Conceptual Reference Database for Building Envelope Research Prev
Next

The application of X-ray absorption to building moisture transport studies

Baker, P. H., Bailly, D., Campbell, M., Galbraith, G. H., Mclean, R. C., Poffa, N. and Sanders, C. H.
2006
Measurement, 40(9-10): 951-959

Baker, P. H., Bailly, D., Campbell, M., Galbraith, G. H., Mclean, R. C., Poffa, N. and Sanders, C. H., (2006), "The application of X-ray absorption to building moisture transport studies", Measurement, 40(9-10): 951-959.
Abstract:
It is well accepted within the international research community that there is a requirement for a high resolution facility for carrying out multi-dimensional moisture content measurements under transient conditions. This investigative tool should be capable of accommodatingmaterial samples large enough to incorporate the various macroscopic features, including mortar joints andmaterial interfaces, which are known to exert a significant influence on moisture transport withinbuilding envelopes. Such a tool, based on the principle of X-ray absorption, is being developed at Glasgow Caledonian University. A brief description of the facility is given here, together with modifications which allow the imaging of samples to be generated using computer-aided tomography. Also reported are the results of liquid water diffusivity experiments carried out on four masonrymaterials. These formed part of the calibration and validation procedure. The test data, describing the evolution of moisture content with time at various locations from a wetting plane, were collapsed to single curves using the Boltzmann transformation. These curves were then fitted to yield liquid diffusivity for application within moisture simulation models. The relationships derived are based on a novel simplified approach, which is easier to apply than the complicated procedures generally adopted hitherto.

This publication in whole or part might be found online. Check the sources on the related article below. Or use search engines on the web.
Related Concepts

Author Information and Other Publications Notes
Baker, P. H.
  1. The influence of space discretization on the accuracy of numerical simulation of heat and moisture transport in porous building materials  
Bailly, D.
     
Campbell, M.
     
Galbraith, G. H.
'Department of Bziilding & Stirz,eying, Glasgow Caledonian University, Cozvcaddens Road, Glasgow G4 OBA, UK E-mail: ghga@gcal.ac.iik
  1. Evaluation of discretized transport properties for numerical modelling of heat and moisture transfer in building structures
  2. Moisture permeability data presented as a mathematical relationship
  3. Non-contact methods of measuring moisture concentration in external layers of building partitions. I--The influence of geometrical microstructure on the kinetics of moisture condensation on glass surfaces
  4. Nonisothermal moisture diffusion in porous building materials
  5. The determination of vapour and liquid transport coefficients as input to combined heat mass transfer models
  6. The effect of temperature on the moisture permeability of building materials
  7. The influence of space discretization on the accuracy of numerical simulation of heat and moisture transport in porous building materials
  8. The selection of appropriate flow potentials for moisture transport models
  9. The use of differential permeabilty in moisture transport modelling  
Mclean, R. C.
Energy Systems Research Unit, Department of Mechanical Engineering, University of Strathclyde, Glasgow, UK
  1. A technique for the prediction of the conditions leading to mould growth in buildings
  2. Development of a simulation tool for mould growth prediction in buildings
  3. Evaluation of discretized transport properties for numerical modelling of heat and moisture transfer in building structures
  4. Moisture permeability data presented as a mathematical relationship
  5. Nonisothermal moisture diffusion in porous building materials
  6. Prediction of toxigenic fungal growth in buildings by using a novel modelling system
  7. The determination of vapour and liquid transport coefficients as input to combined heat mass transfer models
  8. The effect of temperature on the moisture permeability of building materials
  9. The selection of appropriate flow potentials for moisture transport models
  10. The use of differential permeabilty in moisture transport modelling  
Poffa, N.
     
Sanders, C. H.
  1. Design parameters used to avoid interstitial condensation for a range of climates
  2. IEA-Annex 24, Final Report, Volume 2, Task 2: Environmental conditions
  3. Inaccuracies in standard meteorological low-speed wind data  


CRDBER, at CBS, BCEE, ENCS, Concordia,