Practice Silica Fume (microsilica) (6.3) - Mineral Admixtures

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6 sample questions

Question 1.
What is the main component of silica fume?
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It's more than 90% of its composition.
Question 2.
What is the typical particle size of silica fume?
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It's extremely fine.
3Question 3.
What is the primary chemical make-up of silica fume?
- Less than 50% SiO₂
- Over 90% SiO₂
- Around 30% SiO₂
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Look for the material with the highest SiO₂ content.
4Question 4.
Silica fume primarily enhances which property of concrete?
- Permeability
- Flexural Strength
- Color
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Think about structural performances.
Question 5.
Analyze the effects of incorporating 15% silica fume by weight into a standard concrete mix. What are the anticipated benefits and potential challenges?
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Consider both the performance improvements and workability adjustments.
Question 6.
Research the environmental impact of using silica fume in concrete compared to traditional Portland cement. Discuss the benefits and drawbacks.
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Think about both the lifecycle and logistics of silica fume versus cement.

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