Comparative of the Use of Carbon and Steel Fiber to the Mechanical Properties of Self Compacting Concrete

Abstract

This research is a comparative study, the use of carbon fiber and steel fiber for Self-Compacting Concrete (SCC). In previous studies, it was proven that the addition of steel fibers can increase the compressive and tensile strength of SCC. While carbon fiber is one of the most widely used materials for structural reinforcement in recent years. Therefore it is necessary to do a comparative study of the use of carbon fiber if applied to SCC. The percentage increase in carbon fiber and steel is 0.5%, 1%, and 1.5%. Then do the testing of: slump test, compressive strength, tensile strength and flexural strength. The results showed the optimal percentage of steel fiber addition of 1.5%, can increase the compressive strength of SCC by 11%. However carbon fiber and steel do not increase the tensile strength of SCC, and tend to reduce flexural strength. Other results show that carbon fiber is not suitable for use in SCC.

Study on Mechanical Properties of Concrete with Different Steel Fiber Content

“…After reaching the peak stress, it entered the stage of crack instability and propagation, and the crack developed rapidly, and the splitting sound in the specimen became more obvious, which indicated that steel fiber played a more significant role in cracking resistance. In the descending section of the curve, the slope was negative; it first reached an inflection point, then reached the point of maximum curvature, and finally, the curve slowly descended, tended to be flat, and entered the stage of residual strength [23]. The workability and workability of the fresh concrete mixture did not changed obviously, and the mixing of steel fiber did not change the mixture ratio of raw materials.…”