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http://dx.doi.org/10.4334/JKCI.2007.19.4.457

Strength Properties of Polymer-Modified Repair Mortars According to Curing Conditions and Repair Methods  

Kim, Wan-Ki (Major in Architectural Engineering, Hyupsung University)
Jo, Young-Kug (Dept. of Architectural Engineering, Chungwoon University)
Publication Information
Journal of the Korea Concrete Institute / v.19, no.4, 2007 , pp. 457-465 More about this Journal
Abstract
In this paper, polymer-modified repair materials using polymer dispersions with six repair methods are prepared with various polymer-cement ratios, and tested for compressive and flexural strengths through each curing condition such as dry cure, water cure, and freezing and thawing cyclic action. And, the adhesive interface between the polymer-modified mortar and mortar substrate is observed by a scanning electron microscope. From the test results, the compressive and flexural strengths of cement mortar repaired by polymer-modified mortar are improved with a rise in the polymer-cement ratio regardless of the type of polymer and curing conditions. Such an improvement in the strengths of polymer-modified repair materials to ordinary cement mortar is explained by the high adhesion of polymer-modified mortar. Strength reduction of polymer-modified repair materials after freezing and thawing cyclic actions is recognized, but it is lower than that of unmodified mortar. Especially, cement mortar repaired by polymer-modified mortar with a St/BA emulsion has good strength properties compared with those of SBR latex and PA emulsion. Accordingly, it is judged that polymer-modified mortars with a St/BA emulsion are possible to use as repair materials to ordinary cement mortar and concrete.
Keywords
polymer-modified mortar; compressive and flexural strength; dry cure; water cure; freezing and thawing action;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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