What are the advantages and disadvantages of using Fly ash in Concrete?

Fly Ash

Coal

Fly Ash is a by-product or residue that is formed after the combustion of coal. Fly Ash is widely used in concrete nowadays;

However, the advantages and disadvantages of using fly ash in concrete are

Advantages of Fly Ash

• It is highly economical.
• The use of Fly Ash is environmentally friendly as the waste materials from industries are effectively being used to create quality building materials.
• Fly Ash has very small particles which make the concrete highly dense and reduce its permeability of concrete. It can add greater strength to the building.
• The concrete mixture generates a very low heat of hydration which prevents thermal cracking.
• Fly Ash concrete is resistant to acid and sulfate attacks.
• The shrinkage of fly ash concrete is very less.
• The use of fly ash gives concrete good workability, durability and finish.

Read also : Difference between Clay Bricks vs. Fly Ash Bricks

Disadvantages of Fly Ash

• The quality of fly ash can affect the quality and strength of Cement concrete.
• Poor-quality fly ash can increase the permeability of the concrete and cause damage to the building.

Hence the advantages of using fly ash in concrete are more than the disadvantages.

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