| 摘要 |
PROBLEM TO BE SOLVED: To provide an acid resistant cement composition applicable to both of a construction work of a newly constructing sewerage structure and a covering repair work of a surface part of an existing sewerage structure, and an acid resistant mortar or concrete.SOLUTION: The acid resistant cement comprises greater than 40 mass% to 50 mass% of a cement, 10-30 mass% of a mixture material exerting initial strength, and 20-50 mass% of a mixture material exerting mid and long term strength wherein the sum of the mass% of the cement, the mass% of the mixture material exerting initial strength, and the mass% of the mixture material exerting mid and long term strength makes a total of 100 mass%, or the sum of the mass% of the cement, the mass% of the mixture material exerting initial strength, the mass% of the mixture material exerting mid and long term strength, and the mass% of an added admixture makes a total of 100 mass%. Further, the acid resistant mortar or concrete is produced that includes 50-60 mass% of a water binder to the amount of composition. |
