What is the main purpose of using fly ash as a supplementary cementitious materi

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Question: What is the main purpose of using fly ash as a supplementary cementitious material?

Options:

Correct Answer: To improve workability and durability

Solution:

Fly ash improves the workability and durability of concrete while also reducing the heat of hydration.

What is the main purpose of using fly ash as a supplementary cementitious material?

What is the main purpose of using fly ash as a supplementary cementitious material?

Correct Answer: Fly ash improves workability and durability of concrete.

Step 1: Understand what fly ash is - it is a byproduct from burning coal in power plants.
Step 2: Learn that fly ash can be added to concrete as a supplementary material.
Step 3: Know that one main purpose of using fly ash is to improve the workability of concrete, making it easier to mix and pour.
Step 4: Recognize that fly ash also helps increase the durability of concrete, making it last longer and resist damage.
Step 5: Understand that using fly ash can reduce the heat of hydration, which is the heat generated when cement reacts with water, helping to prevent cracks in large concrete structures.

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