Analysis on the solidification process of binary mixtures using a modified continuum model

학위논문(박사)--서울대학교 대학원 :기계공학과,1996.Docto

THE INTRODUCTION OF PROTEINASE INHIBITOR II (PI-II) GENE INTO FLOWERING CABBAGE, BRASSICA OLERACEA VAR. ACEPHALA DC

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An Experimental Study for Crack Prevention of Floor Mortar

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