INFLUENCE OF AGGREGATE ON PROPERTIES OF SELF-CONSOLIDATING CONCRETE

摘要

This paper deals with the influences of volume content,type and maximum size of aggregate size on properties of self-consolidating concrete(SCC)such as workability,strength,elastic modulus and shrinkage.Results indicates the flowability,filling capability and stability of fresh SCC are greatly influenced by ratio of volume between coarse aggregate and fine aggregate and there exists an optimum ratio to achieve the best workability of SCC best.Compared with crushed stone,gravel is more effective in improving flowability,filling capability and stability of fresh SCC.The decrease of maximum size of coarse aggregate also benefits to stability of fresh SCC.Under the same aggregate volume condition,the compressive strength and split strength and elastic modulus of SCC reduce,however,the drying shrinkage increase with the increase of fine aggregate volume.The compressive strength,split strength,elastic modulus and drying shrinkage of SCC made with crushed stone were higher than those of SCC with gravel.