Behavior of Fiber-Reinforced Concrete Slabs Under Low Velocity Projectile Impact
K. C. G. Ong, P. Paramasivam and M. Basheerkhan
Appears on pages(s):
Concretes; cracking (fracturing); deflection; fiber-reinforced concrete;
fibers; impact; impact resistance
An investigation was carried out to study the effect of steel fibers in improving the performance of concrete under impact loading. Both conventionally reinforced and fiber reinforced concrete slabs were considered. 50mm thick slabs of size 1OOOmm square clamped on all four edges were tested on a span of 900mm. Hooked-end steel fibers having an aspect ratio of 60 with volume fractions of 1% and 2% were studied. The instrumented drop-weight impact setup developed is capable of dropping a 40kg mass from heights of up to 4.5m. The transient impact load on the instrumented striking head, accelerations of the slab, steel strains, and concrete strains, were all recorded using a high-speed data acquisition system. The cracking pattern and the damage due to impact were examined. The study confirmed the superior impact resistance of steel fiber reinforced concrete.