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Results of experimental investigation of concrete containing waste tyre crumb rubber are presented in the paper to determine mechanical properties such as the compressive strength, splitting tensile strength, and flexural strength of concrete. The C35/45 compressive strength class concrete was used in this study. Five to twenty-five per cent of sand volume was replaced with waste tire crumb rubber, and the results were compared to ordinary concrete test results. The results revealed that the performance slightly increased by 1.46 % and 1.96 % at 5 % and 10% of crumb rubber replacement compared to ordinary concrete.