Abstract: 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 designed 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 content. 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 addition of steel fiber has little influence on the compressive strength of SFRSCC. With the increase of steel fiber content, the compressive strength of SFRSCC decreases first and then increases.

Key words: steel fiber reinforced self-compacting concrete (SFRSCC), slump expansion, axial compression, compressive strength, compressive toughness