Effect of Steel Fiber on Fluidity and Compressive Strength of Ultra-high Performance Concrete

Abstract

The influence of steel fiber content on concrete fluidity and compressive strength was studied through the slump, expansion and compressive strength tests of ultra-high performance concrete specimens with different steel fiber content. The results show that the fluidity of concrete decreases obviously with the increase of steel fiber content, but this situation can be improved by adjusting the amount of water-reducing agent. With the increase of steel fiber content, concrete compressive strength increases obviously, but the higher the steel fiber content is, the better. When it exceeds a certain value, concrete compressive strength begins to decline.