EXPERIMENTAL BEHAVIOUR OF WASTE TYRE RUBBER AGGREGATE CONCRETE UNDER IMPACT LOADING

In reinforced concrete design an important consideration that can be added to the requirements of strength and serviceability is ductility. This consideration is of importance to determine the amount of redistribution of moment that is possible in limited state design. Also, it is of importance in seismic design because to survive a severe earthquake, a structure should be capable of absorbing and dissipating energy by post-elastic deformations. To have an idea about the energy dissipation and ductility, it is essential to conduct impact test. An attempt is made in this paper to cast and test the cylindrical specimens made of Plain Cement Concrete (PCC) and Waste Tyre Rubber Aggregate Concrete (WTRAC) for impact loads with a steel ball drop weight. The test results show that the WTRAC with 6% replacement of both fine and coarse aggregate with rubber aggregates considerably improves the impact resistance and ductility characteristics. Regression model has been developed to estimate the impact strength for WTRAC specimen.