Determination of the unsaturated hydraulic diffusivity of porous construction materials from transient moisture profiles utilizing pin-type resistance sensor array

Q. G. Wang*, K. Ahmet, Y. Yue, L. Y. L

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


A method for determining the unsaturated hydraulic diffusivity of porous building materials using pin-type resistance sensor array was discussed. The transient moisture profiles and associated master curves were obtained using a 20 channel real-time automatic computer monitoring system. The cuboid samples of gypsum, plaster of paris and multifinish plaster with predetermined water/plaster ratio and effective porosity were analyzed by embedding 20 pairs of pin-type stainless steel electrodes along them. The moisture profiles were obtained by scanning the resistances across electrode-pairs. The results indicates the dependence of diffusivity on moisture content.

Original languageEnglish
Pages (from-to)1013-1015
Number of pages3
JournalJournal of Materials Science
Issue number4
Publication statusPublished - Feb 2005
Externally publishedYes

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