In the world of concrete technology, glass fibre reinforced concrete is a relatively new discovery. Concrete, as the most significant and commonly used material, is required to have extremely high strength as well as appropriate workability. More desirable features of concrete include high compressive strength, stiffness, and durability. Concrete is brittle and weak in tension at the same time. The technology was dubbed glass-fiber reinforced concrete because it uses alkali-resistant glass fibre to increase the concrete qualities. The glass fibre was utilised in the first stage of the experimental inquiry to investigate the influence on compressive strength on M20, M25, and M20 grade concrete for various percents of glass fibre, i.e., 0%, 3%, 5%, and 7% by weight of aggregates. And, in today's world, sustainable and green development are the key priorities. Thermal power plants currently produce a significant amount of fly ash as a waste product, which is bad for both the environment and people. Since fly ash is hard to decompose, it's a big step towards long-term sustainability. Moreover, one of the biggest polluters is the cement industry due to its carbon dioxide emissions.