Practice Shrinkage Cracking: Mechanism And Risk Areas (4.5) - Failure Mechanism in Hardened Concrete

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6 sample questions

Question 1.
Define shrinkage in the context of concrete.
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Think about how drying affects concrete.
Question 2.
What is restraint in relation to concrete shrinkage?
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Consider external and internal forces.
3Question 3.
What causes shrinkage cracks in concrete?
- Moisture gain
- Moisture loss
- Chemical reaction
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Think about what happens when concrete dries.
4Question 4.
T/F: All cracks in concrete are due to shrinkage.
- True
- False
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Consider other failure mechanisms.
Question 5.
A contractor is building a long retaining wall. Describe two potential risks of shrinkage cracking and suggest a mitigation strategy for each.
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Think about environmental effects and preventive measures.
Question 6.
Analyze the impact of a high water-cement ratio on shrinkage cracking risk in a concrete slab.
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What happens when there's more water compared to cement?

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