Compressive strength and ultimate strain of concrete under impact loading

A drop-hammer test has been used to measure the compressive strength, ultimate strain, energy absorption and deformation modulus of concrete cubes under impact loading. By assuming a trapezoidal function for both the hammer impact pulse and the cube impedance function, hypothetical load and strain records have been derived which are similar to the initial experimental records measured on an oscilloscope. Concretes with varying mix proportions and two different coarse aggregates were examined and the results for compressive strength and ultimate strain are reported.