ASTM-C1699 › Standard Test Method for Moisture Retention Curves of Porous Building Materials Using Pressure Plates
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Scope
1.1 This test method specifies a laboratory procedure for the determination of the water retention curve (or moisture storage capacity) of porous building materials at very high relative humidity (RH) levels (≈ 95 to 100% RH) corresponding to the capillary moisture region of the sorption isotherm. This is achieved by using the pressure plate test apparatus. This technique was originally developed to study soil moisture content and eventually had been adapted to building construction materials.
1.2 At higher RH levels (≈ 95 to 100% RH) of the sorption isotherm (see Test Method C 1498
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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.
Significance and Use
The purpose of this test is to obtain, by means of a specified laboratory procedure, the values of the equilibrium moisture content at higher RH levels ((≈ 95 to 100%). These values are used either as means to characterize the material or as material characteristics needed as input to appropriate computer models that can simulate wetting or drying potential of individual building materials or material assemblies under specified environmental conditions.
Keywords
moisture content; pressure plate apparatus; water vapor sorption; ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar)
To find similar documents by ASTM Volume:
04.06 (Thermal Insulation; Building and Environmental Acoustics)
To find similar documents by classification:
91.100.10 (Cement. Gypsum. Lime. Mortar)
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Document Number
ASTM-C1699-09R23
Revision Level
2009 R23 EDITION
Status
Current
Modification Type
New
Publication Date
April 6, 2023
Document Type
Test Method
Page Count
4 pages
Committee Number
C16.33