Development of IoT-based condition survey units to monitor salt damages on plastered and rendered surfaces

Vidovszky, István and Pintér, Farkas (2021) Development of IoT-based condition survey units to monitor salt damages on plastered and rendered surfaces. ARCHEOMETRIAI MŰHELY, 18 (1). pp. 45-53. ISSN 1786-271X

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Abstract

Moisture and salt-induced damages are common problems at heritage sites and buildings. Efficient solutions for complex salt-related problems frequently require the in-situ monitoring of surface changes (i.e. the behavior of salts and moisture) along with the periodical presence of an observer on-site, which is a time-consuming procedure. In the frame of this study, two simple, automated units were developed in order to investigate the changes caused by salt crystallization on a plastered laboratory test surface and an interior masonry structure. We present the development of remotely managed, automated, single-board computer-based condition survey units and the preliminary experience obtained during the test phases under laboratory and on-site conditions. The tests showed that our low-budget systems are able to monitor the alterations on the surfaces and detecting the climatic changes during the measuring period. The comparison and correlation of climatic data and digital images allow a direct interpretation of the behavior of salts on the surface.

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