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1.1 This test method covers collection and comparison of logs of thermalized-neutron counts and back-scattered gamma counts along horizontal or vertical air-filled access tubes.
1.2 The in-situ water content in mass per unit volume and the density in mass per unit volume of soil and rock at positions or in intervals along the length of an access tube are calculated by comparing the thermal neutron count rate and gamma count rates respectively to previously established calibration data.
1.3 The values stated in SI units are regarded as the standard. The inch-pound units given in parentheses may be approximate and are provided for information only.
1.4 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 hazards, see Section 6.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1452 Practice for Soil Investigation and Sampling by Auger Borings
D1586 Test Method for Penetration Test and Split/Barrel Sampling of Soils
D1587 Practice for Thin-Walled Tube Sampling of Soils
D2113 Practice for Diamond Core Drilling for Site Investigation
D2216 Test Method for Laboratory Determination of Water (Moisture) Content of Soil and Rock
D2922 Test Methods for Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth)
D2937 Test Method for Density of Soil in Place by the Drive-Cylinder Method
D3017 Test Method for Water Content of Soil and Rock in Place by Nuclear Methods (Shallow Depth)
D4428/D4428M Test Methods of Crosshole Seismic Testing
D4564 Test Method for Density of Soil in Place by the Sleeve Method
D5195 Test Method for Density of Soil and Rock In-Place at Depths Below the Surface by Nuclear Methods
D5220 Test Method for Water Content of Soil and Rock In-Place by the Neutron Depth Probe Method
ICS Number Code 71.040.50 (Physicochemical methods of analysis)
UNSPSC Code 11111501(Soil)
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ASTM D6031-96(2004), Standard Test Method for Logging In Situ Moisture Content and Density of Soil and Rock by the Nuclear Method in Horizontal, Slanted, and Vertical Access Tubes, ASTM International, West Conshohocken, PA, 2004, www.astm.orgBack to Top