| NUKLEONIKA 2012, 57(4):529-535
THERMAL NEUTRON RADIOGRAPHY STUDIES OF DRYING
OF RECTANGULAR BLOCKS OF WET MORTAR
Izabela M. Fijał-Kirejczyk1, Jacek J. Milczarek1, Frederick C. de Beer2,
Mabuti J. Radebe2, Gabriel Nothnagel2, Joanna Żołądek-Nowak1
1 National Centre for Nuclear Research (NCBJ),
7 Andrzeja Sołtana Str., 05-400 Otwock/Świerk, Poland
2 Radiation Science, Necsa – South African Nuclear Energy Corp. Ltd.,
Church Street West Extension, Pelindaba, Pretoria, 0001, South Africa
The convectional drying of rectangular block of wet mortar was investigated with thermal neutron radiography technique supplemented with traditional mass and temperature measurements. The time evolution of the drying process was recorded for rectangular sample of aged mortar before and after painting its lateral sides. The receding boundary of the central core wet region was observed in the advanced stage of the process. The size, shape and water content of that region were determined for both cases of non-painted and painted sample. It was shown that in the advanced drying process the receding drying front exists irrespectively of the drying pattern observed at the early period of drying.
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