Shrinkage and Compressive Properties of Polymer-Modified Mortars Using Redispersible Polymer Powders

Abstract

In this study, we investigated the shrinkage and compressive properties of polymer-modified mortars using redispersible polymer powders in the range of the P/C of 10% or less at the W/C of 35% and the S/C of 1.0. As a result, Autogenous shrinkage strain after deforming of polymer-modified mortars using acrylic redispersible polymer powders was almost the same regardless of the P/C. The acrylic redispersible polymer powders affected the drying shrinkage component of polymer-modified mortars. Drying shrinkage strain of polymer-modified mortars increased with increasing the P/C. Mass loss of polymer-modified mortars varied depending on the redispersible polymer powders used and its quantity. Compressive strength and Young's modulus of polymer-modified mortars tended to decrease with increasing the P/C. The effect of redispersible polymer powders on the compressive strength and Young's modulus of polymer-modified mortars was not so large. Poisson's ratio of polymer-modified mortars using acrylic redispersible polymer powders was about 0.2 regardless of the P/C.