Practice Segregation And Bleeding In Fresh Concrete (9) - Mixing of Concrete

Practice: Segregation and Bleeding in Fresh Concrete

Lesson 9Mixing of Concrete

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9 questions

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2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is segregation in concrete?
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Think about how components might separate when mixed improperly.
Question 2.
Name one cause of bleeding.
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Consider the behavior of heavy solids in a liquid.
3Question 3.
What is segregation in fresh concrete?
- Separation of aggregates
- Increase in water content
- Formation of laitance
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Think of the outcome of a poorly mixed batch.
4Question 4.
Bleeding occurs when water moves upwards in fresh concrete due to:
- True
- False
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This is a direct result of weight differences among concrete components.
Question 5.
You are designing a concrete mix for a high-rise building. Describe how you would address potential problems of segregation and bleeding during the mixing and placement phases.
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Think about the design considerations necessary for structural integrity.
Question 6.
Evaluate a scenario where excessive bleeding observed in a concrete pour leads to surface failure. Describe potential rectifications that could be implemented in future pours.
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Consider how material selection impacts the characteristics of fresh concrete.

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