Practice Bleeding (9.2) - Mixing of Concrete - Civil Engineering Materials, Testing & Evaluation

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9 questions

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6 sample questions

Question 1.
What is bleeding in concrete?
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Think about what happens to water in a liquid concrete mix.
Question 2.
How can bleeding affect the surface of concrete?
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Consider what occurs at the top layer of hardening concrete.
3Question 3.
What is the main cause of bleeding in fresh concrete?
- Low water-cement ratio
- Upward movement of water
- Improper mixing
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Remember the definition of bleeding.
4Question 4.
True or False: Laitance forms due to excess bleeding in fresh concrete.
- True
- False
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What happens when water rises to the surface?
Question 5.
You are tasked with creating a concrete mix for a hot weather project. Explain how you would adjust the mix to prevent bleeding issues.
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Think about materials that can help in hot temperatures.
Question 6.
During an inspection, you notice significant bleeding in a fresh concrete batch. What steps would you take to assess and rectify the situation?
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Focus on factors that contribute to mixing quality and component selection.

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