Used tires are considered solid waste, only half of which is recycled and the rest form part of landfills. The use of ground tire rubber (GTR) in concrete as partial replacement of aggregate is one of the ways to manage this waste. This review summarizes studies on rubberized concrete replacing fine or coarse aggregates with GTR. In fresh state, slump decreases by 80% for GTR replacement of 30% and the density drops by 3% when the rubber content is 15%. As GTR content rises, tensile strength, flexural strength, Young's modulus, and compressive strength of concrete decrease. The compressive strength and Young's modulus decrease by 12% to 58% and 2.4% to 31.7%, respectively, when the rubber content changes from 5% to 25%. However, the ductility is reported to increase by up to 90% and the fatigue life increased up to 10% when rubber content is 25%. Moreover, the durability characteristics like water absorption and chloride penetration increase up to 20%, 56% when rubber content is 20%. On the other hand, rubber enhances abrasion resistance and thermal properties. Research indicates that using treatment and adding supplementary cementitious material will improve characteristics of rubberized concrete. The potential for usage of rubber in structural concrete seems limited, however, non-structural applications can be promising, and research needs to focus on the possibility of using rubberized concrete in non-structural applications. To materialize the use of rubberized concrete, it is essential to identify the benefits of GTR in concrete characteristics essential for non-structural applications.

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Use of Ground Tire Rubber in Concrete – A Review and Way Forward

  • Arwa Al-Abri,
  • Muhammad Bilal Waris,
  • Khalifa Al-Jabri,
  • Kazi Md Abu Sohel

摘要

Used tires are considered solid waste, only half of which is recycled and the rest form part of landfills. The use of ground tire rubber (GTR) in concrete as partial replacement of aggregate is one of the ways to manage this waste. This review summarizes studies on rubberized concrete replacing fine or coarse aggregates with GTR. In fresh state, slump decreases by 80% for GTR replacement of 30% and the density drops by 3% when the rubber content is 15%. As GTR content rises, tensile strength, flexural strength, Young's modulus, and compressive strength of concrete decrease. The compressive strength and Young's modulus decrease by 12% to 58% and 2.4% to 31.7%, respectively, when the rubber content changes from 5% to 25%. However, the ductility is reported to increase by up to 90% and the fatigue life increased up to 10% when rubber content is 25%. Moreover, the durability characteristics like water absorption and chloride penetration increase up to 20%, 56% when rubber content is 20%. On the other hand, rubber enhances abrasion resistance and thermal properties. Research indicates that using treatment and adding supplementary cementitious material will improve characteristics of rubberized concrete. The potential for usage of rubber in structural concrete seems limited, however, non-structural applications can be promising, and research needs to focus on the possibility of using rubberized concrete in non-structural applications. To materialize the use of rubberized concrete, it is essential to identify the benefits of GTR in concrete characteristics essential for non-structural applications.