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ASTM D422-63(2007)e2
Standard Test Method for Particle-Size Analysis of Soils (Withdrawn 2016)
8 стр.
Отменен
Электронный (pdf)Печатное издание
96.72 $ (включая НДС 20%)
Разработчик:
Зарубежные/ASTM
ICS:
13.300 Protection. Including performance requirements for dangerous goods, their handling, storage, transportation, marking, labelling, etc. / Защита от опасных грузов. Включая требования к рабочим характеристикам опасных грузов, их обработке, хранению, транспортированию, маркировке, этикетированию и т.д.91.100.30 Concrete. Including admixtures / Бетон и изделия из бетона
Сборник (ASTM):
04.08 Soil and Rock (I): D420 – D5876 / Грунт и Горные породы (I): D420 – D5876
Тематика:
Geotechnical Engineering
Описание
Причина отменыThis 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.

Formerly under the jurisdiction of Committee D18 on Soil and Rock, this test method was withdrawn in January 2016 in accordance with section 10.6.3 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.

Реферат

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.

Область применения

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.

Ключевые слова:
grain-size; hydrometer analysis; hygroscopic moisture; particle-size; sieve analysis