Experimental investigation on the influence of steel fiber on the workability and compressive toughness of self-compacting concrete
For steel fiber reinforced self-compacting concrete(SFRSCC),the fiber content is one of the important factors affecting its performance.In order to investigate the influence of the steel fiber content on the performance of SFRSCC,six sets of specimens with different proportions of steel fiber were de-signed and fabricated to test their workability and mechanical performance under axial compression.The results show that the addition of steel fiber effectively delays the crack development,increases the peak strain of SFRSCC.The equivalent compressive toughness index increases with the increase of fiber con-tent.The addition of steel fiber reduces the fluidity of freshly mixed concrete,and the shape factor related to rheological behavior of SFRSCC is less than that of ordinary self-compacting concrete(SCC).The addi-tion of steel fiber has little influence on the compressive strength of SFRSCC.With the increase of steel fi-ber content,the compressive strength of SFRSCC decreases first and then increases.
万方数据
维普
