| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for producing high-strength concrete having high fluidity and material separation resistance at the time of placing and exhibiting high strength after hardening.SOLUTION: In a method for producing high-strength concrete obtained by mixing a binder containing at least cement, silica fumes and an expanding material, water added so that a weight ratio of the water to the binder is 10-15%, a fine aggregate, a coarse aggregate comprising ballast or crushed stone, and a water reducing agent added so that a weight ratio of the water reducing agent to the binder is 2-4%, after the expanding material in the binder is replaced by a binder for replacement obtained by removing the expanding material from the binder, the mixing is performed so that the zero tapping flow value of mortar, which is a mixture of the cement, the silica fumes, the binder for replacement, the water, the fine aggregate, the coarse aggregate, and the water reducing agent, becomes 250-350 mm.</p> |
