DUST REDUCTION TYPE LIQUID ADMIXTURE AND PRODUCTION OF CONCRETE FOR WET SPRAY TECHNIQUE WHEREIN THE SAME IS USED

摘要

PURPOSE: To secure fluidity of concrete for a long time and to achieve inhibition of dust, reduction of the degree of rebounding and enhancement of the quick setting effect of a quick setting agent and compression strength in a long period in a wet spray technique wherein the quick setting agent is added to previously kneaded concrete to apply this mixture. ;CONSTITUTION: A dust reduction type liquid admixture is constituted of water soluble cellulose ether, water soluble polycarboxylate of 0.1-10 times quantity thereof and water. In a method for producing concrete with the dust reduction type liquid admixture used therefor, the liquid admixture is added at 0.01-1.5wt.% of the weight of cement expressed in terms of solid to previously kneaded concrete.;COPYRIGHT: (C)1993,JPO&Japio