Fly ash Fly ash is a finely divided mineral material that can partially replace Portland cement in certain concrete mixes. It is commonly used to improve workability and long-term durability.
When incorporated into concrete, fly ash can reduce heat generated during curing and improve resistance to certain forms of chemical deterioration. It may also enhance the concrete's long-term strength under appropriate conditions. The suitability of fly ash depends on the project's approved mix design and performance requirements.
Frequently Asked Questions About Fly ash
What is fly ash in concrete?
A finely divided mineral material that can partially replace Portland cement in a mix.
What are its benefits?
It can improve workability, reduce the heat generated during curing, improve resistance to certain chemical attack, and contribute to long-term strength.
Are there drawbacks?
Mixes with fly ash can gain early strength more slowly, which matters in cold weather or on tight schedules.
Is fly ash always allowed?
No. Its use depends on the approved mix design and the project's performance requirements.