The application of geoelectrical tomographic techniques to the study of masonry structures: first tests and results
by
Mario Marchisio
Dip. Ingegneria Civile - Università di Pisa Via Diotisalvi 2 Pisa
Coauthors: A. Bianchi, L. D’Onofrio, G. Morelli, S. Sartini

In the last years, in the frame of the EC Project “ONSITEFORMASONRY” for the NDT (Non Destructive Tests) on masonry structures, some experiments of the application of geoelectrical tomographies were performed in several of the test-sites of the Project.. Our main task concerned the use of different micro-seismic methods on the walls. A few experiments with geoelectrical methods were performed on the same spots where we had other data.

The main problem for the measurements is due to the high contact resistance. We tested different kind of electrodes and some ticks to improve the contact. A high quality measuring instrumentation is necessary: in particular it must have a very high input impedance (10 M in our case). The inversion requires an accurate control of the data. The first results were very interesting, also compared to the other kind of tests.

A series of laboratory tests on different electrodes are under execution.

Some examples will be shown from the “Duomo” of Lucca (Italy), the Castle of Pisece (Slovenia), the Bottagisio Palace in Verona (Italy) and the Wartburg Castle (Eisenach, Germany).

Date received: September 11, 2004

Copyright © 2004 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # caon-41.