Claims
- 1. A structure of a ground surface portion, characterized by including a cushion layer which is obtained by arranging elastic chips alone or mixing said elastic chips with sand is formed on a groundwork, said elastic chips comprising an elastic component and a specific gravity adjusting component, said specific gravity adjusting component having a specific gravity of 3 or more, said elastic chips having a size of 7 mm to 0.05 mm and a specific gravity of 1.8 to 3.5.
- 2. The structure of the ground surface portion as claimed in claim 1, wherein the size of said elastic chips is from 2 mm to 0.5 mm.
- 3. The structure of the ground surface portion as claimed in claim 1, wherein said elastic component is selected from the group consisting of synthetic rubber, natural rubber and synthetic resin.
- 4. The structure of the ground surface portion as claimed in claim 3, wherein said specific gravity adjusting material comprises inorganic powder.
- 5. The structure of the ground surface portion as claimed in claim 1, wherein said cushion layer contains said elastic chips of 3 wt % or more.
- 6. The structure of the ground surface portion as claimed in claim 1, wherein said cushion layer has a thickness of 50 mm to 200 mm.
- 7. The structure of the ground surface portion as claimed in claim 1, wherein said groundwork has a roadbed layer which is formed by tamping sand or soil or paving with asphalt concrete or concrete, and said cushion layer is formed on said roadbed layer.
- 8. The structure of the ground surface portion as claimed in claim 7, wherein the thickness of said roadbed layer formed by tamping sand or soil is set to 200 mm to 300 mm.
- 9. The structure of the ground surface portion as claimed in claim 7, wherein the thickness of said roadbed layer formed by paving with asphalt concrete or concrete is set to 50 mm to 70 mm.
- 10. The structure of the ground surface portion as claimed in claim 1, wherein the particle size of said sand is 2 mm to 0.5 mm.
- 11. The structure of the ground surface portion as claimed in claim 1, wherein said cushion layer contains at least 10% by weight of said elastic chips.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8-011713 |
Jan 1996 |
JPX |
|
CROSS REFERENCE TO RELATED APPLICATION
This is a continuation of International Application PCT/JP97/02878 filed Aug. 20, 1997.
US Referenced Citations (4)
Foreign Referenced Citations (2)
Number |
Date |
Country |
7-158007 |
Jun 1995 |
JPX |
8-109603 |
Apr 1996 |
JPX |
Non-Patent Literature Citations (1)
Entry |
Chemical Engineer's Handbook; 4th Edition, John H. Perry, 1976. |
Continuations (1)
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Number |
Date |
Country |
Parent |
PCTJP9702878 |
Aug 1997 |
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