| 摘要 |
PROBLEM TO BE SOLVED: To provide a cement admixture capable of constructing earthen floors, floor boards or slab structures having high crack resistance even without reinforcing rods, and to provide a cement composition. SOLUTION: The cement mixture contains an expansive material obtained by blending CaO, Fe2 O3 , CaSO4 and, if required, Al2 O3 , and performing heat treatment, and containing free lime, calcium ferrite and/or calcium aluminoferrite, and anhydrous gypsum, and a fibrous material. The fibrous material consists of steel fiber. The cement composition contains cement, and the cement admixture are provided. |
