Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 Archives of Thermodynamics

1 2008

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: IR non-destructive detection

Sortuj według:

Ogranicz wyniki do:

Detection of moisture in porous materials through infrared methods

Furmański P., Wiśniewski T., Wyszyńska E.

Archives of Thermodynamics

2008

Vol. 29, no. 1

19-39

Presence of liquid water is one of the agents responsible for damage of materials. A study on determination of the liquid water content in porous materials was carried out in the paper. At first a review of methods for moisture detection was performed. Then a new quantitative method, based on IR observation of variation in the surface temperature of the moist sample in the humid environment, is proposed. The mathematical model for the method was based on the fundamental assumption that the liquid phase appears in thermodynamic equilibrium with the water vapour in pores of the material. Analysis of the simplified solutions of the mathematical model is carried out for a common, red brick and relations between the water content and experimentally measurable parameters are presented. Finally, preliminary measurements on the moist material are done on a specially designed experimental stand using the infrared camera. It follows that the transient part of the surface temperature response is most suitable for determination of the water content in the porous material.