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http://dx.doi.org/10.4334/JKCI.2003.15.3.409

Drying Shrinkage and Strength Properties of Ultrarapid-Hardening Polymer-Modified Mortar Using Redispersible Polymer Powder  

Lee, Youn-Su (Research Center for & Rehabilitation Materials of Concrete, Juseong College)
Joo, Myung-Ki (Research Center for & Rehabilitation Materials of Concrete, Juseong College)
Publication Information
Journal of the Korea Concrete Institute / v.15, no.3, 2003 , pp. 409-416 More about this Journal
Abstract
The effects of polymer-cement ratio, antifoamer content and shrinkage-reducing agent content on the air content, setting time, drying shrinkage and strength of polymer-modified mortars using redispersible polymer powder are examined. As a result, the air content of the polymer-modified mortars using redispersible polymer powder tend to decrease with increasing polymer-cement ratio and antifoamer content. Regardless of the antifoamer content, the setting time of the polymer-modified mortars using redispersible polymer powder tend to delayed with increasing polymer-cement ratio. Irrespective of the antifoamer content, the drying shrinkage of the polymer-modified mortars using redispersible polymer powder tend to decrease with increasing polymer-cement ratio and shrinkage-reducing agent content. Regardless of the antifoamer content, the flexural and tensile strengths of the ultrarapid-hardening polymer-modified mortars using redispersible polymer powder tend to increase with increasing polymer-cement ratio, and tend to decrease with increasing shrinkage-reducing agent content. However, the compressive strength of the ultrarapid-hardening polymer-modified mortars using redispersible polymer powder decrease with increasing polymer-cement ratio and shrinkage-reducing agent content.
Keywords
polymer-modified mortar; polymer-cement ratio; shrinkage-reducing agent content; antifoamer content; setting time;
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