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Construction Joint for massive Foundation Slab

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Can anyone give some advice on the appropriate time lapse prior to
casting a 2nd half pour of a massive foundation slab? Size 50m x 50m x
3m. Is it acceptable to cast the adjoining piece at the peak temperature
of hydration of the first slab provided adequate reinforcement is
provided to prevent thermal cracks. Personally I don't think the young
concrete is able give sufficient bond strength for making tthe rebars
effective to limit the crack width. What is the normal practice in Dam

KHO Poh Teck