| abstract |
[PROBLEMS] To have good fluidity before curing and excellent workability, and after curing, it exhibits a very high compressive strength exceeding 250 N / mm 2 or 200 N / mm 2 or more. A cement composition that exhibits high compressive strength and has a low self-shrinkage rate is provided. SOLUTION: (A) Cement, (B) Fine powder with BET specific surface area of 5 to 25 m 2 / g, (C) Inorganic powder with Blaine specific surface area of 3,500 to 10,000 cm 2 / g, (D) Cement composition containing fine aggregate, (E) water reducing agent, and (F) water, wherein (D) fine aggregate contains 2CaO · SiO 2 and 2CaO · Al 2 O 3 · SiO 2 and, including against 2CaO · SiO 2 100 parts by weight, the fired product the total amount of 2CaO · Al 2 O 3 · SiO 2 and 4CaO · Al 2 O 3 · Fe 2 O 3 is 10 to 100 parts by weight Cement composition. [Selection figure] None |