What is the main purpose of using fly ash as a supplementary cementitious materi
Practice Questions
Q1
What is the main purpose of using fly ash as a supplementary cementitious material?
To increase the weight of concrete
To improve workability and durability
To reduce the cost of concrete
To enhance color
Questions & Step-by-Step Solutions
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.
