Preparation and Physicochemical Properties of Concrete Slump-Loss Resistance Agent for Small Slump
By the application of esterification-polymerization two-step synthesis method, comb-shaped polycarboxylate slump-loss resistance agent XBT for small slump concrete is prepared by controlling ester ratio. The experimental results of concrete and fresh cement paste indicate that XBT has excellent function of plasticity retention in small slump concrete. The experiment of gel permeation liquid chromatogram shows that XBT has wide range of molecular weight distribution, which may be the source of fine plasticity retention performance in the small slump concrete. The combined experiment between ultraviolet and conductivity indicates that there is strong adsorptive action between XBT and Ca2+, and their adsorptive characteristics may be closely related to the plasticity retention properties.
G. R. Duan et al., "Preparation and Physicochemical Properties of Concrete Slump-Loss Resistance Agent for Small Slump", Advanced Materials Research, Vols. 168-170, pp. 2158-2164, 2011