ASTM-D4644 › Standard Test Method for Slake Durability of Shales and Other Similar Weak Rocks
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Scope
1.1 This test method covers the determination of the slake durability index of a shale or other weak rock after three drying and two wetting cycles with abrasion effects.
1.2 Units—The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units, which are provided for information only and are not considered standard. Reporting of test results in units other than SI shall not be regarded as nonconformance with this test method.
1.3 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026.
1.3.1 The procedures used to specify how data are collected/recorded or calculated in this standard are regarded as the industry standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives; and it is common practice to increase or reduce significant digits of reported data to be commensurate with these considerations. It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design.
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.
Significance and Use
5.1 The test method is used to estimate qualitatively the durability of weak rocks through weakening and disintegration resulting from a standard two cycles of wetting and drying in the service environment. (1-7).3
5.2 This test method is used to assign quantitative durability index values to weak rocks. A primary example is the Franklin Rating System (1).
Note 1: The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing, sampling, inspection, and so forth. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.
Keywords
abrasion resistance; shale; slake durability; weak rocks;; ICS Number Code 91.100.15 (Mineral materials and products)
To find similar documents by ASTM Volume:
04.08 (Soil and Rock (I): D420 - D5876)
To find similar documents by classification:
91.100.15 (Mineral materials and products Including earth, sands, clay, slates, stones, etc.)
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Document Number
ASTM-D4644-16
Revision Level
2016 EDITION
Status
Current
Modification Type
Revision with Title Change
Publication Date
Nov. 1, 2016
Document Type
Test Method
Page Count
4 pages
Committee Number
D18.12