| 摘要 |
PROBLEM TO BE SOLVED: To provide cement increasing the amount of waste used as raw materials and having physical properties equal to high early strength portland cement.SOLUTION: A cement contains a ground product of a burned product having hydraulic modulus (H.M) of 2.10 to 2.30, silica modulus (S.M.) of 1.80 to 2.48, iron modulus (I.M.) of 1.3 to 2.6 and a ratio of 3CaO SiOin 100 mass% of the burned product is 70.0 mass% or less as a calculated value by the Bogue equation, and gypsum, and the ratio of gypsum in 100 mass% of the cement is 1.2 mass% or more in terms of SOconversion, and a ratio of gypsum hemihydrate to gypsum dihydrate and gypsum hemihydrate in the cement is 30 mass% or more in terms of SOconversion. |
