“…In this experiment, the slump value of normal concrete is less than of CRA and RA concrete. This experiment shows that coated rubber aggregate and rubber aggregate gives high workability of concrete [2]. This investigation shows that the workability rubber aggregate of concrete is better than normal concrete that's results are 32, 38, 41 and 49 in mm according to 0%, 10%, 25% and 50% for M15 grade and 7, 14, 21 and 42 in mm according to 0%, 10%, 25% and 50% for M25 grade [3].…”