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"Fly ash" is the name given to the waste product that coal-fired power plants manufacture. Worldwide, a tremendous amount of fly ash is produced and used for various reasons. Because it is not toxic, fly ash is sometimes referred to as an environmentally beneficial material. It is most often utilised in cement. When compared to other matrix or composite materials, FA's low density allows for weight reduction without sacrificing mechanical qualities, making it an attractive material choice. The transportation industry's applications benefit from this since it lowers their life cycle cost. FA is one example of a waste product that may be obtained at no cost. Reinforcing composite materials using FA lowers their overall cost. The primary mineral components of FA materials are AL oxide, calcium oxide, and silicon dioxide. By increasing the amount of FA in the cement, they may likewise be used as a building block in concrete. In addition to their use in geopolymers, they find utility in composites. The use of thermal spray is being given increased attention. Thermal spray prevents component wear and corrosion. Among the materials with physical qualities that may be used to create materials with excellent mechanical properties is FA. Permanent changes to soil physical and chemical qualities are possible with the right FA design. Even if it contains FA, embankment is still done so that collateral harm is minimised. Our goal is to learn more about fly ash's potential use as a composite material via this. [ABSTRACT FROM AUTHOR]