Mechanical Properties of Concrete with Crumb Rubber (Waste Tyre) As Partial Replacement of Fine Aggregate Under Dynamic Loading

R. O. Alebiosu, I. A. Chukwujama, U. N. Wilson, J. Esani, M. J. Kaura, O. C. Eze

Abstract


The global accumulation of scrap tyres poses serious environmental issues. Recycling tyres into crumb rubber (CR) for use in concrete is a sustainable solution to reduce waste while increasing concrete ductility. This study looks at the mechanical and dynamic characteristics of crumb rubber concrete (CRC) with 0-15% fine aggregate replacement. Compressive, tensile, and flexural strength were tested, as well as modulus of elasticity and impact resistance; ABAQUS/Explicit simulations using the Concrete Damaged Plasticity (CDP) model supplemented the tests. The results demonstrated decreased workability (slump 10-19mm; compacting factor 0.88-0.91) and decreased compressive strength from 29.3 MPa (control) to 24.1, 21.6, and 18.3 MPa at 5%, 10%, and 15% CR, respectively. However, ductility and impact resistance improved dramatically; with impact energy absorption up to 45% at 15%, CR. Simulations confirmed these findings, demonstrating lower peak stress but increased energy dissipation and slowed crack development. Optimal performance was achieved at 5-10% CR, which balanced strength, sustainability, and toughness. CRC thus holds promise for impact- and seismic-resistant applications.


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References


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