Density of Soil Specimens
Wet and dry density of soils are important values for geotechnical engineers in determining over-burden stresses, void ratios, maximum compaction and percent compaction of soils. Density value can also aid in the evaluation of soil strength and sensitivity.
While reporting on soil density has been part of routine laboratory testing for years, there have been no standards that outlined procedures for density testing. However, Subcommittee D18.03 on Texture, Plasticity and Density Characteristics of Soils has now developed such a standard, D7263, Test Methods for Laboratory Determination of Density (Unit Weight) of Soil Specimens. The subcommittee is part of ASTM International Committee D18 on Soil and Rock.
“The applications of D7263 span many soil tests, including much more sophisticated testing,” says Bill Quinn, laboratory manager, AECOM, and chair of Subcommittee D18.03. Quinn notes the following areas in which soil density testing plays a role:
Quinn says that all interested parties are welcome to join in the standards developing activities of D18.03. “This particular standard will require an interlaboratory testing program to enable a precision and bias statement to be developed,” says Quinn. “An adequate test program will be established, testing protocols will be outlined, laboratories need to be contacted for participation and the data obtained will need to be summarized.”
Technical Information: Bill Quinn, AECOM, Vernon Hills, Ill.
ASTM Staff: Robert Morgan