Fly Ash is a fine powder that is a byproduct of burning coal in electric power plants. It is collected from the flue gases and consists mainly of silica, alumina, and iron. Fly ash is commonly used in construction materials, particularly in concrete, where it enhances strength and durability while reducing the amount of cement needed. In addition to its use in construction, fly ash can also be utilized in geotechnical engineering and as a lightweight fill material. Its incorporation into various applications helps to reduce waste and promote sustainability by recycling industrial byproducts.