Fly ash is a fine gray powder consisting mostly of spherical, glassy particles that are produced as a byproduct in coal-fired power stations. Fly ash has pozzolanic properties, meaning that it reacts with lime to form cementitious compounds. It is commonly known as a supplementary cementitious material.
Fly ash is suitable for a wide variety of applications and uses, including:
â?¢ Concrete
â?¢ Dams
â?¢ Flowable fill
â?¢ Mines
â?¢ Landfills
â?¢ Geopolymer concrete
Fly ash is also known as flue-ash or simply ash.
Fly ash significantly improves concrete performance and also provides many benefits in cement and non-cement applications. Also, when treated with sodium hydroxide, fly ash appears to function well as a catalyst for converting polyethylene into a substance similar to crude oil in a high-temperature process called pyrolysis.