Fly ash gypsum powder is a, often white, specialized construction ingredient (96-98% purity) primarily used as a binder and strength enhancer in fly ash bricks and AAC blocks. It acts as a curing agent that improves early strength, durability, and workability, while reducing lime leachability in, for example, this product description from ecoawas.com.
Key Characteristics and Uses:
Purpose: Acts as a binder and accelerator for curing in fly ash bricks, improving structural strength, water resistance, and durability.