TY - CONF A1 - Strangfeld, Christoph A1 - Stolpe, Heiko A1 - Kruschwitz, Sabine A2 - Schumann, R. T1 - Correlation between the electric impedance and the water layer thickness in partially saturated screed samples T2 - Berichtsband zur 10. CMM-Tagung - Innovative Feuchtemessung in Forschung und Praxis - Materialeigenschaften und Prozesse N2 - The moisture content of screed samples is monitored by means of embedded sensors. Relative humidity sensors and multi-ring-electrodes are used to measure the spatial moisture distribution during desorption. Based on the humidity data and the pore volume distribution, the moisture and the water layer thickness within the pore space are predicted. Slit shape as well as cylindrical pores are evaluated. Finally, the measured real part of the electrical impedance and the calculated water layer thickness are correlated. Based on the available data, a significant trend change of the impedance is documented at a water layer thickness of approximately 3 nm. This water layer thickness corresponds to a relative humidity of 88.3%. PB - CMM, Karlsruher Institut für Technologie CY - Karlsruhe T2 - 10. CMM Tagung CY - Ettlingen, Germany DA - 10.10.2019 KW - Material moisture KW - Screed KW - Embedded sensors KW - Electric impedance KW - Water layer thickness PY - 2019 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/49463 AN - OPUS4-49463 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-494636 VL - 10 SP - 79 EP - 102 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany