Leverage of high-volume fly ash along with glass fiber for sustainable concrete

The production of fly ash is mounting steadily every year all over the globe, but the rate of recovery is insufficient compared to its production. The disposal of fly ash is becoming more and more difficult in India. Reusing fly ash for some valuable uses is one of the most convenient solutions to this problem. As a result, the present study has focused on the use of high volume fine grain fly ash as a partial alternative material for cement and sand with a low volume fraction of glass fiber. Glass fiber reinforced concrete mixtures consisting of up to 40% replacement of cement and sand by fly ash were produced for making sustainable concrete. The experimental work was carried out by preparing diverse mixes with a 0.40 water-cement ratio and analyzing the fresh as well as hardened properties of mixes. The experimental results reveal that the separate and combined replacement of cement and sand by fly ash together with glass fiber, enhance the durability and strength of concrete. When combining 20% of cement and 40% of sand replaced by fly ash together with glass fiber, better result was observed than all other mixes. The compressive strength, electrical resistivity (ER), and ultrasonic pulse velocity (UPV) increased by 36.33%, 65.82%, and 7.25% over control mix (C0-0). This discovery is very useful for making dense, durable and sustainable concrete by using proposed mixes.