Characterisation of pore structure by combining mercury porosimetry and micrography

S. Roels, J. Elsen, J. Carmeliet, H. Hens

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43 Citations (Scopus)
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Abstract

Savonnières, a French layered oolithic limestone, shows important ink-bottle effects. As a consequence, a great discrepancy is observed between the results of different techniques to determine the pore volume distribution. It is shown that mercury intrusion porosimetry results can be considered as the main drainage curve and are, for this kind of materials, not convenient to determine the apparent pore volume distribution due to hysteresis phenomena. The main wetting curve is obtained using image analysing techniques on SEM-micrographs, combined with pressure membrane apparatus results on capillary saturated samples. A simple structural hysteresis model is developed to predict the mercury intrusion porosimetry results, starting from the main wetting curve. The good agreement between theory and experiment verifies that the large difference between main wetting and main drainage curve can indeed be attributed to structural hysteresis. In this way, the presented technique gives, in addition to a better knowledge of the pore volume distribution, insight in the pore geometry and connectivity, which can serve as input for microstructure-based transport models.
Original languageEnglish
Pages (from-to)76-82
JournalMaterials and Structures
Volume34
Issue number2
DOIs
Publication statusPublished - 2001

Fingerprint

Pore structure
Mercury
Hysteresis
Wetting
Drainage
Calcium Carbonate
Bottles
Limestone
Ink
Membranes
Microstructure
Scanning electron microscopy
Geometry
Experiments

Cite this

Roels, S. ; Elsen, J. ; Carmeliet, J. ; Hens, H. / Characterisation of pore structure by combining mercury porosimetry and micrography. In: Materials and Structures. 2001 ; Vol. 34, No. 2. pp. 76-82.
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Characterisation of pore structure by combining mercury porosimetry and micrography. / Roels, S.; Elsen, J.; Carmeliet, J.; Hens, H.

In: Materials and Structures, Vol. 34, No. 2, 2001, p. 76-82.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Roels, S.

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AU - Carmeliet, J.

AU - Hens, H.

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AB - Savonnières, a French layered oolithic limestone, shows important ink-bottle effects. As a consequence, a great discrepancy is observed between the results of different techniques to determine the pore volume distribution. It is shown that mercury intrusion porosimetry results can be considered as the main drainage curve and are, for this kind of materials, not convenient to determine the apparent pore volume distribution due to hysteresis phenomena. The main wetting curve is obtained using image analysing techniques on SEM-micrographs, combined with pressure membrane apparatus results on capillary saturated samples. A simple structural hysteresis model is developed to predict the mercury intrusion porosimetry results, starting from the main wetting curve. The good agreement between theory and experiment verifies that the large difference between main wetting and main drainage curve can indeed be attributed to structural hysteresis. In this way, the presented technique gives, in addition to a better knowledge of the pore volume distribution, insight in the pore geometry and connectivity, which can serve as input for microstructure-based transport models.

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