Utilization of tire chips as a substitute for coarse aggregate in concrete

Abstract

Abstract Tire chips are produced from the material shred or small pieces of truck tires into a size 0.5 - 3 in. Waste tires increase and are not easily biodegradable in environmental pollution, therefore it is necessary to pay special attention to the environment by using waste tires as an aggregate substitute in concrete. The objectives of this research are to determine the mechanical properties (compressive strength, splitting tensile strength and modulus of elasticity) of concrete by use tire chips of 0%, 10%, 20% and 30% as a substitute of coarse aggregate. Cylinder specimens with a diameter of 100 mm and a height of 200 mm. Compressive strength testing was conducted at 3, 14 and 28 days. While the modulus of elasticity and splitting tensile strength was conducted at only 28 days. The results show that the weight of concrete volume decreases 3% on each additional 10% of tire chips. Compressive strength and splitting tensile strength also decreased with increasing content of tire chips. A decrease in the average compressive strength of 18% in addition to 10% of tire chips, while the splitting tensile strength decreased by 26%. Modulus of elasticity follows the trend of concrete compressive strength and its value is almost equal between experimental and theoretical. The substitutions of tire chips more than 10% of the volume of coarse aggregate is not recommended.

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