抄録
The purpose of this study is to investigate the influences of polymer composition and protective layer of redispersible polymer powders on the properties of polymer-modified mortar susing ordinary portland and ultra rapid hardening cements. Polymer-modified mortars are prepared with ordinary portland and ultra rapid hardening cements, and six types of redispersible polymer powders, and tested for workability, strength, drying shrinkage, porosity and X-ray diffraction quantitative analysis of cement hydrate. It is concluded from the test results that the properties of the polymer-modified mortars are influenced by the protective layer of the redispersible polymer powders. The effectiveness of the redispersible polymer powders depends on the cement used. The properties of the polymer-modified mortars are not related with pore size distribution.
