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Tuesday, June 14, 2005

The Problem So Far...

Naturally, the first question is, "Why try to model restrained shrinkage of concrete?" It is a well established fact that concrete shrinks and because of restraint subsequently cracks. Concrete design codes have addressed control of shrinkage cracks since the 1920s. Current code design provisions are essentially unchanged since the 1940s. However, the codes in their present state are:

1) Entirely based upon empirical observation
2) Address only the case of unrestrained shrinkage
3) Do not give specific guidance concerning the restrained shrinkage case

Thus the goal of my work has been to develop design recommendations based upon my experimental and analytical work.

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