바닥용 모르타르의 균열방지를 위한 실험적 연구

An Experimental Study for Crack Prevention of Floor Mortar

  • 정재동 (대구대학교 건축공학과) ;
  • 김진근 (한국과학기술원 토목공학과) ;
  • 최응규 (삼성물산(주) 건설부문) ;
  • 이칠성 (한국과학기술원 토목공학과) ;
  • 이상순 (한국과학기술원 토목공학과)
  • 발행 : 1996.04.01

초록

Recently, the mortar crack on floor is very serious in construction field, e.g. the crack due to plastic shrinkage and the crack due to drying shrinkage. To prevent this kind of crack, optimum mix propertions not only satisfying the required workability but also minimizing the unit water content were selected. And the expansion admixtures were used to compensate the shrinkage of mortar. This study shows that water/cement ratio used in construction field is about 64%. Even if we reduce water/cement ratio of mortar by the appropriate use the fine aggregate with high fineness modulus and superplastizer, floor mortar can have the required workability. The equations between mortar flow and water/cement ratio, sand/cement ratio, fineness modulus of fine aggregate were proposed in this study. And this equation may provide available mix proportions of floor mortar.

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