RESISTANT-BASED MOISTURE CONTENT MEASUREMENTS ON WATER REPELLENT TREATED MORTAR AND BRICK

Author(s): Sachse, K. A., Littmann, K., Fege, R. L. and Oremek, X.
Paper category: Conference
Book title: XIII International Conference on Durability of Building Materials and Components - XIII DBMC
Editor(s): Marco Quattrone, Vanderley M. John
Print ISBN: none
e-ISBN: 978-2-35158-149-0
Publication year: 2015
Pages: 320-327
Total Pages: 8
Language: English

Abstract: In the context of this study the suitability of an electrical resistance based moisture content measurement method, which is known to guarantee reliable values for moisture contents of wood, were tested for selected mineral building materials with and without water repellent treatment. For this purpose specimens of cement-mortar and solid brick were produced. The water repellent treatment of the mortar was carried out by internal hydrophobation and surface treatment; the bricks were hydrophobated by surface treatment only. The specimens were provided with electrodes. For this purpose the measuring point at the tip of the electrodes was glued conductively into a borehole in the material. The remaining outer part of the electrodes was sealed with electrically isolating glue in order to establish a conductive connection in the middle of the specimens only. After storage in different climates the electrical resistance of the specimens was recorded using data logging devices. Based on gravimetrically measured moisture contents resistance characteristics for each material were established. A satisfying accuracy resulting from the comparison between gravimetrically measured and arithmetically developed material moisture contents confirmed the suitability of electrical resistance based moisture content measurements for selected treated and untreated mineral materials.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00