Maximum time for concreting successive lifts is required for concrete structures to reduce the potential differential strains. However, minimum time is needed to allow for possible shrinkage and thermal contraction to take place in the event of alternative bay construction before concreting to alternate bays. Otherwise, cracking may result which is undesirable in water retaining structure.
This question is taken from book named – A Self Learning Manual – Mastering Different Fields of Civil Engineering Works (VC-Q-A-Method) by Vincent T. H. CHU.
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