The precision and bias of the test methods are discussed in the standard, including the sources of error and the limitations of the methods.

ASTM D4546-21 is a standard test method that provides guidelines for determining the in situ field density and water content of soil and soil-aggregate base materials. This standard is widely used in the construction industry to ensure that the soil or soil-aggregate base materials meet the required specifications for density and water content.

The in situ field density and water content of soil and soil-aggregate base materials are critical parameters that affect the stability and performance of pavements, foundations, and other structures built on these materials. The test methods described in ASTM D4546-21 provide a means of determining these parameters in the field, allowing for the evaluation of the material's suitability for construction.