In 2007 – 2009, we worked on a research and development project on controlling and monitoring consolidation treatments for the cathedrals of Basel, Bern, Fribourg and Lausanne. These are all concerned by consolidation problems facing various sandstones – and we aided in developing methods for simple in-situ measurements in order to optimize consolidation in individual cases and to monitor its effect over time. Based on a literature review, we have selected a MOIST 200B of the hf sensor, a device emitting and receiving in return microwaves supposed to detect moisture in walls. The results of this measurement technique have unfortunately proved far too random to meet our needs.
We warmly thank the responsible persons for the cathedrals of Basel, Bern, Lausanne and Freiburg for their support during this project and to accept that the full report of this study is freely available here: in French or in German.
Some pictures of this project:
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