Method for simultaneous determination of sorption isotherms and diffusivity of cement-based materials
(2008) In Cement and Concrete Research vol 38(no 1). p.89-94- Abstract
- A method for simultaneous determination of the diffusion and sorption properties of cement-based materials is presented. It is a gravimetric method where one small specimen is exposed to stepwise changes in relative humidity while its mass is being measured. As sorption in cement-based materials is slow, the change in relative humidity to the next level is made before final equilibrium has been reached on the previous level. Approximate final (equilibrium) levels are found by extrapolation using an exponential equation, and a factor is applied to correct for the fact that the sorption step does not start at equilibrium conditions. A correction for external mass transfer resistance is also included. The method can be used in desorption as... (More)
- A method for simultaneous determination of the diffusion and sorption properties of cement-based materials is presented. It is a gravimetric method where one small specimen is exposed to stepwise changes in relative humidity while its mass is being measured. As sorption in cement-based materials is slow, the change in relative humidity to the next level is made before final equilibrium has been reached on the previous level. Approximate final (equilibrium) levels are found by extrapolation using an exponential equation, and a factor is applied to correct for the fact that the sorption step does not start at equilibrium conditions. A correction for external mass transfer resistance is also included. The method can be used in desorption as well as absorption mode. Measurements of two materials are presented and compared with the results obtained using conventional methods. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/715207
- author
- Anderberg, Anders LU and Wadsö, Lars LU
- organization
- publishing date
- 2008
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Adsorption, Humidity, Sorption isotherm, Diffusion
- in
- Cement and Concrete Research
- volume
- vol 38
- issue
- no 1
- pages
- 89 - 94
- publisher
- Elsevier
- external identifiers
-
- wos:000251917300008
- scopus:36049024584
- ISSN
- 0008-8846
- DOI
- 10.1016/j.cemconres.2007.08.023
- language
- English
- LU publication?
- yes
- id
- 557b17f7-a2b0-4c55-b7e0-687e99aa2125 (old id 715207)
- date added to LUP
- 2016-04-01 14:25:11
- date last changed
- 2022-01-28 00:29:49
@article{557b17f7-a2b0-4c55-b7e0-687e99aa2125,
abstract = {{A method for simultaneous determination of the diffusion and sorption properties of cement-based materials is presented. It is a gravimetric method where one small specimen is exposed to stepwise changes in relative humidity while its mass is being measured. As sorption in cement-based materials is slow, the change in relative humidity to the next level is made before final equilibrium has been reached on the previous level. Approximate final (equilibrium) levels are found by extrapolation using an exponential equation, and a factor is applied to correct for the fact that the sorption step does not start at equilibrium conditions. A correction for external mass transfer resistance is also included. The method can be used in desorption as well as absorption mode. Measurements of two materials are presented and compared with the results obtained using conventional methods.}},
author = {{Anderberg, Anders and Wadsö, Lars}},
issn = {{0008-8846}},
keywords = {{Adsorption; Humidity; Sorption isotherm; Diffusion}},
language = {{eng}},
number = {{no 1}},
pages = {{89--94}},
publisher = {{Elsevier}},
series = {{Cement and Concrete Research}},
title = {{Method for simultaneous determination of sorption isotherms and diffusivity of cement-based materials}},
url = {{http://dx.doi.org/10.1016/j.cemconres.2007.08.023}},
doi = {{10.1016/j.cemconres.2007.08.023}},
volume = {{vol 38}},
year = {{2008}},
}