If there is any obstruction to the uniform settlement of hardened concrete, it forms a crack known as-
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A.
Settlement crack
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B.
Longitudinal crac
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C.
Shear crack
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D.
Random crack
Correct Answer:
A. Settlement crack
Explanation:
A settlement crack occurs when there is an obstruction to the uniform subsiding of concrete while it is still in its plastic state or during the hardening process. This typically happens over reinforcement bars, near formwork ties, or due to changes in the depth of the section, where the concrete is prevented from settling at the same rate as the surrounding material. While other cracks like shear or longitudinal cracks result from structural loading or shrinkage, settlement cracks are specifically defined by this interference with the natural downward movement of the fresh concrete mix.
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