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

Korea Concrete Institute (한국콘크리트학회)
권호 표지

Evidence of TSA in Cement Matrix

시멘트 경화체중 TSA 현상에 대한 연구

  • Lee, S.T. (Department of Civil Engineering, Kunsan National University) ;
  • Kim, S.S. (Department of Civil Engineering, Daejin University) ;
  • Kim, J.P. (Department of Civil Engineering, Hanyang University) ;
  • Jung, H.S. (Korea Institute of Construction Technology) ;
  • Ryu, J.S. (Department of Civil Engineering, Hanyang University) ;
  • Moon, H.Y. (Department of Civil Engineering, Hanyang University)
  • Published : 2006.11.04
Download PDF
⟨ Previous Next ⟩

Abstract

TSA(thaumasite sulfate attack) is one of the important and prevailing phenomena to damage concrete structures by sulfate attack. In the present study, the thaumasite ($CaSiO_3{\cdot}CaSO_3{\cdot}CaSO_4{\cdot}15H_2O$) has been observed by the authors and other researchers in concrete samples in laboratory or field. Microstructural and mechanical observations clearly confirm that the thaumasite formation is greatly associated with sulfate attack indicating mass loss, expansion and spalling in the sample. This study summarizes the results of observation carried out by the authors and researchers on TSA which thaumasite formation has been identified.

Keywords