Wet Ash: Wet ash is a fine byproduct material formed in coal-fired plants and transported mixed with water. It is used as an additive in concrete and filling applications. It increases strength.

Bottom Ash: Bottom ash is a coarse-grained ash that accumulates at the bottom of boilers as a result of coal combustion in thermal power plants. Its lightweight and durable structure makes it suitable for filling, road sub-base, and concrete applications.

Fly ash is the fine-grained ash that comes out of the chimney during the combustion of coal. It is used as a mineral additive in cement and concrete mixtures. It increases compressive strength and workability.