ABSTRACT
The paper describes the construction and instrumentation of a repeated drop-weight impact testing apparatus. The apparatus has two main variables - mass of drop-weight (ranging from 1 to 4 kg) and drop-height (up to 2.5m). The instrumentation comprises two load cells and a number of accelerometers. The two load cells are used to monitor the impact load and the reaction response at the support. The test results (which are recorded by means of a Signal Memory Recorder) include peak impact load, impulsive load, accelerations etc. The apparatus has been used to study flexure, shear and torsion strength of steel and polypropylene fibre reinforced concrete. Typical results are presented for a 2% (by weight) steel fibre reinforced concrete.
