초고강도 강섬유보강 콘크리트의 수축특성

Shrinkage Properties of Ultra High Strength Steel Fiber Reinforced Concrete

  • 고경택 (한국건설기술연구원 구조연구부) ;
  • 배장춘 (청주대학교 대학원) ;
  • 이건철 (충주대학교 산업과학연구소) ;
  • 강수태 (한국건설기술연구원 구조연구부) ;
  • 김성욱 (한국건설기술연구원 구조연구부) ;
  • 한천구 (청주대학교 건축공학부)
  • 발행 : 2005.11.01

초록

This paper is to investigate the shrinkage properties of ultra high strength concrete(UHSC) incorporating $5\%$ of expansive additives(EA) along with $1\%$ of shrinkage reducing agent(SRA). UHSC subjected to steam curing and incorporated with steel fiber exhibited higher compressive strength than control UHSC by as much as50MPa at 7days, while at 28days, noticeable change in compressive strength was not observed between UHSC mixtures. Control UHSC subjected to steam curing had a $922{\times}10^6$ of autogenous shrinkage strain value, which was 6.7 times of drying shrinkage strain value at 42 days. The combination of EA and SRA resulted in a decrease in autogenous shrinkage by as much as half of control mixture. Steam curing contributed to the reduction of autogenous shrinkage by as much as $11\%$ compared with that of standard curing.

키워드