Title:
Controlling Early-Age Cracking in Mass Concrete
Author(s):
Kozikowski, R.L., and Suprenant, B.A.
Publication:
Concrete International
Volume:
37
Issue:
3
Appears on pages(s):
59-62
Keywords:
temperature, crack, width, steel
DOI:
10.14359/51687731
Date:
3/1/2015
Abstract:
Mass concrete placements are conducted using thermal control plans that provide limits on maximum concrete temperature as well as maximum temperature differential. While the maximum temperature is limited to avoid damage due to delayed ettringite formation, temperature differential is limited to avoid or minimize cracking due to internal restraint. In the latter case, strategies generally include insulating placed concrete. This article summarizes existing guidelines that allow near-surface reinforcing steel to be included in strategies for minimizing thermal cracking. Construction teams are cautioned that reinforcement will not eliminate requirements to limit maximum temperature or to consider the effects of maximum temperature differential on cracking. Cost analyses and consultation with the owner are recommended.
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