Strength and Durability Evaluation of Multi-Binder Geopolymer Concrete in Ambient Condition

Abstract

In recent decades, researchers have been fascinated with geopolymer concrete because of its minimal carbon footprint. Geopolymer concrete (GPC) has been found a viable alternative for recycling industrial waste. The efficient use of these wastes in geopolymer concrete reduces environmental pollution. In the study, three industrial wastes were utilized for making geopolymer concrete at ambient temperature. These wastes are fly ash, ground granulated blast furnace slag (GGBS), and two different ceramic polishing waste (CPW). The study proposes fly ash as the primary binder. GGBS is projected as the additive for ambient curing, and CPWs as a recycling binder. The alkali activators Na2SiO3 and NaOH were used to manufacture the concrete mixture consisting of three binders. Important GPC factors such as workability, mechanical strength, sorptivity, water absorption, acid resistance, and chloride resistance have been examined. Further Carbon footprint is also measured to know the environmental impact. The findings revealed an improvement in capillary porosity and chloride permeability with the increase of CPWs upto 20%. The SEM images revealed improvement in microstructure with an increase in CPWs upto 20%. The use of CPWs also reduced the Carbon footprint of GPC. The study determined that the mechanical, durability and environmental qualities of multi-binder GPC make it suitable for structural concrete.