Development and Property Analysis of Segregation-Reducing Type Flowing Concrete Using the Viscosity Agent

증점제를 이용한 분리저감형 유동화 콘크리트의 개발 및 그 특성분석

  • 한천구 (청주대학교 건축공학과 교수, 공박) ;
  • 강의영 (청주대학교 건축공학과) ;
  • 오선교 (청주대학교 건축공학과) ;
  • 반호용 (청주대학교 건축공학과 교수, 공박)
  • Published : 1999.08.01


When superplasticizer is added to manufacture flowing concrete, the base concrete usually needs the adjustment to assure the sufficient fines contained to obtain flowable consistency without excessive bleeding or segregation. However, this may not only increase the cost, but also cause inconvenience in producing the base concrete. In this paper, the experiments are performed on normal base concrete to achieve a segregation-reducing flowing concrete by adding superplasticizer mixed with viscosity agents and AE admixtures. Three kinds of superplasticizer and two kinds of viscosity agent are selected. According to the results, with regard to the performance and cost of the admixtures, melamine type superplasticizer combined with the PEO viscosity agent and AE admixtures at the ratio 1:0.28:0.001 can acquire good quality and reduce the cost in producing the flowing concrete. With proper addition of combined superplasticizer, even though water to cement ratios of the base concrete are different, the segregation-reducing flowing concrete could be also achieved without reproportioning of the base concrete. However, it would be more desirable if the superplasticizer could be adjusted, before it is put into the practical use in order not to cause some other problems, such as rapid rate of slump loss and retarding of setting time.


segregation-reducing type flowing concrete;viscosity agent;combined superplasticizer


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