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Title |
Effect of Filler and Shrinkage Reducing Agent Influencing on Setting Shrinkage and Strength Properties of MMA-Modified Polymer Paste
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Keywords |
MMA 개질 폴리머 페이스트 ; 충전재 ; 수축저감제 ; 휨강도 ; 압축강도 |
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Abstract |
This article presents the results of experimental study that investigates the effect of filler and shrinkage reducing agent influencing on the strength properties of MMA-modified polymer paste that was produced to develop the surface-repair and coating materials of the concrete structures. Results show that the flexural and compressive strengths of the polymer paste increased 29 and 27%, respectively, when the aluminum hydroxide completely replaced the calcium carbonate as the filler Furthermore, when the shrinkage reducing agent was used 30%, both strengths decreased about 29% comparing to when the agent was not used. As in the cases of flexural and compressive strengths, the adhesive strength increased as the content of aluminum hydroxide as the filler increased, and it decreased as the content of shrinkage reducing agent increased. The adhesive strength with a dry concrete substrate turned out to be 30~40% higher than that with a wet concrete substrate.
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