| 摘要 |
PROBLEM TO BE SOLVED: To provide a freeze-thaw resistance low shrinkage AE concrete composition capable of obtaining a hardened body having a dry shrinkage rate reduced to ≤400 micro, and having excellent freeze-thaw resistance; and to provide a hardened body obtained by hardening the composition.SOLUTION: In an AE concrete composition including high-early-strength portland cement, water, fine aggregate, coarse aggregate, a drying shrinkage reducing agent, a cement dispersant and an air amount adjusting agent, a specific drying shrinkage reducing agent is used at the rate of a unit amount of 7-30 kg/m, and the unit amount ratio determined from expression 1: unit amount ratio (%)=(unit amount of water+unit amount of drying shrinkage reducing agent)/(unit amount of early strength portland cement)×100 (%), is controlled in the range of 30-43%. |
