Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Flow Experiments and Analysis of Highly Flowable Concrete Considering the Effect of Dosages of SP Admixture and W/C Ratios

SP제 및 물시멘트비 영향을 고려한 초유동 콘크리트의 흐름 실험 및 해석

  • Cho, Chang-Geun (School of Architecture, Chosun University) ;
  • Kim, Wha-Jung (School of Architecture, Kyungpook National University) ;
  • Choi, Yeol (School of Architecture, Kyungpook National University)
  • 조창근 (조선대학교 건축학부) ;
  • 김화중 (경북대학교 건축학부) ;
  • 최열 (경북대학교 건축학부)
  • Received : 2013.10.04
  • Accepted : 2014.08.26
  • Published : 2014.12.31
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Abstract

In this research, flow experiments and simulation of highly flowable concrete has been attempted using a viscoplastic particle method varying with dosages of SP admixture and water-cement (W/C) ratios. Rheological and flow characteristics of flowable concrete manufactured in domestic products of cement, aggregates, and SP admixtures were investigated by experimental programs varying with mix proportions. From experiment, the predictive model of rheological characteristics of flowable concrete has been newly proposed considering with the effects of the W/C ratio and the dosage of SP admixture, and the effect of mixing proportion has also been incorporated into shear stress and strain rate curve of flowable concrete in the current method. A series of L-box flow test of highly flowable concrete varying with dosages of SP admixture and W/C ratios was compared with the proposed model.

본 연구는 SP제 및 물시멘트비 영향에 따른 변화를 고려한 초유동 콘크리트의 유동 실험 및 해석 시뮬레이션 기법에 관해 소개한 것이다. 국내에서 생산되는 시멘트, 골재 및 SP 혼화제를 대상으로 하여 배합조건에 따른 유동 콘크리트의 레올로지 특성 및 유동현상 실험을 수행하였으며, 이로부터 물시멘트비와 SP제의 영향을 고려한 유동 콘크리트의 레올로지 정수 추정에 관한 예측모델을 제시하였다. 제시된 두 배합조건에 의한 영향을 유동 콘크리트의 전단응력과 변형률속도 관계 정식화에 적용하여 본 해석 모델을 제시하였다. SP제 및 물시멘트비의 변화를 고려한 초유동 콘크리트의 L형 박스 흐름 실험을 수행하여 해석 시뮬레이션 모델과 비교하여 개발 모델에 대해 평가토록 하였다.

Keywords

References

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