Dynamic Pressurization

    This technique was invented by Joachim Gross when he was a post-doctoral researcher at Princeton. It was first applied to measure the permeability of aerogels, and then extended to apply to concrete. This method suffers from the same problem as thermopermeametry: the air bubbles in concrete interfere with the measurement, so the sample has to be carefully prepared to avoid entrapping air. When air is avoiding, the experiments by Zach Grasley (Univ. Illinois, Champain-Urbana) show that the method works well, and gives results comparable to those found by beam-bending.

Relevant papers:

“Dynamic Pressurization: Novel method for measuring fluid permeability”, J. Gross and G.W. Scherer, J. Non-Cryst. Solids 325 (2003) 34-47

“Dynamic Pressurization Method for Measuring Permeability and Modulus: I. Theory”, G.W. Scherer, Materials and Structures, 3 (2006) 1041–1057

“Dynamic Pressurization Method for Measuring Permeability and Modulus: II. Cementitious materials”, Z.C. Grasley, G.W. Scherer, D.A. Lange, and J.J. Valenza II, Materials and Structures, 40 [7] (2007) 711-721

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