JPS6037302A - Cushion body of pavement and production thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cushioning material laid under the surface layer of sports fields such as tennis courts and roads such as sidewalks and jogging paths.

Outdoor playgrounds and roads are affected by the weather, so a variety of surface layers are used. Examples of tennis courts include clay courts, Anzuoka courts, asphalt courts, and all-weather courts. Among these, clay courts and Antukar courts that use natural soil as the surface layer have a moderate elasticity, but they become soft when it rains and take time to be used. The soil becomes very hard and loses its elasticity.

Also, asphalt foot and all-weather coat, which are not affected by the weather so much, have a hard surface layer. Exercising on a court that has a hard surface layer and lacks elasticity will damage your legs and lower back and make you more likely to get tired. This is because the coat itself has no elasticity, and if you exercise for a long time, it can damage your legs and hips.
If the player falls, there is a risk of sprains or fractures, and he will not be able to play to his full potential. Moreover, if the coat itself does not have appropriate elasticity, it will be vulnerable to vibrations caused by automobiles or the movement of the earth's crust, and will lack durability.

In order to eliminate such defects, it is necessary to provide a cushion layer below the surface layer, but as disclosed in the prior art, for example, Japanese Patent Publication No. 52-6'542, the cushion layer is made of plastic, rubber, etc. Some have a cushion layer made of aggregate. However, although plastic and rubber have elasticity, they do not absorb water, so after it rains, the rainwater accumulated in the surface layer above this cushion layer is expected to penetrate into the ground through the cushion layer. Since this is not possible, it takes time until the coat can be used. In addition, it is difficult to lay waste plastics, rubber, etc. unless it is crushed to a certain particle size, and on the other hand, even if waste is used, crushing it to a certain particle size is expensive, increasing the cost of creating the court. becomes.

This invention has been made based on the above-mentioned drawbacks, and by having the structure described in the claims, it has water absorption and water retention properties, maintains ideal wettability, and is rich in elasticity. An object of the present invention is to provide a cushioning material for a pavement that does not cause fatigue during exercise and a method for manufacturing the same.

Next, the configuration of the present invention will be described by way of examples based on accompanying drawings.

First Invention In Fig. 1, a cushioning material for a paving body is characterized in that rice husk is mixed with powder pulverized to particles of 0.1% or less and crushed stone pulverized to particles of 4% or less with an appropriate amount of moisture and solidified. , the cushioning material 1 consists of [62 (actual or sliced), basalt 3 which is a powder crushed into particles of 0.1% or less, and 111'I of 4% or less.

Andesite 4, which is crushed stone, is mixed with an appropriate amount of water and solidified. The basalt 3 is rice husk 2
It is a powder that adheres to the surface of the rice husk 2 and gives appropriate specific gravity to the rice husk 2, and has a powder content of 0.1% or less, preferably 0.074% or less. The andesite 4 maintains the appropriate strength and TFT of the cushion material 1, and is preferably 4% or less, and preferably 2.
Less than 5% crushed stone. In addition, as for the mixture (volume ratio) of the above three materials, the ratio of basalt 3 to rice husk 2 is 40% or less, preferably 20%, to form a mixture, and andesite is 90% or less, preferably 20% or less, to this mixture. are mixed to 70% to form cushion *A'1. Furthermore, this cushion material 1
In order to improve the adhesion of the three types of adhesives, an adhesive such as magnesia clinker may be added.

Second Invention By blending 40% or less by volume of powder pulverized into particles of 0.1% or less into rice husk and mixing with an appropriate amount of water, a mixture is obtained in which the powder is adhered to the surface of the rice husk. In addition, crushed stone crushed to particles of 4% or less is 90% by volume.
A method for producing cushioning materials for pavements, characterized by mixing and solidifying with an appropriate amount of moisture. Below, preferably 40% or less of basalt 3, which is a powder crushed into particles of 0.074% or less, is blended,
The process of adding an appropriate amount of water and loosening the rice husks when dry is repeated, and the basalt 3 is adhered to the surface of the rice husks 2 to obtain a mixture. In addition, the mixing ratio of basalt 3 to rice husk 2 (
The volume ratio) is 40% or less, preferably 20%. Further, the appropriate amount of water is desirably less than slump -O in a slump test for measuring the water content of concrete.

Second Step: In order to maintain appropriate strength and mass in the cushioning material 1, 90% or less by volume of andesite 4, which is crushed stone crushed into particles of 4% or less, preferably 2.5% or less, is added to the mixture. , mixed and solidified by a suitable method. The mixing ratio (volume ratio) of andesite 4 to the mixture is 90% or less, but preferably 70%. At this time, in order to improve the adhesion of the three types of materials and to fill the gaps between the particles of rice husk 2 and andesite 4, powdered basalt mixed with cement, lime, and magnesia clinker as an adhesive is also mixed. It is preferable to do so. The amount of adhesive varies depending on the application, and in the case of playgrounds, set each strength with a broctor needle,
Determine the amount of adhesive and for roads such as sidewalks and jogging paths - axial compressive strength.

Each strength is set by a flat plate loading CBR test, and the amount of adhesive is determined.

Next, the functions and effects of the cushioning material for the pavement body of the first invention will be described.

As shown in FIG. 2, for example, in the pavement of a playground, etc., a cushion layer 6 is formed by laying a cushion material 1 on a base layer 5 made of granular crushed stone, etc., and performing rolling compaction. A surface layer 7 is formed on top as a finish. By this rolling pressure, the rice husk 2. The particles of basalt 3 and andesite 4 become dense and adhere to each other. The rice husk 2 is an inorganic substance and has a high water absorption property due to its nature, and once it absorbs water, it has a water-retentive property that retains the moisture within the rice husk 2. Also, even after compaction, some air remains within the rice husk 2, so that capillary formation occurs. It also has high water permeability due to this phenomenon. Therefore, even if it rains, the rainwater accumulated in the surface layer 7 is immediately absorbed and permeated into the cushion layer 6, so the surface layer 7 dries quickly and the waiting time can be shortened. In addition, this absorbed and permeated rainwater is absorbed into the rice husk 2.
Since water is retained within the pavement and ideal wettability is maintained, elasticity is created in the cushion layer 6, and elasticity is also created in the pavement, which not only does not make the person feeling fatigued, but also prevents injury. You can also do it. On the other hand, if the surface layer 7 is made of natural soil, the surface layer 7 will dry out and become hard or crack when sunny days continue, but the rice husk 2 in the cushion layer 6 retains water. The above-mentioned drawbacks can be prevented because the water present in the film rises and supplies an appropriate amount of water to the surface layer 7. In addition, the rice husk 2 is a waste material and does not require any processing such as crushing, and can be used as it is, so the cost can be reduced.

Next, the functions and effects of the method for manufacturing a cushioning material for a pavement body according to the second invention will be described.

First, in step @1, Musha 3 is mixed with the rice husk 2 and the powdered grain, but this is to attach the basalt 3 to the surface of the rice husk 2, and in this way,
The specific gravity of the light rice husk 2 increases, which prevents the rice husk 2 from being blown away by the wind when laying the cushioning material 1 outdoors, and also prevents the rice husk 2 from joining together and spreads the rice husk 2 uniformly within the cushioning material 1. Can be dispersed.

Next, in the second step, crushed andesite is mixed into the mixture of rice husk 2 and basalt 3. This is to maintain appropriate strength and specific gravity of the cushion material 1. If the rice husk 2 is not completely crushed even when laid and rolled, the rice husk can maintain water retention and the strength of the cushion layer can be increased.

Further, by simultaneously mixing cement, lime, and powdered basalt mixed with magnesia clinker as an adhesive, the gap between the rice husk 2 and the andesite 4 is filled, and the adhesion between the particles is improved. The cushioning material 1 manufactured in this way is used as the cushioning layer 6 of the pavement, but the effects of the inner body of the cushioning material 1 are the same as those of the first invention, so a description thereof will be omitted.

Next, Table 1 shows experimental data of water absorption and water retention tests of the cushioning material of the present invention. Table 1 shows cushion material 1 with 10% diameter A.
, 20% diameter B, and 40% diameter C were immersed in water for 10 minutes, their weights were measured, and the dry weights and water-soaked weights were compared.

Table 1 As shown in Table 1, the weight of the cushion material after immersion in water is approximately 25%.
It is increasing before and after. This is 10% for mortar etc.
A comparison between the before and after shows that the cushioning material of the present invention is significantly more transparent in both water permeation and water retention effects, and therefore has better elasticity. In addition, for this elasticity test, the same flat plate blower was laid as a surface layer on the part where the cushioning material of the present invention was laid and on the ordinary roadbed.
We conducted an experiment by having 0 people walk and see if they could feel the elasticity. The results are shown in Table 2.

Table 2 As a result, 23 people (77%) felt elasticity after just doing one line, so it can be inferred that everyone would feel elasticity if they ran or exercised on it. , it is proven that the cushioning material of the present invention has transparent elasticity.

Although one embodiment of the present invention has been described above in detail, the powder and crushed stone are not limited to basalt and andesite, and other stones can also be used.

As described above, according to the present invention, it is possible to provide a cushioning material for a pavement body that has water absorption and water retention properties and maintains ideal wettability, thereby being highly elastic and not causing fatigue even during exercise, and a method for manufacturing the same. .

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the cushioning material of the present invention, and FIG. 2 is a cross-sectional view of a pavement of a playground. 1. Cushion material 2. Rice husk 3. Basalt 4.
・Andesite 5. Base layer 6. Cushion layer 7. Surface layer

Claims (1)

[Scope of Claims] fil Powder pulverized into particles of 0.1% or less in rice husk, and 4
1. A cushioning material for a pavement body, characterized in that crushed stone crushed into particles of less than 10% is mixed with an appropriate amount of water and solidified. (2) The cushioning material for a pavement according to claim 1, wherein the powder and crushed stone are made of basalt or andesite. (3) Mix O, 40% or less by volume of powder pulverized into particles of 1% or less with rice husk, and mix with an appropriate amount of water to form a mixture in which the powder is attached to the surface of the rice husk. A method for producing a cushioning material for a pavement, further comprising blending 90% or less by volume of crushed stone crushed into particles of 4% or less, mixing with an appropriate amount of water, and solidifying the mixture.