Abstract
We revisit the approach to the drying shrinkage of cement-based materials using Poromechanics of unsaturated materials. It is in particular shown that the equivalent pore pressure concept, by opposition to the averaged pore pressure, can account for the surface energy effect upon the drying shrinkage. Experimental evidence shows that the influence of the latter reveals to be essential for intermediary values of the relative humidity since the contribution of the interfacial energy significantly increases as the relative humidity is reduced.
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