GeoTesting Express is a provider of Soil Testing Services – ASTM D, Standard Test Methods for Determination of the Soil Water Characteristic Curve for. This standard is issued under the fixed designation D ; the number 1 This test method is under the jurisdiction of ASTM Committee D18 on Soil and. Purchase your copy of ASTM D – 16 as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available.

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SWCCs describe the relationship between suction and volumetric water content, gravimetric water content, or degree of water saturation. Ast are also referred to as soil water retention curves, soil water release curves, or capillary pressure curves.

ASTM D6836 – 16

Method A hanging column is suitable for making determinations for suctions in the range of 0 to 80 kPa. Method B pressure chamber with volumetric measurement and Method C pressure astj with gravimetric measurement are suitable for suctions in the axtm of 0 to kPa.

Method D chilled mirror hygrometer is suitable for making determinations for suctions in the range of kPa to MPa. Method E centrifuge method dd6836 suitable for making determinations in the range 0 to kPa.


Method A typically is used for coarse soils with little fines that drain readily. Methods B and C typically are used for finer soils, which retain water more tightly. Method E is typically used asmt coarser soils where an appreciable amount of water can be extracted with suctions up to kPa.

The methods may be combined to provide a detailed description of the soil water characteristic curve. The procedures in Practice D that are used to specify how data are collected, recorded, and calculated are regarded as the industry standard.

In addition, they are representative of the significant digits that should generally be retained.

The procedures do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the objectives of the user. Increasing or reducing the significant digits of reported data to be commensurate with these considerations is common practice. Consideration of the significant digits to be used in analysis methods for engineering design is beyond the scope of this standard. No other units of measurement are included in this standard.

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ASTM D – Slope stability engineering – Eng-Tips

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