Materials and structures vol:29 issue:187 pages:158-163
The use of electrical resistivity maps for the evaluation of ancient masonry is a well-known non-destructive measuring technique. However, these maps do, not only contain the information sought, i.e. the localisation of the inhomogeneities, but also, the influence of the physical layout and the geometrical boundaries on the measurements. These elements partly hide the desired information. Therefore, computer programs are developed in which this particular boundary effect is incorporated. This leads to maps of relative differences in resistivity that are a picture of the real anomalies in the structure. The evaluation and interpretation of the electrical resistivity maps are thereby made much simpler.