| 摘要 |
PROBLEM TO BE SOLVED: To provide the concrete that contains fine-powdery limestone having appropriate quality conforming to quality conditions of the concrete and has a unit water content reduced to a possible minimum level within the range such that the concrete can be provided with required flowability and accordingly, enables a reduction in excess heat of hydration and also has excellent workability and economical efficiency. SOLUTION: This concrete comprises: fine-powdery limestone having a 2,500 to 10,000cm<2> /g specific surface area; coarse aggregate having >=15mm grain size maximum dimension and a >=0.4m<3> /m<3> unit bulk volume; a cementitious material consisting of a material hardenable by hydration, such as cement, or the like, and an inorganic powder that has hydraulicity or latent hydraulicity and is used concurrently with cement; and water. The concrete is produced by blending these components so as to have a >=65% water/cementitious material ratio, a 150 to 185kg/m<3> unit water content, a 25 to 40% water/powdery material ratio and a 0 to 285kg/m<3> unit cementitious material content. |
