What is the main function of using fly ash as an admixture in concrete?

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Question: What is the main function of using fly ash as an admixture in concrete?

Options:

Correct Answer: To enhance workability and reduce permeability

Solution:

Fly ash is used as an admixture to enhance workability, reduce permeability, and improve the long-term strength of concrete.

What is the main function of using fly ash as an admixture in concrete?

What is the main function of using fly ash as an admixture in concrete?

Correct Answer: Fly ash is used to enhance workability, reduce permeability, and improve long-term strength of concrete.

Step 1: Understand what fly ash is. Fly ash is a byproduct from burning coal in power plants.
Step 2: Learn that fly ash can be added to concrete as an admixture, which means it is mixed in with the concrete ingredients.
Step 3: Know that one main function of fly ash is to enhance workability, making the concrete easier to mix and pour.
Step 4: Recognize that fly ash helps reduce permeability, which means it makes the concrete less likely to absorb water and other substances.
Step 5: Understand that using fly ash can improve the long-term strength of concrete, making it stronger over time.

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