Practice Environmental Conditions (17.2.1) - Design of Concrete Mix for Pavements

Practice: Environmental Conditions

Lesson 17.2.1Design of Concrete Mix for Pavements

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9 questions

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6 sample questions

Question 1.
What is freeze-thaw exposure?
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Think about how temperature changes affect water.
Question 2.
Name one way to prevent damage from freeze-thaw cycles.
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Consider materials added to concrete mix.
3Question 3.
What does freeze-thaw exposure refer to?
- Cycles of wet and dry weather
- Cycles of freezing and thawing of water within concrete
- High temperature conditions
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Think about how water behaves when it freezes.
4Question 4.
Can sulfate presence cause expansion in concrete?
- True
- False
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Recall the impact of chemical reactions on materials.
Question 5.
Design a concrete mix for a pavement expected to endure severe freeze-thaw cycles based on your understanding of air-entraining agents and other additives.
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Consider what materials would aid in freeze-thaw resistance.
Question 6.
Evaluate how different sulfate levels might affect the mix design for concrete in a contaminated region. Discuss the implications of using regular versus sulfate-resistant cement.
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Think about the chemistry behind cement interactions with sulfates.

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