HIGH-EARLY-STRENGTH CEMENT ADMIXTURE AND CONCRETE AND CONCRETE PRODUCT CONTAINING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain a cement admixture showing good workability and high early strength and to produce concrete and a concrete product containing the admixture. SOLUTION: The high-early-strength cement admixture consists of a clinker composition containing one or more kinds of 3CaO.SiO2-2CaO.SiO2-CaOa gap material, 3CaO.SiO2-CaO- a gap material, 2CaO.SiO2-CaO- a gap material and CaO- a gap material as the main mineral composition and containing 50 to 92 wt.% of CaO crystal, or it consists of a mixture pulverized material of the clinker composition and quicklime and gypsum.