| 摘要 |
PROBLEM TO BE SOLVED: To obtain cement the handling property of which is improved, which is weakly alkaline and from which ammonia is not generated, more preferably. SOLUTION: The cement composition is based on magnesia, calcium carbonate and dihydrogen phosphate. Otherwise, the cement composition is based on magnesia and dihydrogen phosphate and the solution, which is obtained by an elution test of a hardened body obtained by hardening the cement composition, has pH 7-11. A calcined material of dolomite is suitable as magnesia and calcium carbonate. The cement composition is useful as a soil conditioner, an immobilizing material for immobilizing heavy metal-containing industrial waste, a fixing material for fixing the geological layer for radioactive waste, a foamable injectant or the like. COPYRIGHT: (C)2009,JPO&INPIT |
