Measuring Impact Resistance of High Strength Steel Fiber Reinforced Concrete

Abstract

Impact resistance is a requirement for many applications in civil engineering such as pavements, industrial floors, overlays, and slabs on grade. Although there are many test methods to measure the impact resistance of fiber reinforced concrete (FRC) most of them are complicated, time consuming, expensive and not applicable for high strength fiber reinforced concrete (HSFRC). A practical test method has been developed for HSFRC to measure its impact resistance. The equipment developed is also used for testing aggregate impact values by simply changing the base plate of the machine. In this study the influence of silica fume on the properties of HSFRC was investigated by using silica fume at two different percentages and three different hooked-end fibers namely, 30/.50, 60/.80 and 50/.60 length/diameter (mm/mm). Fibers were added to concrete in three different volume percentages of 0.5, 1.0 and 2.0 % by volume of concrete.