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Test of four different experimental methods to determine sorption isotherms

Johannesson, Björn LU and Janz, Mårten LU (2002) In Journal of Materials in Civil Engineering 14(6). p.471-477
Abstract
One important property of materials is their moisture fixation capacity, i.e., their ability to hold moisture at different relative humidities. The sorption isotherm is one of the main input data in moisture diffusion models, and it can also be used to evaluate properties of the microstructure. We have used four different methods to measure the sorption isotherm of sandstone and porous glass. The first method was to equilibrate samples over saturated salt solutions. The second was a sorption balance in which small material samples were weighed as they were exposed to different relative humidities. The third method was the pressure plate extractor, in which a totally wet sample was equilibrated at various overpressures, corresponding to... (More)
One important property of materials is their moisture fixation capacity, i.e., their ability to hold moisture at different relative humidities. The sorption isotherm is one of the main input data in moisture diffusion models, and it can also be used to evaluate properties of the microstructure. We have used four different methods to measure the sorption isotherm of sandstone and porous glass. The first method was to equilibrate samples over saturated salt solutions. The second was a sorption balance in which small material samples were weighed as they were exposed to different relative humidities. The third method was the pressure plate extractor, in which a totally wet sample was equilibrated at various overpressures, corresponding to certain relative humidities. The fourth method was a newly developed microcalorimetric technique to measure sorption isotherms. Despite the different natures of the methods, a satisfying agreement was found. (10 refs.) (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Isotherms, Civil engineering, Sorption, Moisture, Atmospheric humidity, Diffusion, Sandstone, Microcalorimetric technique, Porous materials
in
Journal of Materials in Civil Engineering
volume
14
issue
6
pages
471 - 477
publisher
American Society of Civil Engineers (ASCE)
external identifiers
  • scopus:0036869324
ISSN
0899-1561
DOI
10.1061/(ASCE)0899-1561(2002)14:6(471)
language
English
LU publication?
yes
id
9262d48c-38a4-4eee-a9fe-8e1b849dd0e4 (old id 975644)
date added to LUP
2008-06-16 13:28:00
date last changed
2017-01-01 07:25:56
@article{9262d48c-38a4-4eee-a9fe-8e1b849dd0e4,
  abstract     = {One important property of materials is their moisture fixation capacity, i.e., their ability to hold moisture at different relative humidities. The sorption isotherm is one of the main input data in moisture diffusion models, and it can also be used to evaluate properties of the microstructure. We have used four different methods to measure the sorption isotherm of sandstone and porous glass. The first method was to equilibrate samples over saturated salt solutions. The second was a sorption balance in which small material samples were weighed as they were exposed to different relative humidities. The third method was the pressure plate extractor, in which a totally wet sample was equilibrated at various overpressures, corresponding to certain relative humidities. The fourth method was a newly developed microcalorimetric technique to measure sorption isotherms. Despite the different natures of the methods, a satisfying agreement was found. (10 refs.)},
  author       = {Johannesson, Björn and Janz, Mårten},
  issn         = {0899-1561},
  keyword      = {Isotherms,Civil engineering,Sorption,Moisture,Atmospheric humidity,Diffusion,Sandstone,Microcalorimetric technique,Porous materials},
  language     = {eng},
  number       = {6},
  pages        = {471--477},
  publisher    = {American Society of Civil Engineers (ASCE)},
  series       = {Journal of Materials in Civil Engineering},
  title        = {Test of four different experimental methods to determine sorption isotherms},
  url          = {http://dx.doi.org/10.1061/(ASCE)0899-1561(2002)14:6(471)},
  volume       = {14},
  year         = {2002},
}