Effect of Partial Replacements of Sand by Waste Rubber on the Low Impact Resistance of Concrete

Effects of partial replacements of sand by waste fine rubber on the long term performance of concrete under low impact three-point bending loading were investigated. Specimens were prepared for 5% and 10% replacements by volume of sand. For each case, three beams of 50 mm ×75 mm × 350mm were loaded to failure in a drop-weight impact machine by subjected it to 20 N weight from 400mm height. In general the experiment appeared that the impact strength increases with increase the percentage of sand replacement by waste fine crumb rubber.