| 摘要 |
PROBLEM TO BE SOLVED: To provide a base course material which makes a base course more compact thana conventional base course material of only natural crushed stones, makes a coefficient of a load bearing capacity of the base course higher and maintains strength even after the execution of work, and a backfill filler which absorbs a topographic change. SOLUTION: A mixture, which is obtained by mixing a cement-based solidifying material, a reinforcing material and water into mud of rock-like powder, is deaerated by vacuum suction, cured, hardened and crushed, so as to be used as a granular recycled material for construction. The granular recycled material, whose weight is 10-50% of total weight, and the natural crushed stones and a material equivalent to the crushed stones, which serve as the other materials, are mixed together and used as the base course material A and the backfill filler B. The granular recycled material is deformed or crushed among the natural stones etc., so that granules can be consolidated and so that the coefficient of the load bearing capacity of the base course can be made higher; and an increase in strength can be expected because the hardening is advanced even after the execution of the work. The topographic change is absorbed by the backfill filler B so as not to exert an influence on an underground structure. COPYRIGHT: (C)2004,JPO
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