Original paper(Vol.49 No.4 pp.453)

Influence of polymer-cement ratio, water-cement ratio and air content on flow of fresh polymer-modified mortar and equation for predicting its flow

Tokumoto Minoru

Abstract:This paper presents the experimental results of the flow property of fresh polymer-modified mortars having cement/sand = 1/3 (by mass) with varying water-cement ratio (W/C) and air content at the various polymer-cement ratios (P/C), using carboxylic styrene-acrylic ester co-polymer dispersions.
The flow property of the fresh polymer-modified mortar was affected by the P/C, W/C and air content, especially, the P/C had a marked effect on the flow property.
The experimental regression equation for calculation of the flow value is derived from P/C, W/C and the air content as the coefficient and constant. The physical meaning of the effect of each item in the equation on the flow property was explained by the author.

Key Words:Polymer-modified cement, Polymer mortar, Flow, Air content, Styrene-acrylic ester copolymer, Defoamer