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ASTM D422-63(2007)e2

Current Revision

Standard Test Method for Particle-Size Analysis of Soils

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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 μm (retained on the No. 200 sieve) is determined by sieving, while the distribution of particle sizes smaller than 75 μm is determined by a sedimentation process, using a hydrometer to secure the necessary data (Note 1 and Note 2).

Note 1: Separation may be made on the No. 4 (4.75-mm), No. 40 (425-μm), or No. 200 (75-μm) sieve instead of the No. 10. For whatever sieve used, the size shall be indicated in the report.

Note 2: Two 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-μm 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 μm.


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.


SDO ASTM: ASTM International
Document Number D422
Publication Date Oct. 15, 2007
Language en - English
Page Count 8
Revision Level 63(2007)e2
Supercedes
Committee D18.03
Publish Date Document Id Type View
Oct. 15, 2007 D0422-63R07E02 Revision
Oct. 15, 2007 D0422-63R07E01 Revision
Nov. 10, 2002 D0422-63R02E01 Revision
Oct. 15, 2007 D0422-63R07 Reaffirmation
Nov. 10, 2002 D0422-63R02 Reaffirmation
March 10, 1998 D0422-63R98 Reaffirmation