Influence of mineral aggregates on the rheological properties of concrete mixture

1st International Conference on Rheology and Modeling of Materials

物理学;材料科学

Klovas, A.^1 ; Daukys, M.^1

Department of Civil Engineering Technologies, Kaunas University of Technology, Studentu str. 48, Kaunas

LT-51367, Lithuania^1

关键词: Coarse aggregates;    Fine aggregates;    Fine particles;    Mineral aggregate;    Plastic viscosity;    Rheological property;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/602/1/012009/pdf
DOI  :  10.1088/1742-6596/602/1/012009

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The aim of this research was to determine how the change of concrete mixture constituents: concentration of fine and coarse aggregate as well as the amount of fine particles, not exceeding 0.25 mm, influence concrete mixture's rheological properties. Firstly, inner- concentration of fine aggregate (sand, fraction of 0/1 and 0/4) was changed. Secondly, coarse aggregate (gravel, fraction of 4/16) concentration was changed and finally, the amount of fine particles was changed. Results have shown that with the increase of sand (fraction of 0/1) quantity, the plastic viscosity also increased. On the other hand, yield stress, at the beginning decreased, but eventually - increased. The increase of coarse aggregate quantity acted differently: plastic viscosity and yield stress decreased. Finally, the increase of fine particles quantity decreased the plastic viscosity as well as yield stress of concrete mixture.