| 摘要 |
PROBLEM TO BE SOLVED: To provide an ultrahigh strength (compressive strength of 65 N/mm2 or higher) concrete having low self-shrinkage. SOLUTION: This ultrahigh strength concrete having compressive strength of 65 N/mm2 or higher is a cured body of a blend mixture comprising an additive comprising a ground mixture of gypsum and a clinker composition or a ground mixture of gypsum, a clinker composition and quick lime, cement, water reducing agent, fine aggregate, coarse aggregate and water, where the clinker composition contains 50 to 92 wt.% of crystalline CaO and principal minerals of which is 3CaO.SiO2-2CaO.SiO2-CaO-interstitial material, 3CaO.SiO2- CaO-interstitial material, 2CaO.SiO2-CaO-interstitial material or CaO-interstitial material. Preferably slump flow value of the above blend mixture is 50 to 70 cm.
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