ASTM D6938

Full Name

ASTM D6938 – Standard Test Methods for In-Place Density and Water Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth)


This test method describes the procedures for measuring in-place density and moisture of soil and soil-aggregate by use of nuclear equipment (referred to as “gauge”).

The density of the material may be measured by direct transmission, backscatter, or backscatter/air-gap ratio methods. Measurements for water (moisture) content are taken at the surface in backscatter mode regardless of the mode being used for density.


acceptance testing; compaction test; construction control; dry density; field density; in-place density; nuclear methods, nuclear gauge; quality control; water content; wet density

ASTM D6938 Accredited Inspection Agency and Laboratory

Applied Testing & Geosciences, LLC is accredited for performing inspections and tests using the ASTM D6938 standard.

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