Читать книгу Monument Future - Siegfried Siegesmund - Страница 387

The complementarity of the infrared thermography and electrical imaging methods is highlighted by showing the different relevant saturation ranges of both methods. This allows to establish the basis to the creation of a protocol which can be used to monitor the effects of changes of water content in the porous media. Illustration is given in the paper with limestones building material.

Calibration procedures are developed, and tests are carried out to highlight the degree of saturation by mean of electrical and IR thermography imaging. The identification of the material properties (like petrophysical properties) can be used to describe phenomenological patterns affecting the in-situ structure. Nevertheless, such point of view must be completed to highlight accurately the water content and its evolution to better understand the damages and evolution of the historical monuments.

The two combined methods seem to be well adapted to characterize the water transfer in the structures and for a better accuracy of the proposed diagnosis, the conclusions coming from another calibration scenario will be added.

Such a combination of NDT is very promising regarding other generally used methods.