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Laitance on a freshly hardened concrete surface is best defined as:

AA thin layer of cement slurry mixed with fine silt/dust rising to the surface due to excess water
BEfflorescence caused by sulphate attack
CAir pockets formed by improper vibration
DSurface scaling caused by frost action

Explanation

Laitance is a weak, non-durable layer of cement and fine particles brought to the concrete surface by bleeding water, which must be removed before placing new concrete.

Submitted by: mcqstutor Team More Civil Engineering MCQs →

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