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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Historical Version s – view previous versions of standard. Work Item s – proposed revisions of this asrm. The SWCC is also used in characterizing the shear strength and compressibility of unsaturated soils. The unsaturated hydraulic conductivity of soil is often estimated using properties of the SWCC and the saturated hydraulic conductivity.

The liquid is usually water and the gas is usually air. Other liquids may also be used, but caution must be exercised if the liquid astk used causes excessive shrinkage or swelling of the soil matrix.

ASTM D – Slope stability engineering – Eng-Tips

Thus, results obtained from this method should be applied to field situations with caution and by qualified personnel. The quality of the result produced by this standard depends on the competence of the personnel performing the asttm and the suitability of the equipment and facilities used.


Agencies that meet the criteria of Practice D are generally considered capable of competent and objective testing, sampling, inspection, etc.

Users of this standard are cautioned that compliance with Practice D does not in itself ensure reliable results. Reliable results depend on many factors.

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Practice D provides a means of evaluating some of these asm. SWCCs describe the relationship between suction and volumetric water content, gravimetric water content, or degree of water saturation. SWCCs are also referred to as soil water retention curves, soil water release curves, or capillary pressure curves. 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 chamber with gravimetric measurement are astn for suctions in the range 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 is suitable for making determinations in the range 0 to kPa.

D683 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 for 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 d6863 are regarded as the industry standard. In addition, they are representative of the significant digits that should generally be retained.

  ISO IEC 27007 PDF

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 atsm 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 ast, of this standard.

No other units of measurement are included in this standard.

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. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Link to Active This link will always route to the current Active version of the standard.