ASTM D6490-99(2014)
Standard Test Method for Water Vapor Transmission of NonFilm Forming Treatments Used on Cementitious Panels
- Standard No.
- ASTM D6490-99(2014)
- Release Date
- 1999
- Published By
- American Society for Testing and Materials (ASTM)
- Status
- Replace By
- ASTM D6490-99(2022)
- Latest
- ASTM D6490-99(2022)
- Scope
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.
1.1 This test method covers the determination of the rate at which water vapor passes through non film forming treatments, such as silanes, siloxanes and blends of silanes/siloxanes applied to cementitious substrates.
1.2 This test method covers the use of the wet cup technique, which most closely approaches the exterior conditions for use for these materials. Other conditions can be used if agreed upon between purchaser and supplier. Agreement should not be expected between results obtained by different methods or test conditions.
1.3 The values stated in SI units of measurement are designated as the standard. Factors for conversion to inch-pound units are given in 9.2.1.1 and 9.2.2.1.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
ASTM D6490-99(2014) Referenced Document
- ASTM D1193 Standard Specification for Reagent Water
- ASTM D1734 Standard Practice for Making Cementitious Panels for Testing Coatings*， 2022-01-01 Update
- ASTM D3924 Standard Specification for Standard Environment for Conditioning and Testing Paint, Varnish, Lacquer, and Related Materials
- ASTM D823 Standard Practices for Producing Films of Uniform Thickness of Paint, Varnish, and Related Products on Test Panels
- ASTM E104 Standard Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions
ASTM D6490-99(2014) history
- 2022 ASTM D6490-99(2022) Standard Test Method for Water Vapor Transmission of NonFilm Forming Treatments Used on Cementitious Panels
- 1999 ASTM D6490-99(2014) Standard Test Method for Water Vapor Transmission of NonFilm Forming Treatments Used on Cementitious Panels
- 1999 ASTM D6490-99(2006) Standard Test Method for Water Vapor Transmission of NonFilm Forming Treatments Used on Cementitious Panels
- 1999 ASTM D6490-99 Standard Test Method for Water Vapor Transmission of NonFilm Forming Treatments Used on Cementitious Panels
