HIGH FLUIDITY ULTRAHIGH EARLY-STRENGTH ADMIXTURE AND HIGH FLUIDITY ULTRAHIGH EARLY-STRENGTH CONCRETE

摘要

PROBLEM TO BE SOLVED: To provide a high fluidity ultrahigh early-strength admixture giving a concrete using a general-purpose cement and added with an admixture which exhibits a ratio of slump flow value at 120 minutes after kneading to slump flow value just after kneading is ≥80% and having a ≥10 N/mm² compressive strength in 1 day material age, and to provide its high fluidity ultrahigh early-strength concrete.;SOLUTION: The high fluidity ultrahigh early-strength admixture includes soluble cellulose, alkali sulfate and a polycarboxylic acid-based water-reducing agent, in which the viscosity of a 1% concentration aqueous solution of the soluble cellulose at 20°C by a rotational viscometer is ≤20 mPa S at neutral, and 1,000-10,000 mPa S at a pH of 12 to 13, and the high fluidity ultrahigh early-strength concrete includes the admixture.;COPYRIGHT: (C)2009,JPO&INPIT