Abstract
The influence of the short cut fiber on the fracture parameters of high strength mortar matrix was investigated in order to obtain a basic information on the fracture behavior of high-strength fiber reinforced concrete(HFRC). Three-point bending tests on pre-notched mortar beam specimens which containing short cut fibers were performed. Various kinds of short cut fibers were used for the specimens. Fracture parameters of the specimens were analyzed based on the poly-linear approximation analysis of the tension softening diagram with the data of a load-load point displacement curve. As the results, the use of short cut fibers was significant on the improvement of the toughness of high-strength mortar, and the appropriate fiber which improving the toughness of high-strength mortar was clarified. The fracture parameter proposed in the paper, such as toughness modulus(T.M.) , R-curve, was effective on estimating the toughness of fiber reinforced cementitious composites.
