7.4.4 - Select Proportions of SCMs
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Practice Questions
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What is silica fume used for in HPC?
💡 Hint: Think of its role in improving concrete density.
Name one SCM that improves workability.
💡 Hint: It's a byproduct from burning coal.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the recommended percentage of silica fume in HPC?
💡 Hint: It's a small percentage but very powerful in effect.
True or False: Fly ash can only be used in low-strength concrete.
💡 Hint: Think about its benefits across different concrete strengths.
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Challenge Problems
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Design a High Performance Concrete mix incorporating 10% silica fume, 20% fly ash, and 30% GGBS. Calculate the total binder content if the total weight of concrete is 800 kg.
💡 Hint: Determine the percentages relative to the total weight.
Discuss the effects on workability and strength if silica fume is increased to 15% in an HPC mix. What adjustments might you make?
💡 Hint: Consider how material interactions can change.
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