TY - JOUR A1 - Válek, J. A1 - Kruschwitz, Sabine A1 - Wöstmann, Jens A1 - Kind, Thomas A1 - Valach, J. A1 - Köpp, Christian A1 - Lesák, J. T1 - Nondestructive investigation of wet building material: multimethodical approach T2 - Journal of performance of constructed facilities N2 - Building stones are porous media and they can deteriorate through moisture ingress and secondary damage such as crystallization of soluble salts. Not only is this due to the increasing number of flood events in the past years but also structural damages of houses from activity such as leakage or rising moisture (groundwater) are the main causes. The potential benefit of several nondestructive testing methods to assess water damage in building stone has been studied in a field-scale experiment. Three testing walls made of fired clay brick, sandstone, and spongilite were flooded and their drying behavior monitored using infrared thermography, complex resistivity, ground penetrating radar, and ultrasonics. The results were compared to the average moisture content determined by gravimetric weighing of the specimens. Qualitatively, the results of the different nondestructive testing methods matched well. But in terms of quantitative data, some scatter was observed and the results should be viewed with care. Collecting time-consuming calibration data would help to overcome this problem, but especially when dealing with historic building structures, this is not always possible in practice. PB - Soc. CY - Reston, Va. KW - Diagnostics KW - Moisture KW - Masonry KW - Nondestructive tests KW - Electrical PY - 2010 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/22355 AN - OPUS4-22355 SN - 0887-3828 VL - 24 IS - 5 SP - 462 EP - 472 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany