Investigation of replacing aggregate with non-homogeneous waste tire rubber aggregate in concrete

This article investigates the impact of using non-homogenous rubber aggregate on a developed concrete mix design. Identifying the dominant reasons and modifications to be made to improve the properties of rubberized concrete are discussed with respect to the diverse number of literatures. The recycled waste tire rubber particles were tested to identify the physical properties of rubber aggregate and twelve rubberized concrete cubes were tested in axial compression. The cubes were produced by replacing waste tire rubber with 1) 0% aggregate volume (Series 1) 2) 20% fine aggregate volume (Series 2) and 3) 10% coarse and 10% fine aggregates of the total aggregate volume (Series 3). The results show a high-water absorption rate of 6-7% in rubber aggregate. The compressive strength of cubes reached up to 48.6 MPa, 32.4 MPa, and 37.5 MPa in Series 1, 2, and 3, respectively. Implementing 10% coarse and 10% fine rubber aggregate enhanced the compressive strength by 10.5%. There is clear evidence on improved mechanical properties of rubberized concrete with the addition of non-homogenous rubber aggregates.