Flexural behaviour of self compacting concrete slabs using conventional steel bars and carbon fibers

In this paper the combination of conventional steel reinforcement and high-tensile chopped carbon fiber on the flexural behaviour of self compacting concrete slabs were investigated. The mix incorporated with various percentages of carbon fibers (0%, 0. 03%, 0. 06%, and 0. 1%) by concrete volume was used. The load failure for each slabs are presented and discussed. Steel bars reinforced self compacting concrete slabs without carbon fibers were also casted and tested. It was found that the use of combination of carbon fibers with conventional steel reinforcement increased the ultimate load carrying capacity at 0. 03% when compared with 0%, 0. 06% and 0. 1%. A reduction in bleeding is observed by addition of carbon fiber in the carbon fibre self compacting concrete cubes and slabs. A reduction in bleeding improves the surface integrity of concrete, improves its homogeneity, and reduces the probability of cracks.