Evaluation and monitoring of water diffusion into stone porous materials by means of innovative IR thermography techniques
Articolo
Data di Pubblicazione:
2018
Citazione:
Evaluation and monitoring of water diffusion into stone porous materials by means of innovative IR thermography techniques / N.G. Ludwig, E. Rosina, A. Sansonetti. - In: MEASUREMENT. - ISSN 0263-2241. - 118(2018 Mar), pp. 348-353. [10.1016/j.measurement.2017.09.002]
Abstract:
This paper shows the application of two innovative infrared thermography (IRT) methods for the evaluation of
water transport phenomena through the outer layers of porous stone materials. An infrared camera measured:
(a) the moisture stain due to the water absorption after having spilled a drop on the stone surface and (b) the
”moisture ring” around the damp surface, after the contact between a soaked round sponge and the stone
surface. The time of spreading and the geometric shape of the damped area depend on the porosity of the stone
material and are useful to characterize the physical stone features. In addition, monitoring the evolution of the
moisture ring by IRT allows implementing and optimize the data coming from protocols of water repellent
products with data coming from the “contact sponge measures”. Moreover, moisture ring test links IRT and
laboratory tests characterizing the transport phenomena of liquid and water vapour in porous building materials.
Thirty specimens of marble, calcarenite and sandstone were tested with steady methods (dry index and water
absorption by capillarity), that validated the data provided by the two innovative IRT techniques.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
evaporation; porosity; IR thermography; contact sponge; moisture ring; spilling drop
Elenco autori:
N.G. Ludwig, E. Rosina, A. Sansonetti
Link alla scheda completa: