2. Analysis of Moisture Flow in Porous Building Materials Using X-ray Radiography Tine van Besien Staf Roels Jan Carmeliet Laboratory for Building Physics, Department of Civil Engineering

3. Analysis Moisture Phenomena - weighing of samples - moisture profiles --> destructive way -  -ray attenuation technique - NMR-technique... Non-destructive methods: --> measure point wise, interpolation time domain necessary

4. X-ray Radiography

6. Resolution Function of: - material - energy of the source - sample thickness  calibration measurements

7. Attenuation coefficients

10. Experiments - determination of moisture profiles - redistribution of hydrophobic agent in material - cracks - heterogeneous materials 1D 2D

14. Redistribution water-repellent

15. Aerated concrete

16. Crack in Brick Sample

17. Crack in Calcium Silicate sample

18. Problems Unstable source

22. Reflections?

24. Combination

25. Future experiments - water penetration through hydrophobic treated crack - drying of crack