Nondestructive evaluation of concrete structures by nonstationary thermal wave imaging

Applications of Infrared Thermography for Non-destructive Characterization of Concrete Structures

“…Typical applications of passive thermography includes seepage/moisture assessment, insulation problems in buildings, condition monitoring, structural health monitoring, etc. However, due to the limited depth of penetration and inability in providing the quantitative assessment for the sub-surface defects deep inside the test specimen, restricts its applicability for NDT&E applications [13][14][15][16][17][18][19][20][21].…”

“…This present chapter highlights the capabilities of aperiodic linear frequency modulated thermal wave imaging (LFMTWI) and the associated post-processing techniques for detection of corrosion in rebar [18][19][20][21]. In LFMTWI, the surface of the test specimen is heated by driving the heat sources with a linear frequency modulated heat flux, which results into a similar frequency modulated temperature distribution over it, with a mean rise in temperature depending on the total duration of the excitation.…”

“…In view of their merits, always whole-field, noncontact and volumetric NDT&E techniques are preferable over the others. Infrared thermography (IRT) is a well-established tool in the field of non-destructive testing and evaluation [13][14][15][16][17][18][19][20][21].…”

Complimentary Coded Thermal Wave Imaging Scheme for Thermal NonDestructive Testing and Evaluation

“…It has numerous applications in aerospace, electrical, mechanical, construction and medical fields [1]. Various approaches of IRT have been proposed by several research groups based on the employed thermal stimulus and the post-processing analysis schemes [11][12][13][14][15][16][17][18][19][20]. Widely used IRT approaches either use pulse or mono-frequency sinusoidal thermal stimulus [1][2][3][4][5].…”