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Sorption hysteresis and scanning in a flooring screed implications for moisture induced degradation

Anderberg, Anders LU and Wadsö, Lars LU (2005) 10th International Conference on Indoor Air Quality and Climate (Indoor Air 2005) In Indoor Air 2005: Proceedings of the 10th International Conference on Indoor Air Quality and Climate, Vols 1-5 p.3928-3932
Abstract
Sorption isotherms (moisture content as a function of relative humidity (RH) at equilibrium) are an important tool in designing buildings to limit moisture related problems. Normally only a single sorption curve is used so that each moisture content uniquely corresponds to one RH. Sometimes two curves are used, one curve for absorption and one for desorption, as it is well known that sorption has a strong hysteresis for most materials. However, in most situations, materials do not simply follow either absorption or desorption, but will follow scanning curves within the hystersis envelope. In this paper we discuss data on sorption hysteresis and scanning for a cement based flooring material. These data show that the RH-increase will be many... (More)
Sorption isotherms (moisture content as a function of relative humidity (RH) at equilibrium) are an important tool in designing buildings to limit moisture related problems. Normally only a single sorption curve is used so that each moisture content uniquely corresponds to one RH. Sometimes two curves are used, one curve for absorption and one for desorption, as it is well known that sorption has a strong hysteresis for most materials. However, in most situations, materials do not simply follow either absorption or desorption, but will follow scanning curves within the hystersis envelope. In this paper we discuss data on sorption hysteresis and scanning for a cement based flooring material. These data show that the RH-increase will be many times higher when the flooring material absorbs moisture from, e.g., water based adhesives, than would have been predicted by a model without scanning. Implications for expressing critical moisture levels are discussed. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
relative, humidity, moisture content, scanning, sorption isotherm, hysteresis
in
Indoor Air 2005: Proceedings of the 10th International Conference on Indoor Air Quality and Climate, Vols 1-5
pages
3928 - 3932
publisher
Tsinghua University Press
conference name
10th International Conference on Indoor Air Quality and Climate (Indoor Air 2005)
external identifiers
  • WOS:000233831206082
ISBN
7-89494-830-6
language
English
LU publication?
yes
id
aa0e5f9b-652d-4bcf-820a-6697df66906c (old id 1406431)
date added to LUP
2009-06-05 09:12:33
date last changed
2016-04-16 09:29:01
@misc{aa0e5f9b-652d-4bcf-820a-6697df66906c,
  abstract     = {Sorption isotherms (moisture content as a function of relative humidity (RH) at equilibrium) are an important tool in designing buildings to limit moisture related problems. Normally only a single sorption curve is used so that each moisture content uniquely corresponds to one RH. Sometimes two curves are used, one curve for absorption and one for desorption, as it is well known that sorption has a strong hysteresis for most materials. However, in most situations, materials do not simply follow either absorption or desorption, but will follow scanning curves within the hystersis envelope. In this paper we discuss data on sorption hysteresis and scanning for a cement based flooring material. These data show that the RH-increase will be many times higher when the flooring material absorbs moisture from, e.g., water based adhesives, than would have been predicted by a model without scanning. Implications for expressing critical moisture levels are discussed.},
  author       = {Anderberg, Anders and Wadsö, Lars},
  isbn         = {7-89494-830-6},
  keyword      = {relative,humidity,moisture content,scanning,sorption isotherm,hysteresis},
  language     = {eng},
  pages        = {3928--3932},
  publisher    = {ARRAY(0xad6c4f0)},
  series       = {Indoor Air 2005: Proceedings of the 10th International Conference on Indoor Air Quality and Climate, Vols 1-5},
  title        = {Sorption hysteresis and scanning in a flooring screed implications for moisture induced degradation},
  year         = {2005},
}