PRODUCTION OF CONCRETE HARDENED BODY OR MORTAL HARDENED BODY

摘要

PURPOSE: To shorten precuring time before steam curing and to improve the strength of a hardened body at the time of producing a concrete cured body or a mortal cured body by the steam curing. CONSTITUTION: A part of a fine aggregate in a kneaded material containing cement, aggregate and water is replaced by a fine powder of a concrete scrap. The fine powder of the concrete scrap is preferably <=0.3mm in particle size and is replaced preferably by 0.5-30wt.% of the fine aggregate in internal ratio.