Beam bending is an excellent method for measuring low permeabilities (≤10-18 m2) in homogeneous materials, because it is fast, requires no high pressure, and provides a concurrent measurement of the modulus of the material. The method was previously analyzed and substantiated for cylindrical or square beams. Recently, the analysis was extended to include isotropic and transversely isotropic rectangular beams. In this paper, the analysis is applied to measurements performed on cement paste, and it is shown that the solution for isotropic rectangular beams accounts for changes in the hydrodynamic behavior caused by changing the aspect ratio of the sample. The permeability and elastic modulus results are verified through comparison to previous measurements on cylindrical beams.
|Number of pages
|Journal of the American Ceramic Society
|Published - Oct 2004
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry