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ASTM International - ASTM C1699-08

Standard Test Method for Moisture Retention Curves of Porous Building Materials Using Pressure Plates

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Organization: ASTM International
Publication Date: 15 October 2008
Status: inactive
Page Count: 4
ICS Code (Cement. Gypsum. Lime. Mortar): 91.100.10
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... View More

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), use of climatic chamber is not an option. This technique uses overpressure to extract water out of the pore structure of porous materials until equilibrium between the moisture content in the specimens and the corresponding overpressure is achieved. Using the pressure plate extractors, equilibrium can only be reached by desorption.

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.

Document History

May 1, 2015
Standard Test Method for Moisture Retention Curves of Porous Building Materials Using Pressure Plates
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...
May 1, 2009
Standard Test Method for Moisture Retention Curves of Porous Building Materials Using Pressure Plates
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...
ASTM C1699-08
October 15, 2008
Standard Test Method for Moisture Retention Curves of Porous Building Materials Using Pressure Plates
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...
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