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Earlier findings showed that the effects of moisture (liquid or free water) in hardened concrete on its behavior, especially the lesser known effects ofuneven moisture distribution, can (a) be significant, and (b) vary from property to property. This distribution, for instance whether or not the surface layer is drier than the overall average moisture content, can be characterized by the difference...
The results presented in this communication show that the conventional configuration adopting a shear vertical wave at 45° of incidence to detect cracks breaking the surface opposite the one on which the inspecting transducer is placed is not optimal when the crack depth is of the order of one wavelength of the inspecting wave or smaller. Angles of incidence proximal to the critical angle of longitudinal...
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