FLY ASH

Fly ash concrete has increased strength and durability, which means it can handle greater loads, is more resilient and lasts longer. Fly ash concrete can withstand harsher service environments than straight portland cement concrete. It is less susceptible to chemical attacks (de-icing salts, soil sulfates, etc.) and mitigates the negative impact of deleterious aggregates. This is especially true when using fly ash in infrastructure projects, such as roads, highways and bridges.

Fly ash concrete is easier to work with because of its spherical shape and its ability to moderate early concrete set time. The improved flowability, reduced hydration temperatures and delayed setting time of fly ash concrete are the main factors that contribute to ease of placement of concrete. Fly ash concrete also has lower permeability than traditional concrete, which means less water and chemicals can enter the concrete. Therefore, fly ash concrete has a longer service life and doesn’t need to be repaired or replaced as often. Some states require the use of fly ash concrete to prevent premature deterioration. Fly ash is used to mitigate a problem called alkali silica reaction, which occurs when concrete deteriorates early due to issues with aggregate quality. This is a major issue for some states, and fly ash is the product most widely-used to combat this problem. Tradeworth International is the biggest fly ash supplier in Pakistan.