ASTM-D2922 2004

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D2922-04 Standard Test Methods for Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth)

Published By	Publication Date	Number of Pages
ASTM	2004	6

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Category: ASTM

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Description

ASTM D2922-04

Historical Standard: Standard Test Methods for Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth)

ASTM D2922

Scope

1.1 This test method covers the determination of the total or wet density of soil and soil-rock mixtures by the attenuation of gamma radiation where the source and detector(s) remain on the surface (Backscatter Method) or the source or detector is placed at a known depth up to 300 mm (12 in.) while the detector(s) or source remains on the surface (Direct Transmission Method).

1.2 The density in mass per unit volume of the material under test is determined by comparing the detected rate of gamma radiation with previously established calibration data.

1.3 The values tested in SI units are to be regarded as the standard. The inch-pound equivalents may be approximate.

1.4 It is common practice in the engineering profession to concurrently use pounds to represent both a unit of mass (lbm) and a unit of force (lbf). 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, the use of balances or scales recording pounds of mass (lbm), or the recording of density in lbm/ft3 should not be regarded as nonconformance with this standard.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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. For specific Hazard statements, see Section 6.

Keywords

density; field density; nuclear methods

ICS Code

ICS Number Code 93.020 (Earth works. Excavations. Foundation construction. Underground works)

DOI: 10.1520/D2922-04

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Significance and Use
2	Interferences Apparatus Hazards Calibration Standardization and Reference Check
3	Procedure for Field Use Calculation of Results
4	Report Precision and Bias Keywords TABLE 1
5	A1. WET DENSITY CALIBRATION & VERIFICATION A1.1 Calibration A1.2 Verification A1.3 Calibration Response A1.4 Calibration Standards A1.5 Verification of an Existing Calibration
6	A2. DETERMINING PRECISION OF APPARATUS (Moved from Precision and Bias Section of the standard to an Annex) A2.1 Instrument Count Precision A2.2

Additional information

Standard Title	D2922-04 Standard Test Methods for Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth)
Published Code	ASTM
Publication Date	2004
Pages Count	6