| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a nonshrink AE concrete composition capable of changing a hardened body into a substantially nonshrink state by suppressing shrinkage of an obtained hardened body to be 50 micro or less without exerting a bad influence on fluidity or an air entrainment amount of a prepared AE concrete composition or on compressive strength of the obtained hardened body, and capable of imparting excellent freeze-thaw resistance to the hardened body. <P>SOLUTION: In this nonshrink AE concrete composition containing portland cement, fine aggregate, coarse aggregate, a drying shrinkage reducing agent, an expanding material, a cement dispersant, an air volume controlling agent and water, specific blast furnace slag fine powder is used at a specific ratio as at least a part of the portland cement, and blast furnace slag fine aggregate is used at a specific ratio as at least a part of the fine aggregate, and simultaneously the drying shrinkage reducing agent and the expanding material are used at a specific ratio, and the ratio of unit amount is set to be within a specific range. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
