Effect of Immersion Time on the Mechanical Properties of Glass Fibre Reinforced Concrete with Glass Powder Immersed in Water

Production of cement causes environmental problems like global warming due to the release of carbon dioxide. Usage of cement can be reduced by partially replacing cement in concrete with a suitable material. This paper studies the effect of water immersed glass powder and glass fibre mechanical properties of concrete. Cement is partially replaced with 10, 15 and 20% of glass powder by weight of cement immersed in water at 1.5, 3, 4.5 and 6 h. Glass powder is added to the water required for the mix before adding it to the cement and aggregates. Then 0.25, 0.5, 0.75 and 1% glass fibre by weight of cement is incorporated in to the concrete containing optimum percentage of glass powder with optimum immersion time. Glass fibre having length of 6 mm and diameter 14 µm is used. Calcium and sodium ions are dissolved in presence of water from glass powder (Abo-Hasseira et al. in Constr Build Mater 206:674–682, 2019 [1]; Elaqra et al. in Constr Build Mater 203:75–82, 2019 [5]). Concentration of sodium ions decreases with immersion time as it bonds with silicon dioxide on the surface of glass powder particles (Abo-Hasseira et al. in Constr Build Mater 206:674–682, 2019 [1]). This paper discusses compressive strength, flexural strength and split tensile strength of concrete. Higher strength is obtained due to the packing filling effect of glass powder and pozzolanic reaction due to the free ions in water before mixing with the concrete.