JP2000355903A - Pavement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve water permeability of road surface, prevent cracking, and reduce noise of vehicles, by using pavement in which a synthetic resin as a binder is added in vermiculite powder which is obtained by grinding vermiculite and burning it at a high temperature. SOLUTION: A base course 2 is compacted by rolling to remove irregularities, and pavements 1 are laid thereon. Vermiculite is ground into 1.5-3.5 mm in the granular size and burned at 300-1100 deg.C to form vermiculite powder having a bellows-shaped air layer. Water of 5-20 wt.% is added to 100 wt.% of the powdered vermiculite and kneaded to adjust the granular hardness. Then, 10-40 wt.% of lime, silica sand, sand, etc., as a stabilizer and 50-20 wt.% of foamed urethane as a binder are added therein and kneaded to flow out on the base course 2 to pave it. Then, it is compacted by rolling. After it has beed hardened, a top coat is applied to finish the pavement. In this way, a road face endurable against rainwater and snow can be obtained by water permeability, water- retaining property, and water-absorbing and desorbing property of the vermiculite powder and flexibility of the synthetic resin. It can prevent cracking and reduce noise in travel of vehicles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a road, a promenade,
It relates to pavement materials laid on roadbeds such as park roads and open spaces.

[0002]

2. Description of the Related Art Conventionally, pavements such as roads, promenades, park roads, cycling roads and plazas include color pavement, asphalt pavement, concrete pavement, tile pavement, and brick pavement. . . . . Various pavements have been adopted. In particular, in recent years, colorful pavements have been favored for the purpose of enhancing the living environment, and many color pavements have been constructed. For example, there is a color pavement in which a pavement material containing silica sand, a synthetic resin emulsion, and a coloring pigment as main components is evenly laid on a pavement surface.

[0003]

However, conventional pavements are all susceptible to rain and snow and cracks (cracks).
Often occurred. For example, even in a pavement using a pavement material containing silica sand, a synthetic resin emulsion, and a coloring pigment as main components, the adhesion between the resin emulsion and the aggregate (silica sand) is poor, and it is not only weak to rain and snow but also to pavement. , Cracks often occurred.

[0004] Conventional pavement materials have poor water permeability and lead to freezing of the road surface in cold regions, and are not necessarily high in cold resistance, resulting in a short life span of the road. There is also a problem that the effect is small in terms of absorbing noise generated between the two to prevent noise.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and has as its object the purpose of being resistant to rain and snow, having no cracks, having high water permeability and high cold resistance, and having a noise prevention effect. The provision of paving materials.

[0006]

According to a first aspect of the present invention, there is provided a pavement material selected from vermiculite powder crushed and fired at a high temperature, lime, silica sand and sand. One or more types and a synthetic resin as main components are kneaded and laid on a roadbed.

The pavement material according to claim 2 of the present invention is selected from water of 5 to 20% by weight, lime, silica sand, and sand with respect to 100% by weight of crushed and high-temperature fired vermiculite powder. 10 to 40% by weight of at least one of
It is made of a kneaded material containing 0% by weight and is laid on a roadbed.

The pavement material according to claim 3 of the present invention is characterized in that the synthetic resin is a urethane foam resin.

Further, a pavement material according to claim 4 of the present invention is characterized in that the silica sand is silica sand No. 3 and No. 4.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing the structure of a road according to an embodiment of the present invention. A pavement material 1 according to the present invention is laid on a sufficiently compacted roadbed 2. The pavement material 1 is laid on the roadbed 2 using a rake so as to have a uniform thickness.

FIG. 2 is a sectional view showing the structure of another road according to an embodiment of the present invention.
The primer 3 is sprayed thereon, and the paving material 1 according to the present invention is laid on the primer 3. Note that reference numeral 4 denotes a curb that partitions the pavement portion.

[0012] The pavement material 1 is a vermiculite powder pulverized and fired at a high temperature, and lime, silica sand and sand.
More than one kind and a synthetic resin are used as main components, and these are kneaded and used. Vermiculite contains a large amount of water, and when heated, water is released and expands. The particles are accordion-like (bellows-like) and have a void layer. Become. Therefore, when kneading, it is preferable to add an appropriate amount of water.

The high-temperature firing temperature is 300 ° C.
1100 ° C. can be exemplified, and the particle size for pulverizing vermiculite is not particularly limited, but a preferred range is approximately 1.5 to 3.5 mm in particle size.

[0014] Next, an example of the formulation is as follows: 5 to 20% by weight of water, 10% or more selected from lime, silica sand and sand with respect to 100% by weight of vermiculite powder pulverized and baked at a high temperature.
It is preferable to mix 40% by weight and 5 to 20% by weight of the synthetic resin. Water is used to give respirability to the crushed and high-temperature calcined vermiculite powder and to determine the hardness when kneaded. Therefore, if it is less than 5% by weight, the kneaded state is too hard.
If it is more than weight%, it is too soft. Therefore, the range of 5 to 20% by weight is desirable for imparting respirability to the pulverized and high-temperature calcined vermiculite powder to obtain a preferable kneading state.

[0015] Further, since one or more kinds of compounds selected from lime, silica sand and sand are used as stabilizers, the characteristics of vermiculite powder pulverized and fired at a high temperature if too much are not utilized. When the amount is too small, the effect as a stabilizer does not occur. Therefore, in order to take advantage of the characteristics of vermiculite powder that has been pulverized and fired at a high temperature, and to maintain the effect as a stabilizer, it is necessary to use 1
A range of 0 to 40% by weight is preferred. As the silica sand,
Silica sand No. 3 and No. 4 can be exemplified as preferable ones.

Furthermore, since the synthetic resin serves to provide flexibility to the pavement material and also serves as a binder, if it is too much, it is too soft and unsuitable for roads, and if it is too little, it has no effect. A range of 5 to 20% by weight is preferred. Examples of the synthetic resin include a urethane foam resin, for example, an acrylic polymer urethane resin.

Next, a construction example will be described. Vermiculite 1.5 ~
After pulverized to a size of 3.5 mm, it is fired at a high temperature. 10% by weight of water is added to 100% by weight of this vermiculite powder and mixed. Next, lime, silica sand No. 3, No. 4 and one or more of the four types of coarse sand are added in an amount of 20 to 30% by weight and kneaded with a mortar mixer or a mixing mixer for 1 minute, and then the urethane foam resin is added thereto. Add 11 to 13% by weight and knead for 2 to 3 minutes. Next, the fluid is discharged from the mixer outlet onto the roadbed on which the irregular rolling pressure has been completed, leveled, and roller rolling is performed. When the flattening and rolling are completed and completely cured, a top coat is applied to the surface to complete the construction. Examples of the top coat material include a mixture of urethane foam resin and ethyl acetate in a ratio of 4: 6 or 3: 7.
Apply 0.5 liter.

[0018]

As described above in detail, the present invention comprises, as main components, vermiculite powder which has been pulverized and fired at high temperature, at least one selected from lime, silica sand and sand, and a synthetic resin. Since this is kneaded and laid on the roadbed, the following effects are obtained.

(1) The vermiculite powder that has been ground and fired at a high temperature is excellent in water retention and water permeability, has breathability in particles, and is flexible with synthetic resin, so it is resistant to rain and snow and cracks. (Cracking) does not occur.

(2) The vermiculite powder that has been pulverized and fired at a high temperature has high water permeability, accordion-like (bellows-like) particles, a large void layer, and freezing of the road surface even in cold regions because the particles are respirable. No cold resistance.

(3) The vermiculite powder that has been pulverized and fired at a high temperature has a large void layer and is excellent in sound absorption as described above, so that noise can be prevented when the automobile is running. In addition, it is safe without slipping on the road surface.

(4) Since the water permeability is good, the drainage of the road surface is good, and the influence on the groundwater is small. (5) Because it is a synthetic resin, it is flexible and easy to walk, and has little fatigue when walking.

(6) Since at least one selected from lime, silica sand and coarse sand is blended as a stabilizer, the synergistic effect of the pulverized and high-temperature fired vermiculite powder and the synthetic resin is combined. As a result, the life of the road can be maintained long.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a road structure according to an embodiment of the present invention.

FIG. 2 is a sectional view showing another road structure according to the embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pavement material concerning this invention 2 Subbase 3 Primer 4 Green stone

Claims (4)

[Claims] Claims: 1. A vermiculite powder which has been crushed and fired at a high temperature, at least one selected from lime, silica sand and sand, and a synthetic resin as main components, which are kneaded and laid on a roadbed. Pavement material characterized by that. 2. A vermiculite powder 100 ground and fired at a high temperature.
5 to 20% by weight of water, a mixture of 10 to 40% by weight of at least one selected from lime, silica sand and sand, and 5 to 20% by weight of synthetic resin. Pavement material characterized by being laid in. 3. The pavement material according to claim 1, wherein the synthetic resin is a urethane foam resin. 4. The pavement material according to claim 1, wherein said silica sand is silica sand No. 3 and No. 4.