Abstract
Existing design approaches for crack control are generally based on short-term tests and do not adequately account for the time-dependent increase in crack widths caused primarily by concrete shrinkage. In this paper, several of the currently used design approaches for flexural crack control are evaluated using the results of an experimental study of flexural cracking in reinforced concrete beams and slabs, and the weaknesses of the existing design approaches are exposed. A reliable and rational method for use in design is proposed and illustrated by example.
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