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Investigation on wax-impregnated wood: part 2: study of void spaces filled with air by He pycnometry, Hg intrusion porosimetry, and 3D X-ray imaging

Gunthard Scholz, Mario Zauer, Jan Van den Bulcke UGent, Denis Van Loo UGent, Alexander Pfriem, Joris Van Acker UGent and Holger Militz (2010) HOLZFORSCHUNG. 64(5). p.587-593
abstract
Although available on the market, hot melting wax treated wood is not studied in detail as such lacking knowledge on the quantification of wax and remaining air voids. Therefore, in this paper Scots pine (Pinus sylvestris L.) and beech (Fagus sylvatica L.) samples were impregnated with a hot melting amid wax. The apparent densities were measured with helium pycnometry and mercury intrusion porosimetry. The pore size distribution was determined by using mercury intrusion porosimetry and samples were visualized with 3D X-ray tomography. The remaining air void spaces were calculated with all three methods. The apparent densities ranged from 1.18 g cm-³ till 1.19 g cm-³ for treated pine and 1.21 g cm-³ till 1.23 g cm-³ for treated beech. As a result of the wax impregnation, the pore volume decreases from 65-68% to 12-13% for pine and from 53-58% to 7-9% for beech. The pore size distribution shifts to smaller pores. The ratio of the micropores measured by mercury intrusion porosimetry is overestimated. On the one hand blocked large pores are compressed by the movement of wax deposits under high pressure during the mercury intrusion porosimetry (“movement-effect”). On the other hand large pores remain unaccessible or are only accessible via smaller openings (“bottle-neck-effect”). Non-invasive 3D X-ray imaging detects such macropores but the size of the detected pores is limited by the obtained resolution. Therefore both mercury intrusion porosimetry and X-ray tomography are complementary techniques.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
ACETIC-ANHYDRIDE, PORE STRUCTURE, COMPUTED-TOMOGRAPHY, MERCURY POROSIMETER, wax impregnation, X-ray tomography, pore volume, pore size distribution, helium-pycnometry, mercury intrusion porosimetry, MICROTOMOGRAPHY, POROSITY, VOLUME, apparent density
journal title
HOLZFORSCHUNG
Holzforschung
volume
64
issue
5
pages
587 - 593
Web of Science type
Article
Web of Science id
000280627400007
JCR category
MATERIALS SCIENCE, PAPER & WOOD
JCR impact factor
1.307 (2010)
JCR rank
3/23 (2010)
JCR quartile
1 (2010)
ISSN
0018-3830
DOI
10.1515/HF.2010.090
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
978862
handle
http://hdl.handle.net/1854/LU-978862
date created
2010-06-16 09:38:21
date last changed
2011-07-12 11:01:22
@article{978862,
  abstract     = {Although available on the market, hot melting wax treated wood is not studied in detail as such lacking knowledge on the quantification of wax and remaining air voids. Therefore, in this paper Scots pine (Pinus sylvestris L.) and beech (Fagus sylvatica L.) samples were impregnated with a hot melting amid wax. The apparent densities were measured with helium pycnometry and mercury intrusion porosimetry. The pore size distribution was determined by using mercury intrusion porosimetry and samples were visualized with 3D X-ray tomography. The remaining air void spaces were calculated with all three methods. The apparent densities ranged from 1.18 g cm-{\textthreesuperior} till 1.19 g cm-{\textthreesuperior} for treated pine and 1.21 g cm-{\textthreesuperior} till 1.23 g cm-{\textthreesuperior} for treated beech. As a result of the wax impregnation, the pore volume decreases from 65-68\% to 12-13\% for pine and from 53-58\% to 7-9\% for beech. The pore size distribution shifts to smaller pores. The ratio of the micropores measured by mercury intrusion porosimetry is overestimated. On the one hand blocked large pores are compressed by the movement of wax deposits under high pressure during the mercury intrusion porosimetry ({\textquotedblleft}movement-effect{\textquotedblright}). On the other hand large pores remain unaccessible or are only accessible via smaller openings ({\textquotedblleft}bottle-neck-effect{\textquotedblright}). Non-invasive 3D X-ray imaging detects such macropores but the size of the detected pores is limited by the obtained resolution. Therefore both mercury intrusion porosimetry and X-ray tomography are complementary techniques.},
  author       = {Scholz, Gunthard and Zauer, Mario and Van den Bulcke, Jan and Van Loo, Denis and Pfriem, Alexander and Van Acker, Joris and Militz, Holger},
  issn         = {0018-3830},
  journal      = {HOLZFORSCHUNG},
  keyword      = {ACETIC-ANHYDRIDE,PORE STRUCTURE,COMPUTED-TOMOGRAPHY,MERCURY POROSIMETER,wax impregnation,X-ray tomography,pore volume,pore size distribution,helium-pycnometry,mercury intrusion porosimetry,MICROTOMOGRAPHY,POROSITY,VOLUME,apparent density},
  language     = {eng},
  number       = {5},
  pages        = {587--593},
  title        = {Investigation on wax-impregnated wood: part 2: study of void spaces filled with air by He pycnometry, Hg intrusion porosimetry, and 3D X-ray imaging},
  url          = {http://dx.doi.org/10.1515/HF.2010.090},
  volume       = {64},
  year         = {2010},
}

Chicago
Scholz, Gunthard, Mario Zauer, Jan Van den Bulcke, Denis Van Loo, Alexander Pfriem, Joris Van Acker, and Holger Militz. 2010. “Investigation on Wax-impregnated Wood: Part 2: Study of Void Spaces Filled with Air by He Pycnometry, Hg Intrusion Porosimetry, and 3D X-ray Imaging.” Holzforschung 64 (5): 587–593.
APA
Scholz, G., Zauer, M., Van den Bulcke, J., Van Loo, D., Pfriem, A., Van Acker, J., & Militz, H. (2010). Investigation on wax-impregnated wood: part 2: study of void spaces filled with air by He pycnometry, Hg intrusion porosimetry, and 3D X-ray imaging. HOLZFORSCHUNG, 64(5), 587–593.
Vancouver
1.
Scholz G, Zauer M, Van den Bulcke J, Van Loo D, Pfriem A, Van Acker J, et al. Investigation on wax-impregnated wood: part 2: study of void spaces filled with air by He pycnometry, Hg intrusion porosimetry, and 3D X-ray imaging. HOLZFORSCHUNG. 2010;64(5):587–93.
MLA
Scholz, Gunthard, Mario Zauer, Jan Van den Bulcke, et al. “Investigation on Wax-impregnated Wood: Part 2: Study of Void Spaces Filled with Air by He Pycnometry, Hg Intrusion Porosimetry, and 3D X-ray Imaging.” HOLZFORSCHUNG 64.5 (2010): 587–593. Print.