Chemical Durability of Concrete Containing Pyrolyzed Waste Tyre Wires: A Mechanical and Microstructural Investigation

Abstract- The depletion of natural resources and need for advancements in industrial waste management have motivated researchers to focus on identifying innovative strategies to lower carbon emissions within the construction industry. Concrete’s inherent brittleness limits its ductility. To enhance this property, researchers have explored the incorporation of fibres in concrete. This research evaluates the durability of concrete containing Pyrolyzed Waste Tyre Wires (PWTW) under chemical erosion. Specimens with PWTW dosages of 0%, 0.5%, 1%, and 1.5% by weight were prepared and exposed to H₂SO₄ and MgSO₄ solutions for up to 56 days. Compressive strength evolution and microstructural changes (SEM) were assessed. After 56 days, PWTW inclusion significantly mitigated strength loss due to chemical attack. Compared to the control (0% PWTW), the 1% PWTW mix showed the lowest strength loss in H₂SO₄ (11.65% vs 15.93%), while the 1.5% PWTW mix performed best in MgSO₄ (20.9% vs 28.88% loss). SEM analysis revealed denser microstructures in PWTW-reinforced samples after chemical exposure. Findings demonstrate that PWTW enhances concrete's resistance to sulfuric acid and magnesium sulphate attack, supporting their use in durable and sustainable construction.

End of Life Tyres, Concrete, Durability, Environment, Acid Attack, Sulphate Attack

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