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Description of ASTM-D422 2007ASTM D422 - 63(2007)Standard Test Method for Particle-Size Analysis of SoilsActive Standard ASTM D422 | Developed by Subcommittee: D18.03 Book of Standards Volume: 04.08 ASTM D422Abstract This test method covers the quantitative determination of the distribution of particle sizes in soils. The distribution of particle sizes larger than 75 micrometers (retained on the No. 200 sieve) is determined by sieving, while the distribution of particle sizes smaller than 75 micrometers is determined by a sedimentation process using a hydrometer. The balances, stirring apparatus, hydrometer, sedimentation cylinder, thermometer, sieves, water bath or constant-temperature room, beaker, and timing device used in the method are specified. Sieve analysis, hydrometer analysis, and hygroscopic moisture analysis shall be performed on the sample soil. This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. 1. Scope 1.1 This test method covers the quantitative determination of the distribution of particle sizes in soils. The distribution of particle sizes larger than 75 ?m (retained on the No. 200 sieve) is determined by sieving, while the distribution of particle sizes smaller than 75 ?m is determined by a sedimentation process, using a hydrometer to secure the necessary data (Note 1 and Note 2). Note 1Separation may be made on the No. 4 (4.75 ?m), No. 40 (425 ?m), or No. 200 (75 ?m) sieve instead of the No. 10. For whatever sieve used, the size shall be indicated in the report. Note 2Two types of dispersion devices are provided: ( 1 ) a high-speed mechanical stirrer, and ( 2 ) air dispersion. Extensive investigations indicate that air-dispersion devices produce a more positive dispersion of plastic soils below the 20-m size and appreciably less degradation on all sizes when used with sandy soils. Because of the definite advantages favoring air dispersion, its use is recommended. The results from the two types of devices differ in magnitude, depending upon soil type, leading to marked differences in particle size distribution, especially for sizes finer than 20 m.
ASTM Standards D421 Practice for Dry Preparation of Soil Samples for Particle-Size Analysis and Determination of Soil Constants E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves E100 Specification for ASTM Hydrometers Keywords grain-size; hydrometer analysis; hygroscopic moisture; particle-size; sieve analysis; ICS Code ICS Number Code 91.100.30 (Concrete and concrete products) DOI: 10.1520/D0422-63R07 ASTM International is a member of CrossRef. ASTM D422This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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