| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a lightweight base material for civil engineering work which comprises granulated objects which can provide a reproduction lower-layer base material at an extremely low cost by a manufacturing method which eliminates waste even though it is an extremely simple method, and which makes possible the obtainment of reproduction granulated objects which can be used as a reproduction foundation ballast material or a reproduction back-filling material. Ž<P>SOLUTION: In the manufacturing method of the lightweight base material for civil engineering work which comprises granulated objects, a first mixture is made by adjusting a moisture content at 30 to 40 wt.% by mixing a first raw material with a second raw material. The first raw material is formed of an industrial waste having a high moisture content, and the second raw material is formed of paper sludge having a low moisture content. A second mixture is made by adding a third raw material containing at least a cement-based solidifying material to the first mixture, and the weight of the cement-based solidifying material is made 15 to 20 wt.% with respect to the gross weight of the second mixture at the time of addition of the third raw material. Then the reproduction granulated objects can be obtained by granulating the second mixture by a granulating machine. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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