Experimental study of rubber particles from recycle tires as concrete aggregates

Abstract

The Waste tire is one of the largest waste contributors. Due to the abundant amount of waste tires that would require the proper way to utilize waste tires as an aggregate replacement in concrete. Crumb rubber is a fiber-shaped material, which is produced from shred or scrap of post-used tires from trucks. Tire Chips is a material that consists of small pieces of waste rubber tires. This study explores the ameliorative effects of rubber particles on some properties of concrete. The objectives of this work is to present the mechanical properties of concrete (compressive strength, modulus of elasticity and split tensile strength) with variations of crumb rubber + tire chips 0%, 10%, 20% and 30% on fine and coarse aggregate volumes. Two types of rubber particles (crumb rubber and tire chips) have been used in the rubberized concrete mixtures replacing partially natural aggregates. Cylinder-shaped test object with 100 mm in diameter and 200 mm in length. Compressive strength testing was conducted at 3, 14 and 28 days. While the modulus of elasticity and split tensile strength were tested at 28 days. The results showed that the weight of the concrete volume decreased by 3.5% in each addition of 10% crumb rubber + tire chips. Compressive strength and split tensile strength decreased with increasing the number of crumb rubber + tire chips in concrete. The decrease in compressive strength was 24% on the addition of up to 10% crumb rubber + tire chips, while the split tensile strength decreased by 16%. Adding more than 10% of crumb rubber + tire chips to fine and coarse aggregate volumes is not recommended.