| 摘要 |
PROBLEM TO BE SOLVED: To obtain a hardening accelerator for cement which exhibits stable hardening acceleration effect without depending on the kinds and brands of cement, and to obtain a cement composition. SOLUTION: The hardening accelerator contains slaked lime and at least one or more kinds selected from thiosulfate, formate, nitrate and nitrite. The blending proportion between the slaked lime and at least one or more kinds selected from thiosulfate, formate, nitrate and nitrite is controlled to 97/3 to 5/95 by a mass ratio. Further, 100 pts.mass of cement is blended with the hardening accelerator of 0.2 to 10 pts.mass to compose the cement composition. COPYRIGHT: (C)2004,JPO |
