A FUNDAMENTAL STUDY OF EVALUATION OF EFFECTS OF MINERAL POWDERS ON FLUIDITY AND BLEEDING OF CONCRETE

In this study, we investigate the influence of powders on the fluidity and bleeding of two types of concretes. One is the influence of powders on the fluidity of high fluidity concrete. The other is the influence of powders on the bleeding of concrete. In our investigation, the three types of mineral powders, each of them has two finess, are used in different replacement ratio to make different particle size distribution of powders and to make different surface nature against water. Within the limits of our investigation, the surface nature of every powder is quantitatively represented based on the surface area of cement particles, also the apparent properties of every concrete are explained by the idea based on the properties of corresponding powders.