Abstract
Microfocus X-ray projection is presented as an accurate experimental technique for measuring moisture transport processes in porous materials. The technique has evolved from the better-known medical technique. Compared to classical ?-ray and NMR-techniques it allows an instant and accurate determination of the two-dimensional transient moisture content profiles. A calibration procedure is presented to optimise the resolution in moisture content by choosing an adequate sample thickness in relation to the energy of the X-ray source. To illustrate the capabilities of the X-ray projection method, examples of two-dimensional liquid water uptake in homogeneous, heterogeneous, micro- and macro-fractured materials are presented.
Original language | English |
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Pages (from-to) | 4762-4772 |
Number of pages | 11 |
Journal | International Journal of Heat and Mass Transfer |
Volume | 49 |
Issue number | 25-26 |
DOIs | |
Publication status | Published - 2006 |