Abstract
In this study, the properties of rubberized concrete were examined and finite-element (FE) models were developed to investigate the accuracy of a current concrete material model in predicting the compressive behavior of rubberized concrete. The rubber particles, with a size of 1.18 mm were used at 0 %, 6 %, 12 %, and 18 % volume replacement of fine aggregate, keeping the proportions of gravel, water, and cement the same in all mixtures. Cylindrical and beam specimens were prepared and tested to evaluate the effect of rubber content on the density, compressive strength, elastic modulus, and damping ratio of the concrete. The results indicated that the damping ratio of rubberized concrete increased by 5.5 %, 27.8 %, and 64.8 % with rubber replacement of 6 %, 12 %, and 18 %, respectively. In addition to the experimental study, non-linear finite-element analysis was carried out using LS-DYNA software (Livermore Software Technology Corporation). The FE model developed in this paper was able to closely simulate the compressive behavior of the rubberized concrete specimens. The stiffness, compressive strength, volumetric response, and the dilation behavior obtained using the FE analysis agreed well with the values measured in the experimental work. The results show that the current concrete material model can be considered for rubberized concrete, provided that the compressive strength is modified to account for the reduction in strength caused by the added rubber.