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Setting Shrinkage, Coefficient of Thermal Expansion, and Elastic Modulus of UP-MMA Based Polymer Concrete

UP-MMA 폴리머 콘크리트의 경화수축, 열팽창계수 및 탄성계수

  • Yeon, Kyu-Seok (Dept. of Regional Infrastructure Engineering, Kangwon National University) ;
  • Yeon, Jung-Heum (Center for Transportation Research at the University of Texas at Austin)
  • 연규석 (강원대학교 지역건설공학과) ;
  • 연정흠 (미국 텍사스대 교통연구센터)
  • Received : 2012.05.07
  • Accepted : 2012.07.04
  • Published : 2012.08.31

Abstract

This study examines setting shrinkage, coefficient of thermal expansion, and elastic modulus of unsaturated polyester( UP)-methyl methacrylate(MMA) polymer concrete, which is generally used for repair of portland cement concrete pavement and manufacturing of precast products. In this study, a series of laboratory test were conducted with variables such as UP-MMA ratio, shrinkage reducing agent (SRA) content, and test temperature. The results showed that the setting shrinkage ranged from 29.2 to $82.6{\times}10^{-4}$, which was significantly affected by test temperature. Moreover, the findings revealed that the coefficient of thermal expansion, elastic modulus and ultimate strain of UP-MMA based polymer concrete ranged from 21.6 to $31.2{\times}10^{-6}/^{\circ}C$, 2.8 to $3.3{\times}10^4$ MPa, and 0.00381 to 0.00418, respectively. The results of this study will be used as important data for design and application of UP-MMA based polymer concrete.

이 연구는 시멘트 콘크리트 포장의 보수나 프리캐스트 제품용으로 사용되는 UP-MMA 폴리머 콘크리트의 경화수축, 열팽창계수 및 탄성계수에 대한 연구이다. 이를 위해 UP-MMA비, SRA 첨가량, 시험온도 등을 변수로 하여 경화수축 시험과 UP-MMA비에 따른 열팽창과 압축응력-변형률에 대하여 시험을 실시하였다. 그 결과 경화수축은 29.2~$82.6{\times}10^{-4}$으로 UP 비율과 시험온도에 큰 영향을 받는 것으로 나타났다. 그리고 열팽창계수는 21.6~$31.2{\times}10^{-6}/^{\circ}C$, 탄성계수는 2.8~$3.3{\times}10^4MPa$, 극한변형률은 0.00381~0.00418이었으며, 이는 UP-MMA비에 크게 영향을 받는 것으로 나타났다. 이러한 결과들은 UP-MMA 폴리머 콘크리트의 적용을 위한 설계에 중요한 기초자료로 이용될 수 있을 것이다.

Keywords

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