What is the main function of fly ash when used as a cement replacement?

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Question: What is the main function of fly ash when used as a cement replacement?

Options:

Correct Answer: To improve workability and reduce permeability

Solution:

Fly ash improves workability and reduces permeability when used as a cement replacement.

What is the main function of fly ash when used as a cement replacement?

What is the main function of fly ash when used as a cement replacement?

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 used as a replacement for cement in concrete.
Step 3: Know that when fly ash is added to concrete, it helps make the mixture easier to work with. This is called 'improving workability.'
Step 4: Recognize that fly ash also helps reduce the amount of water that can seep through the concrete. This is known as 'reducing permeability.'
Step 5: Conclude that the main function of fly ash in concrete is to enhance its properties, making it stronger and more durable.

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