ASTM C1699-09(2015)
Standard Test Method for Moisture Retention Curves of Porous Building Materials Using Pressure Plates

Standard No.

ASTM C1699-09(2015)

Release Date

2009

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM C1699-09(2023)

Latest

ASTM C1699-09(2023)

Scope

4.1 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 ((

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 C1498), 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.

ASTM C1699-09(2015) Referenced Document

• ASTM C1498 Standard Test Method for Hygroscopic Sorption Isotherms of Building Materials
• ASTM D2325 Standard Test Method for Capillary-Moisture Relationships for Coarse- and Medium-Textured Soils by Porous-Plate Apparatus
• ASTM D3152 Standard Test Method for Capillary-Moisture Relationships for Fine-Textured Soils by Pressure-Membrane Apparatus
• ASTM E337 Standard Test Method for Measuring Humidity with a Psychrometer (the Measurement of Wet- and Dry-Bulb Temperatures)

ASTM C1699-09(2015) history

• 2023 ASTM C1699-09(2023) Standard Test Method for Moisture Retention Curves of Porous Building Materials Using Pressure Plates
• 2009 ASTM C1699-09(2015) Standard Test Method for Moisture Retention Curves of Porous Building Materials Using Pressure Plates
• 2009 ASTM C1699-09 Standard Test Method for Moisture Retention Curves of Porous Building Materials Using Pressure Plates
• 2008 ASTM C1699-08 Standard Test Method for Moisture Retention Curves of Porous Building Materials Using Pressure Plates