Concrete curing: which of the following are benefits of curing concrete after placement?
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Areduces the shrinkage of concrete
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Bpreserves the properties of concrete
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Cprevents the loss of water by evaporation
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Dall of the above
Answer
Correct Answer: all of the above
Explanation
Introduction / Context:Curing is the process of maintaining suitable moisture and temperature in concrete after it is placed. Proper curing is critical for hydration and achieving design strength and durability.
Given Data / Assumptions:
- Concrete placed and compacted properly.
- Curing carried out by ponding, sprinkling, membranes, or curing compounds.
Concept / Approach:Curing reduces shrinkage by slowing evaporation, ensures full hydration, and maintains temperature. This preserves long-term properties and prevents cracks due to plastic shrinkage.
Step-by-Step Solution:(a) Shrinkage reduction: by controlling evaporation.(b) Preserves properties: ensures full hydration and strength development.(c) Prevents water loss: protects surface and internal hydration.Therefore, all of the above are correct.
Verification / Alternative check:Codes (IS 456, ACI 308) highlight curing benefits including strength, durability, shrinkage reduction.
Why Other Options Are Wrong:
- Each listed benefit is correct; excluding any would understate curing's role.
Common Pitfalls:
- Assuming curing is only for surface; hydration continues deep inside concrete.
Final Answer:all of the above