EXPERIMENTAL STUDY ON THE DURABILITY CHARACTERISTICS OF RUBBERIZED CONCRETE UNDER AGGRESSIVE CHEMICAL EXPOSURE

Abstract

The deterioration of concrete structures caused by acids, sulphates, and chlorides has become a major concern in modern construction, particularly in industrial and coastal environments. At the same time, the disposal of waste automobile tyres poses serious environmental challenges due to their non-biodegradable nature. This study examines the durability performance of Tyre Rubber Aggregate Concrete (TRAC) produced by partially replacing conventional aggregates with recycled tyre rubber particles. Concrete specimens of M20 and M25 grades containing fine rubber, coarse rubber, and combined rubber aggregates were exposed to hydrochloric acid (HCl), sulphuric acid (H₂SO₄), magnesium sulphate (MgSO₄), and sodium chloride (NaCl) solutions. The durability behavior was evaluated through weight variation measurements and visual inspection of surface deterioration. Experimental observations revealed that rubberized concrete exhibited lower weight loss under acidic conditions and reduced ion absorption under sulphate and chloride exposure compared to ordinary concrete. Mixes containing fine rubber aggregates showed the best resistance due to the hydrophobic and flexible nature of rubber particles, which minimized permeability and restricted chemical penetration. The results indicate that Tyre Rubber Aggregate Concrete possesses enhanced durability and reduced surface damage in aggressive environments. In addition to improving concrete performance, the use of waste tyre rubber promotes sustainable construction and effective waste management practices. The study demonstrates that TRAC can serve as a durable and eco-friendly alternative material for structures exposed to harsh environmental conditions.