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

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Presentation transcript:

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

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

X-ray Radiography

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

Attenuation coefficients

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

Redistribution water-repellent

Aerated concrete

Crack in Brick Sample

Crack in Calcium Silicate sample

Problems Unstable source

Reflections?

Combination

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