METHOD FOR INCREASING INITIAL STRENGTH OF HIGHLY FLUID CONCRETE

摘要

PURPOSE:To accelerate the setting speed and strength developability of highly fluid concrete for which high early strength is required and to increase its initial strength by adjusting the compsn. of a binder contg. an admixture. CONSTITUTION:This method is a material reinforcing method to increase the initial compressive strength at the material life 10-hour index of the highly fluid concrete in proportion to the amt. of fly ashes to be added, in which a calcium aluminate setting control material is used as an initial strength promoting material and the fly ashes are added thereto to substitute part of the cement of the binder compsn. with the fly ashes. The substitution rate of the fly ashes with the cement is confined to <=60%. The content or substitution rate of the calcium aluminate setting control agent with the binder is specified to 5% in some cases.