Standard Test Method for Water Vapor Transmission of NonFilm Forming Treatments Used on Cementitious Panels

Importancia y uso:

4.1 One of the factors affecting the performance provided by a cementitious treatment is how readily water vapor passes through it. Hence, the water vapor transmission characteristics of treatments are important in assessing their performance in practical use.

4.2 The purpose of this test method is to obtain values of water vapor transfer through treatments that range in permeability from high to low. These values are for use in design, manufacture, and marketing.

4.3 Water vapor transmission is not a linear function of film thickness, temperature or relative humidity.

4.4 Values of water vapor transmission rate (WVT) and water vapor permeance (WVP) can be used in the relative rating of treatments only if the treatments are tested under the same closely controlled conditions of temperature and relative humidity.

Subcomité:

D01.47

Volúmen:

06.02

Número ICS:

87.040 (Paints and varnishes)

Palabras clave:

permeability; permeance; perms; water vapor permeance; water vapor transmission;