TY - JOUR
T1 - Non-contact methods of measuring moisture concentration in external layers of building partitions III: Water vapour condensation on the cementitious surfaces
AU - Klemm, Agnieszka J.
AU - Klemm, Piotr
AU - Rozniakowski, Kazimierz
AU - Wojtatowicz, Tomasz W.
N1 - Originally published in: Building and Environment (2002), 37 (12), pp.1233-1240.
PY - 2002/12/1
Y1 - 2002/12/1
N2 - This paper presents the results of the larger study into a potential application of laser radiation for the detection of phase transition processes in low temperatures occurring on the surface layers of cementitious materials. An attempt was made to identify relationships between the environmental conditions—temperature and air humidity, and the selected parameters of the reflected light. Onset of the condensation process and formation of water microdrops on the surface of the material leads to the phase displacement of individual laser rays, which are represented by different speckle images. Although the analysis of parameters of the reflected light are very difficult in the case of porous materials because of highly developed roughness of the surface structure it has been proved that a dynamic study of the phase transition phenomena can be successfully carried out without mechanical intervention.
AB - This paper presents the results of the larger study into a potential application of laser radiation for the detection of phase transition processes in low temperatures occurring on the surface layers of cementitious materials. An attempt was made to identify relationships between the environmental conditions—temperature and air humidity, and the selected parameters of the reflected light. Onset of the condensation process and formation of water microdrops on the surface of the material leads to the phase displacement of individual laser rays, which are represented by different speckle images. Although the analysis of parameters of the reflected light are very difficult in the case of porous materials because of highly developed roughness of the surface structure it has been proved that a dynamic study of the phase transition phenomena can be successfully carried out without mechanical intervention.
KW - laser technology
KW - moisture condensation
KW - porous materials
KW - geometrical microstructure
U2 - 10.1016/S0360-1323(01)00123-8
DO - 10.1016/S0360-1323(01)00123-8
M3 - Article
JO - Building and Environment
JF - Building and Environment
SN - 0360-1323
ER -