Evaluation the Effectiveness of Chopped Basalt Fiber on the Properties of High Strength Concrete

High amount of steel reinforcement content, durability and ductility issues has led the development of alternative types for reinforcement of high strength concrete HSC. Fiber Reinforcement (FR) of concrete has been investigated as strengthening materials with different techniques such as external and bar reinforcement. This is due to high contributions of the FR on the mechanical properties of HSC such as high compressive strength, toughness and ductility. Among the many types of FR have been used for this purpose, there are very few studies were conducted on developing new continuous basalt fiber in HSC. The main objective of this study is to investigate the effect of chopped basalt stands CBFS on the fresh and harden properties of HSC as a new internal strengthening material. This was done by changing of CBFS content in the mixture and comparing with 100% OPC of HSC. Experimental results showed that the workability of HSC affected negatively with increase of CBFS content. It is also shown that the early and long terms of compressive strength was not supported using the CBFS. Whereas, split and flexural tensile strengths were significantly improve. It was also observed that the brittleness was significantly decreased and its toughness and ductility were steadily improved. Therefore, it can be conducted that the CBFS is a suitable strengthening material to produce ductile HSC.