Practice Field Practices To Minimize Defects In Fresh Concrete (5) - Segregation

Practice: Field Practices to Minimize Defects in Fresh Concrete

Lesson 5Segregation

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10 questions

Flashcard drill
4 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
4 questions · about 3 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 what happens to the aggregates in a non-uniform mix.
Question 2.
Name one method to prevent segregation during transport.
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Consider how you would transport a mix without shaking it.
3Question 3.
What is the main concern with segregation?
- It creates a uniform mix
- It leads to a non-uniform structure
- It improves strength
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Consider the consequences of poor mixing.
4Question 4.
True or False: Slump loss is a sign that concrete is becoming more workable.
- True
- False
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Think about what happens to a mix as it sits.
Question 5.
You are overseeing a concrete pouring project and notice slab stiffness starting to occur after 25 minutes. What steps should you take to ensure quality?
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Think about what options are available for improving mix characteristics post-mixing.
Question 6.
During transportation, segregation was observed in a concrete mix. Analyze the possible causes and suggest effective measures to prevent this in future projects.
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Reflect on the impact of vibration and dropping heights in concrete handling.

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