Influence of chloride and sulfate solution on the long‐term durability of modified rubberized concrete

Abstract

AbstractLimited investigations are available on the influence of chloride and sulfate solutions on pozzolana‐based cement rubberized concrete after crumb rubber treatment. Mechanical and durability characteristics of rubberized concrete are assessed and compared to conventional concrete. Five contents of crumb rubber (10%–30% at 5% of increment) are utilized for partially replacing fine aggregate in concrete. The optimum amount of crumb rubber in concrete is revealed at a replacement level of 15%. The specimens remained in the crystalline form after being immersed in NaCl (sodium chloride), Na2SO4 (sodium sulfate), and MgSO4 (magnesium sulfate) solution, according to structural analyses by XRD (X‐ray diffraction). When rubberized concrete is submerged in both sulfate solutions with the same concentrations and for the same amount of time, the specimens immersed in Na2SO4 solution lose less weight and compressive strength than specimens submerged in MgSO4 solution. The losses in compressive strength of conventional concrete are 1.86%, 3.57%, and 4.82% when immersed in NaCl, Na2SO4, and MgSO4 solution. However, the losses are 1.67%, 2.79%, and 3.16% in rubberized concrete only at 24 weeks. Pozzolana‐based cement and after crumb rubber treatment, the rubberized concrete can resist chloride and sulfate solutions for a long duration.