Integrated experimental-modeling study on strength and durability in fiber-reinforced geopolymer concrete

Abstract

The newest innovation in the building industry is alkaline activated concrete. Additionally, the demand for river sand has increased significantly and is now more expensive. Utilizing locally accessible supplies improves both the environmental and economic aspects. Manufactured sand (MS) is a substitute for stream sand in this situation. Using the right reinforcing components, namely “Fibers,” can increase the ductility of these quasi-brittle inorganic composites. The paper's focus is polymer–concrete optimization, highlighting the impact of fiber and molar concentration. To make GPC mixtures, a solution-to-binder ratio of 0.45 was maintained. An addition of 1% of fibers was made to the matrix. The samples were considered for molarities of 12 and 14. Samples were cast and exposed to ambient curing. In addition to fibers with increasing molarities, the slump values have decreased by 41%, compressive and flexural strength results are improved by 11% and 19% respectively, and the modulus of elasticity (Ec) is compared with the analytical equation where the coefficient is within 10%. Sorptivity outcomes prove a noteworthy decline in capillary rise up to 24.7% compared to traditional concrete; penetration of chloride has reduced by 39%.