in particle size, and (4) aggregate of 0.2mm or less in particle size But 2-15% by weight. Among them, (1) 35-45% by weight of aggregate having a particle size of 1.2-0.8mm, (2) 35-45% by weight of aggregate having a particle size of 0.8-0.4mm, (3) 7-15% by weight of aggregate having a particle size of 0.4-0.2mm, (4) 2-10% by weight of aggregate having a particle size of 0.2mm or less. Was suitable.

[0011] As in this range, the large aggregate particle size
1.2mm or less, 0.4mm to 1.2mm 70
% Or more and not more than 0.4 mm or less to 30% or less, a greater effect was obtained by specifying the ratio of particles of each diameter.

[0012] The present invention is characterized by the particle size distribution of this aggregate.
It is better not to have anything less than m. However, the point is to put in fine aggregates, thereby preventing gaps due to fine dust from being clogged. In addition, sufficient water permeability can be exhibited even with this.

As the resin, an epoxy resin is preferable, but not limited thereto. An acrylic resin, a resin commonly used for spraying a wall surface or a road surface treatment, etc. Is fine.

The coating material is a mixture of the above-mentioned aggregate and resin, and the mixing ratio is to be determined according to the size of the aggregate and the type of resin, and is not particularly limited. However, there is no doubt that water permeability should be ensured to some extent and workability should be considered. Usually, the ratio of aggregate: resin is preferably about 9: 1 to 7: 3 by weight.

Needless to say, the resin may be mixed with other materials which should be mixed in addition to the aggregate. For example, it is a pigment or the like. Further, a surfactant may be mixed in the coating material. This is because mixing a surfactant with the coating material improves water permeability. Further, short fibers may be mixed with the resin to reinforce the resin. For example, carbon fibers having a length of about 1 mm are mixed with the resin at about 0.1 to 1.0% by weight. Of course, the fiber material may be glass, polyester, cotton thread, or any other reinforcing material.

The coating means that a coating material is applied in layers on the surface of the water-permeable asphalt. Although it penetrates into the aggregate gap of the permeable asphalt, it is applied with a predetermined thickness more than that. The thickness is not particularly limited, but is 2 to
About 15 mm is preferable. Coating is trowel coating, machine construction,
Any method such as roller coating may be used.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. FIG. 1 is a process diagram for carrying out the method of the present invention, wherein (a) is a water-permeable asphalt surface 1. (B) shows that the coating material 2 of the present invention was applied thereon with a thickness of 5 mm. As for the construction, it is only this and very simple.

[0018]

According to the method of the present invention, there are the following advantages. The water-permeable pavement surface is reinforced while maintaining water permeability, and the collapse of voids and the scattering of aggregates are significantly reduced. The filler using fine aggregate is densely packed, the garbage is extremely small, the cleaning is easy, and the gap is suppressed. Reduce the running noise of traffic vehicles and maintain their functions. Since the coefficient of sliding friction is large and the wear resistance of the surface is large, safety can be ensured. By mixing the pigment into the resin, the road can be colored at the same time, and the beautification and conservation of the environment can be maintained.

[Brief description of the drawings]

FIG. 1 is a process sectional view showing an example of a construction method of the present invention.

[Explanation of symbols]

 1 Water-permeable asphalt surface 2 Coating material

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tatsutoshi Shimabara 2-109 Fukusaku-ku, Nishiura-cho, Fushimi-ku, Kyoto 1109 Nishiura Danchi 1109 (72) Inventor Shoichiro Suzaki 2-13-6 Matsugaoka, Takatsuki-shi, Osaka F Terms (reference) 2D051 AA02 AA06 AA08 AD01 AF01 AG01 AG14 AG17 EA01 EA03 EB04 EB06

Claims (2)

[Claims] 1. A method for coating a surface of a water-permeable asphalt pavement with a coating material obtained by mixing an aggregate and a resin having water permeability, wherein the particle size distribution of the aggregate is within the following range: A surface treatment method for a road, comprising: (1) 60 to 90% by weight of aggregate having a particle size of 1.5 to 0.4mm, and (2) 10 to 40% by weight of aggregate having a particle size of 0.4mm or less. 2. The road surface treatment method according to claim 1, wherein the resin is an epoxy resin.