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Proceedings Paper

Transient thermal NDT and E of defects in building materials
Author(s): N. P. Avdelidis; D. Stavrakas; A. Moropoulou
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Paper Abstract

In this work, infrared thermography (IRT) was used for the investigation of structural materials using the active approach. Four types of building materials were examined; three types of porous stone (from Rhodes, Cyprus, Rethymno - Crete) and one type of marble (Dionysus). Specimens containing self-induced defects of known dimensions and depths were studied. The samples were heated externally (thermal excitation) and thermograms were recorded continuously at the transient phase. Mathematical - thermal modelling enabling the modelling of the investigated subsurface defects, using the thermocalc 3-D software, was also implemented. Then, quantification analysis (i.e. temperature - time plots, as well as thermal contrast curves) from the experimental tests, as well as from the use of thermal modelling runs took place, indicating the thermal behaviour of building materials containing such defects. The results of this research show that IRT can be used for the detection and quantification of defects in structural materials.

Paper Details

Date Published: 18 April 2006
PDF: 6 pages
Proc. SPIE 6205, Thermosense XXVIII, 620516 (18 April 2006); doi: 10.1117/12.665415
Show Author Affiliations
N. P. Avdelidis, TWI Technology Ctr. in Wales (United Kingdom)
D. Stavrakas, National Technical Univ. of Athens (Greece)
A. Moropoulou, National Technical Univ. of Athens (Greece)


Published in SPIE Proceedings Vol. 6205:
Thermosense XXVIII
Jonathan J. Miles; G. Raymond Peacock; Kathryn M. Knettel, Editor(s)

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