| 摘要 |
PROBLEM TO BE SOLVED: To provide an inorganic retarded hardening grout having a sufficient setting retarded hardening property and a sufficient adhesiveness to steel materials for prestressed concrete (PC) and sheaths after hardening. SOLUTION: This grout is composed of a cement, an inorganic fine powder, a setting retarder, a viscosity modifier, and water. The cement is Portland cement containing belite of 30-70 mass%. The inorganic fine powder is≥1 kind(s) selected from the group consisting of fly ash, blast furnace slag fine powder, silica fume, and limestone fine powder. These components are mixed so as to satisfy the following conditions: (A) The mixing ratio of (the water and the setting retarder)/(the cement and the inorganic fine powder) is 25-55 mass%; (B) The mass ratio of the cement/the inorganic fine powder is 95/5-75/25; (C) The solid content of the setting retarder is 0.4< and≤1.0 mass% of the cement; and (D) The content of the viscosity modifier is 0.5-1.5 mass% to the total of the cement and the inorganic fine powder. COPYRIGHT: (C)2005,JPO&NCIPI |
