Performance evaluation of steel- polyester hybrid fiber reinforced concrete

Abstract

Energy absorption is an important property in the characterisation of Fiber Reinforced Concrete (FRC). This paper evaluates the energy absorption capacity and other mechanical properties of Hybrid-Fiber Reinforced Concrete (HyFRC). Steel and Polyester fibers are used as single type (FRC) and in combination (HyFRC) in a M45 grade composite. Load-deformation characteristics of hybrid fiber reinforced concrete under split tensile loading condition was carried out to evaluate the energy absorption capacity. Compressive strength, split tensile strength, modulus of rupture and impact strength of FRC and HyFRC were determined in addition to the energy absorption capacity. The performance of Control, Steel, Polyester and Hybrid fiber concrete specimens are compared and presented in this paper. It is found that energy absorption capacity, split tensile strength, modulus of rupture and impact strength values are largely improved due to the addition as well as the positive interaction between two different fibers. In case of compressive strength the improvement was marginal when fibers were added.