Fly ash and Micro silica

Fly ash and micro silica are both industrial byproducts commonly used in construction, particularly in concrete and cement applications, to enhance performance and durability. Here’s a brief overview of each:

Fly Ash

• Source: A byproduct of coal combustion in thermal power plants.
• Composition: Rich in silica, alumina, and iron oxides.
• Types
• Class F: Produced from burning anthracite or bituminous coal, with pozzolanic properties.
• Class C: Derived from sub-bituminous coal, has both pozzolanic and cementitious properties.

Micro Silica (Silica Fume)

Source: A byproduct of silicon and ferrosilicon alloy production in electric arc furnaces.
Composition: Extremely fine particles (100 times smaller than cement particles) with high silica content (85-98%).