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

Practice Questions

Q1
What is the main function of fly ash when used as a cement replacement?
  1. To increase the density of concrete
  2. To improve workability and reduce permeability
  3. To enhance the color of concrete
  4. To decrease the setting time

Questions & Step-by-Step Solutions

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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