| abstract |
(57) [Summary] [Problem] To significantly reduce the amount of rebound. SOLUTION: In the production method, cement c, fine aggregate s, coarse aggregate S and kneading water W which are constituent materials of concrete are prepared according to the mixing ratio, and kneading water W is primary kneading water W1. And the secondary mixing water W2 is divided into two, and the primary mixing is performed. The primary kneading is performed by adding the primary kneading water W1 to the cement c and the fine aggregate s. When the primary kneading is completed, the secondary kneading is performed next. In the secondary kneading, the coarse aggregate S, the secondary kneading water W2, and the starch-based thickener X are added to a mixture containing the cement c and the fine aggregate s kneaded in the primary kneading. . |