Effect of AR-glass fibers and natural micronized zeolite on mechanical and permeability properties of concrete exposed to normal, sodium chloride, and magnesium sulfate environments

This article investigates the effects of AR glass fibers and micronized natural zeolite on reducing permeability and increasing compressive strength. However, there is little detailed information about the impact of the interaction of zeolite and AR glass fibers on the mechanical properties and their comparison in normal environments with Chloride (NaCl) and sulfate (MgSO4). According to the results of the tests, the compressive strength of mixture 9 (1 % by volume of concrete, glass fibers, and 12 % by weight of cement, zeolite) and mixture 11 (2 % by volume of concrete, glass fibers, and 8 % by weight of cement, zeolite) in normal environments, Chloride and sulfate increased by 43.2, 34.8, and 30.1, 64.1, 68, and 58.8 %, respectively, compared to the control sample of its environment. The permeability of mixtures 9 and 11 has decreased by 68.42, 66.67, 42.31, 47.37, 61.9, and 55.77 %, respectively, compared to the control sample of its environment. Finally, SEM images have been used to investigate the microscopic structure.