M. Aziminezhad, S. Mardi, P. Hajikarimi, F. M. Nejad, A. H. Gandomi. “Loading Rate Effect on Fracture Behavior of Fiber Reinforced High-Strength Concrete Using Semi-Circular Bending Test.” Construction and Building materials (under review).
Abstract: Adding different types of fiber is one of the most common ways to enhance high strength concrete’s mechanical behavior. In this paper, the effect of loading rate and different type of fibers including glass, polypropylene, and steel were studied implementing semi-circular bending (SCB) test method. It was evaluated that the SCB test can be used as a rapid and simple method to measure fracture properties of fiber reinforced high strength concrete (HSC) including ductility, energy absorption, and loading capacity by considering the effect of loading rate on the parameters mentioned above. Specimens with glass fibers had shown the most ductile behavior among all specimens with different types of fiber. On the other hand, steel fibers provided higher strength and higher energy absorption for the specimens. While specimens with steel fibers are highly sensitive to loading rate in terms of peak load, this effect is not significant for specimens with glass and polypropylene fibers.