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What is the effect of adding silica fume to concrete?

Practice Questions

Q1
What is the effect of adding silica fume to concrete?
  1. Increases permeability
  2. Reduces strength
  3. Improves durability and strength
  4. Decreases workability

Questions & Step-by-Step Solutions

What is the effect of adding silica fume to concrete?
  • Step 1: Understand that silica fume is a byproduct from making silicon or silicon alloys.
  • Step 2: Know that when added to concrete, silica fume acts like a fine powder.
  • Step 3: Realize that this fine powder fills tiny spaces (voids) in the concrete mix.
  • Step 4: Learn that filling these voids makes the concrete denser and stronger.
  • Step 5: Understand that silica fume also helps particles in the concrete stick together better.
  • Step 6: Conclude that because of these effects, concrete with silica fume is more durable and has higher strength.
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