Fly ash bricks are known for their exceptional strength and durability, outlasting many traditional building materials in the industry. In this article, we will explore the properties and advantages of fly ash bricks and blocks.
What is Fly Ash?
Fly ash is a by-product derived from modern thermal power plants, produced when a mixture of air and coal dust is combusted. This finely dispersed residue results from burning ground or powdered bituminous or sub-bituminous coals, such as lignite, and is carried away by the flue gases from pulverized coal or lignite-fired boilers.
Types of Fly Ash
Fly ash is typically classified into two categories: Class C and Class F. Class F fly ash contains particles coated in what resembles molten glass, which significantly reduces the risk of expansion due to sulfate exposure, often seen in fertilized soils or coastal regions. Class F usually has a low calcium content and can contain carbon levels of less than 5%, though sometimes up to 10%.
Class C fly ash, on the other hand, is also resistant to expansion from chemical attacks but has a higher percentage of calcium oxide than Class F. It is frequently used in structural concrete and generally contains less than 2% calcium in carbon fly ash.
Properties of Fly Ash Blocks and Bricks
Advantages of Fly Ash Blocks and Bricks
Bondada is dedicated to advancing green technology within the construction industry. We have perfected the art of producing bricks and manufacturing AAC blocks using 70-80% fly ash.