Abstract
This paper deals with the problem of cracking due to the thermal shock of concrete. Safe temperature differentials between concrete and air are given with sample calculations in arriving at the values. The required amount of insulation is shown for various weather conditions to cure the concrete in accordance with the CSA specification. Assuming that the stipulated insulation is attached to the formwork, the safe stripping times to avoid thermal cracks are given for various thicknesses of structures under various degrees of restraint. The salient points are illustrated with practical examples, and the vital data are presented in graphical form to make it usable.
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