EVALUATION OF INTERNAL STRESSES AND ITS IMPACT ON THE CONCRETE/CEMENT MORTAR MASS PREPARED WITH RECYCLED DEMOLISHED CONCRETE AGGREGATES

In Concrete /Cement Mortar Mass a significant study was made on the applied stress and on this applied stress the design criteria of the structures have been finalised and a limited study on the internal built in stress was made and minimal studies on its effects. Since, in any material the internal stress, i.e. residual stress plays a vital role and it defines the internal anatomy and its behaviour. The present research work concentrates on the studies done in assessing the residual stress i.e. macro and micro stress and its impact on the concrete /cement mortar mass prepared with untreated and treated recycle demolished coarse and fine aggregates and compared with that of concrete/mortar mass prepared with that of conventional aggregates. The XRD is used to evaluate the macro and micro stress and on the obtained results it was found that type of stress developed plays a vital role in defining the internal integrity of the structure and the amount of the stress play a significant role in the performance of the concrete/mortar mass and the residual stress developed decides the durability of the structure in terms of its fatigue life, resistance to corrosion and the dimensional stability overall.