18 research outputs found
Untersuchung von Feuchtetransport mittels numerischer Modellierung und Neutronentransmissionsanalyse
Get PDFMoisture transport in porous building materials is described by a transport model that expresses the action of the several transport mechanisms of liquid water and water vapor in the porous system by a single material specific transfer coefficient. This parameter has to be determined by experimental measurement of moisture distributions inside samples exposed to known initial and boundary conditions. Neutron radiography is employed as experimental method because of its high sensitivity and good spatial resolution. The moisture distribution is determined from the raw data obtained in the measurement by a calculation procedure based on a signal transfer model of the neutron transmission. This approach is illustrated by two examples: the drying of a plain brick sample and the drying of a composite sample consisting of two brick elements separated by a layer of morta
PROPERTIES OF THE RADIOGRAPHY FACILITY NEUTRA AT SINQ AND ITS POTENTIAL FOR USE AS EUROPEAN REFERENCE FACILITY
No full textTHE INVESTIGATION OF HIGHLY ACTIVATED SAMPLES BY NEUTRON RADIOGRAPHY AT THE SPALLATION SOURCE SINQ
No full textWater uptake experiments of historic construction materials from Venice by neutron imaging and PGAI methods
No full textVisualization and quantification of weathering effects on capillary water uptake of natural building stones by using neutron imaging
No full textDetermination of moisture distributions in porous building materials by neutron transmission analysis
No full textVisualization and quantification of water movement in porous cement-based materials by real time thermal neutron radiography: Theoretical analysis and experimental study
No full textTHE COMPLEMENTARY USE OF NEUTRONS AND X-RAYS FOR THE NON-DESTRUCTIVE INVESTIGATION OF ARCHAEOLOGICAL OBJECTS FROM SWISS COLLECTIONS*
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