Proceedings of the Korea Concrete Institute Conference (한국콘크리트학회:학술대회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Deterioration of Cement Matrix with Alkali-free Accelerator Exposed to Sulfate Media

황산염환경에 노출된 알카리프리계 급결제 사용 시멘트경화체의 성능저하

  • Lee, Seung-Tae (Department of Civil Engineering, Kunsan National University) ;
  • Hooton, R.D. (Department of Civil Engineering, University of Toronto) ;
  • Kim, Seong-Soo (Department of Civil Engineering, Daejin University) ;
  • Kim, Dong-Gyou (Korea Institute of Construction Technology)
  • Published : 2006.05.11
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Abstract

This paper presents the findings on the sulfate resistance of mortar specimens with or without alkali-free accelerator exposed to sodium sulfate solution for 270 days. Test results confirms a negative effect of alkali-free accelerator on the sulfate deterioration. Additionally, the influences of exposure concentration and temperature of sulfate solution on expansion were investigated. Especially, at a high concentration of solution a significant expansion of mortar specimens with alkali-free accelerator was observed. Further, low temperature also promoted the deterioration of the cement system due to sulfate attack.

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