| abstract |
(57) [Summary] [PROBLEMS] To reduce the inhibition of the bond between cement and soil caused by organic substances mainly composed of corrosive acid such as humic acid in soil, Provided are an admixture for soil improvement, a soil improvement method, and an improved soil capable of increasing the hardness of the soil. SOLUTION: The soil improving admixture is Ca ++ , Na + , M g ++, K +, NH 4 +, Ba ++, Fe 3+, Al 3+, M eight or more cations of n 4+ , Co ++ , and Ti 4+ ; Cl -, SO 4 -, as the main component and P0 4 3- 2 or more kinds of anion of the organic acid. The soil can be improved by mixing the soil improving admixture with the soil in which cement and an appropriate amount of water are mixed. |