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What is the primary purpose of adding fly ash to a concrete mix design?

Correct Answer

B) To reduce the heat of hydration and improve long-term durability

Fly ash is a pozzolanic material that reduces heat of hydration, improves long-term strength development, and enhances durability by reducing permeability.

Answer Options
A
To accelerate the curing process in cold weather
B
To reduce the heat of hydration and improve long-term durability
C
To increase the concrete's compressive strength immediately
D
To increase the concrete's workability without adding water

Why This Is the Correct Answer

Fly ash is a pozzolanic material that reduces heat of hydration, improves long-term strength development, and enhances durability by reducing permeability.

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