Research on the influence of machine-made sand gradation and fineness modulus on the workability and rheological properties of mortar

Abstract

The gradation and fineness modulus of machine-made sand are important factors affecting the performance of mortar. By studying the influence of different machine-made sand gradation and fineness modulus on the workability and rheological properties of mortar, the gradation and fineness of machine-made sand are explored. The relationship between modulus and mortar fluidity, yield stress and plastic viscosity. Research shows that with the increase of the cumulative screening rate and fineness modulus of machine-made sand with different gradations, the fluidity of the mortar increases and the workability of the mortar increases. The cumulative screening rate and fineness modulus of machine-made sand are negatively correlated with the yield stress and plastic viscosity of the mortar. The cumulative screening rate and fineness modulus of machine-made sand have a good correlation with the yield stress of the mortar, and the mechanism is 1.18-0.6mm Sand gradation is significantly negatively correlated with the yield stress of mortar, and the cumulative sieving rate and fineness modulus of machine-made sand have poor correlation with the plastic viscosity of mortar.