Practice Bleeding (2.2) - Workability of Fresh Concrete

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10 questions

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6 questions · about 4 min · pass mark 70%. Hints available.
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4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is bleeding in concrete?
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Think about how water behaves in a solid matrix.
Question 2.
What is laitance?
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What's the condition of the surface when water rises?
3Question 3.
What is a major effect of bleeding in concrete?
- Increased viscosity
- Weaker surface layer
- Lower workability
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Think about how the surface interaction impacts strength.
4Question 4.
True or False: Increasing the water content always improves the workability of concrete.
- True
- False
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Balance is key in concrete mix design.
Question 5.
Consider a construction project where bleeding was a significant issue. What steps would you recommend to mitigate its effects in future projects?
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Focus on the relationship between material composition and concrete behavior.
Question 6.
Analyze a scenario where excessive bleeding led to structural failure after a few years. What underlying mix design flaws might have contributed to this issue?
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Think about the entire concrete placing process.

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