Performance Evaluation of Multi-Size Chemically and Mechanically Treated Waste Tyre Rubber as Coarse Aggregate Replacement in Concrete
| International Journal of Civil Engineering |
| © 2025 by SSRG - IJCE Journal |
| Volume 12 Issue 11 |
| Year of Publication : 2025 |
| Authors : Sankuru Naresh, S. Kumaravel, M.S. Siva Kumar |
10.14445/23488352/IJCE-V12I11P117
How to Cite?
Sankuru Naresh, S. Kumaravel, M.S. Siva Kumar, "Performance Evaluation of Multi-Size Chemically and Mechanically Treated Waste Tyre Rubber as Coarse Aggregate Replacement in Concrete," SSRG International Journal of Civil Engineering, vol. 12, no. 11, pp. 229-243, 2025. Crossref, https://doi.org/10.14445/23488352/IJCE-V12I11P117
Abstract:
Sustainable reuse of waste tyre rubber in construction material is an effective path to alleviate environmental impact and landfill quantity. This research considered the performance of concrete mixes that partially replaced coarse aggregates with Chemically and Mechanically Treated (CMT) and Cement-Coated chemically and Mechanically Treated (CCMT) waste tyre rubber of varying sizes and volume replacement ratios. Sixty concrete mixes were produced using rubber sizes of 10, 12, 16, and 20 mm, to provide volumetric replacements of 5%, 10%, 15%, and 20%, respectively. In a separate production to optimize the 15% level, 24 blended multi-size mixes were developed using macro-to-micro aggregate gradation. The best blend of all mixes (M62) produced the highest compressive strength of 36.67 MPa, which was approximately 16.2% improved from the control mix (31.56 MPa). The flexural strength of the rubber blends was also favorable. Additionally, durability tests, water absorption, and acid attack demonstrated better bonding, as well as lower degradation of the treated rubber concrete compared to the control mix. The outcomes indicate that treated rubber aggregates blended with other aggregates at an optimized replacement level are structurally feasible and able to be environmentally sustainable alternatives to traditional coarse aggregates in concrete.
Keywords:
Waste tyre rubber, Multi-size aggregates, Chemical-mechanical treatment, Compressive strength, Durability, Sustainable concrete.
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