ASTM D7928 Standard Test Method for Particle-Size Distribution (Gradation) of Fine-Grained Soils Using the Sedimentation (Hydrometer) Analysis -- eLearning Course

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Price: $115
About the Course

This test method covers the quantitative determination of the distribution of particle sizes of the fine-grained portion of soils. The sedimentation by hydrometer method is used to determine the particle-size distribution (gradation) of the material that is finer than the No. 200 (75-µm) sieve and larger than about 0.2-µm. The test is performed on material passing the No. 10 (2.0-mm) or finer sieve and the results are presented as the mass percent finer of this fraction versus the log of the particle diameter

Learning Outcome

By the end of this course, you will be able to:

  • Identify apparatus, reagents, and materials used for determination of distribution of particle sizes of fine-grained portion of soils, including dispersion apparatus and agitator.
  • Define sampling requirements as outlined in ASTM D7928, including minimum dry mass.
  • Recognize procedure for preparation of test specimen, including those for both moist and air-dried preparation.
  • Recall procedure for preparation and verification of apparatus, including those for hydrometer readings and meniscus correction.
  • Recall procedure for determination of distribution of particle sizes of the fine-grained portion of soils.
  • Recognize calculation procedure as outlined in ASTM D7928, including those for particle diameter in suspension.
  • Identify reporting requirements outlined in ASTM D7928.


Anyone who runs the D7928 test method or who needs an understanding of the test method and how it is properly run.

Certificate and CEUs

CEUs: .2 or 2 PDH

Certificate: A certificate is available upon successful completion of the course and an 80% or higher score on the exam.

ASTM Standards Referenced

ASTM D7928

Related Products

This training course is part of the following eLearning program:


1 year online subscription for a Single User Only via username/password. Requires internet access.

For pricing for Multi-User access or for more information, please contact sales here or call 1-877-909-ASTM.

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