Fracture and flexural behavior of high performance fiber reinforced concrete

Traditionally design of concrete will be a function of strength and not as a function of durability. To meet the requirements of durability in addition to strength,high performance concrete was developed. In this paper a detailed experimental investigation was carried out to evaluate the mechanical and durability characteristics of high performance fiber reinforced concrete to understand the effect of fibers. Experiments were conducted for three different water-binder ratios of 0.225,0.25 and 0.275. Similarly three different volumes of fiber namely 1,1.5 and 2% of volume of concrete were used. The characteristic compressive strength of concrete was taken as 70 MPa. Properties such as compressive strength,load deflection characteristics and porosity were studied. It was inferred from the results that high performance concrete with 1.5% volume of fiber with water-binder ratio of 0.25 performed well. Load carrying capacity of high performance fiber reinforced concrete was found to be higher than the control concrete.