In the EU SMooHS project, a potential-difference measurement node was developed in combination with electrodes based on silver/silver-chloride for the selective detection of chloride salts in porous masonry materials. For validation of the sensors, capillary absorption tests were carried out with different NaCl solution concentrations on highly porous stones, red bricks and hydraulic lime mortar under lab conditions. Masonry walls placed in outdoor climate conditions in Bologna were preloaded by capillary suction with diluted NaCl solutions for several months. The salt migration and content were monitored with the developed wireless sensor system. The recorded monitoring data in a masonry wall were compared with the distribution of chloride concentration obtained by chemical analysis after 9 months of natural ageing.
Colla C., Gruener F., Gabrielli E., Frick J. (2011). Monitoring of salt content and mobility in masonry materials. STUTTGART : Fraunhofer IRB.
Monitoring of salt content and mobility in masonry materials
COLLA, CAMILLA;GABRIELLI, ELENA;
2011
Abstract
In the EU SMooHS project, a potential-difference measurement node was developed in combination with electrodes based on silver/silver-chloride for the selective detection of chloride salts in porous masonry materials. For validation of the sensors, capillary absorption tests were carried out with different NaCl solution concentrations on highly porous stones, red bricks and hydraulic lime mortar under lab conditions. Masonry walls placed in outdoor climate conditions in Bologna were preloaded by capillary suction with diluted NaCl solutions for several months. The salt migration and content were monitored with the developed wireless sensor system. The recorded monitoring data in a masonry wall were compared with the distribution of chloride concentration obtained by chemical analysis after 9 months of natural ageing.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
