ASTM D 4647/D4647M : 2013 : REDLINE
Current
The latest, up-to-date edition.
Standard Test Methods for Identification and Classification of Dispersive Clay Soils by the Pinhole Test
English
01-01-2013
Important note : All end users must be registered with an Account prior to user licenses being assigned.CONTAINED IN VOL. 04.08, 2018 Defines test method presents a direct, measurement of the dispensability and consequent colloidal credibility of clay soils by causing water to flow through a small hole punched in a specimen.
| Committee |
D 18
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| DevelopmentNote |
Supersedes ASTM D 4647. (02/2013)
|
| DocumentType |
Redline
|
| Pages |
13
|
| PublisherName |
American Society for Testing and Materials
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| Status |
Current
|
1.1This test method presents a direct, measurement of the dispersibility and consequent colloidal erodibility of clay soils by causing water to flow through a small hole punched in a specimen. The results of the tests are qualitative and provide general guidance regarding dispersibility and erodibility. This test method is complemented by Test Method D4221.
1.2This test method and the criteria for evaluating test data are based upon results of several hundred tests on samples collected from embankments, channels, and other areas where clay soils have eroded or resisted erosion in nature (1).2
1.3Three alternative procedures for classifying the dispersibility of clay soils are provided as follows:
1.3.1Method A and Method C, adapted from Ref (1), classify soils into six categories of dispersiveness as: dispersibility (D1, D2), slight to moderately dispersive (ND4, ND3), and nondispersive (ND2, ND1).
1.4All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026.
1.5Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
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