ASTM D4253 PDF

More D 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 engineering judgment must be used in relating the engineering properties of soil to the state of compactness. Users of this standard are cautioned that compliance with Practice D does not in itself ensure reliable results. Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors.

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More D 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 engineering judgment must be used in relating the engineering properties of soil to the state of compactness. Users of this standard are cautioned that compliance with Practice D does not in itself ensure reliable results.

Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. Special molds 6. Scope 1. Therefore, test apparatus dimensions 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. 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 that 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 volume 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. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

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A number in parentheses indicates the year of last reapproval. This standard has been approved for use by agencies of the Department of Defense. Therefore, test apparatus dimen- sions 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 gravita- tional system. 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.

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Astm d4253

Product Details 1. Therefore, test apparatus dimensions 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. This standard has been written using the gravitational system of units when dealing with the inch-pound system.

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