ASTM D Standard Practice for Classification of Soils for Engineering ASTM D Standard Test Methods for Maximum Index Density and Unit Weight. GeoTesting Express is a provider of Soil Testing Services – ASTM D, Standard Test Methods for Maximum Index Density and Unit Weight of Soils Using a. Standard Test Method for Maximum Index Density and Unit Weight of Soil Using Vibratory Table.

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Historical Version s – view previous versions of standard. See Section 3 for descriptions of terms. However, the engineering properties, such as strength, compressibility, and permeability of a given soil, compacted by various methods to a given state of compactness can vary considerably.

Therefore, considerable atm judgment must be used in relating the engineering properties of soil to the state of compactness. In addition, there are published data to indicate that these test methods have a high degree of variability. The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used.


Users of this standard are cautioned that compliance with Practice D does not in itself ensure reliable results. Reliable sstm depend on many factors; Practice D provides a means of evaluating some of those factors. Therefore, test apparatus asstm and mass given in inch-pound units are regarded as the standard.

This implicitly combines two separate systems of units; that is, the absolute system and the gravitational system. It is scientifically undesirable to combine the use of two separate sets of inch-pound units within a single standard.

ASTM D Standard

This standard has been written using the gravitational system of units when dealing with the inch-pound system. In this system, the pound lbf represents a unit of force weight. However, balances or scales measure mass; and weight must be calculated.

In the inch-pound system, it is common to assume xstm 1 lbf is equal to 1 lbm. While reporting density is not regarded as nonconformance with this standard, unit weights should be calculated and reported since the results may be used to determine force or stress.


Density is mass per unit atsm whereas unit weight is force per unit volume. In this standard density is given only in SI units.

After the density has been determined, the unit weight is calculated in SI or inch-pound units, or both. In addition, they are representative of the significant digits that generally should be retained. It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design.

Active Risk Management

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Link to Active This link will always route to the current Active version of the standard.