1.1 This test method covers the determination of water content of soil and rock by the thermalization or slowing of fast neutrons where the neutron source and the thermal neutron detector both remain at the surface.
1.2 The water content in mass per unit volume of the material under test is determined by comparing the detection rate of thermalized or slow neutrons with previously established calibration data.
1.3 The values stated in SI units are to be regarded as the standard. The inch-pound equivalents may be approximate.
1.3.1 It is common practice in the engineering profession to concurrently use pounds to represent both a unit of mass (lbm) and of force (lbf). This implicitly combines two systems of units, that is, the absolute system and the gravitational system. This test method has been written using the absolute system for water content (kilograms per cubic metre) in SI units. Conversion to the gravitational system of unit weight in lbf/ft3 may be made by multiplying by
0.06243 or in kN/m3 by multiplying by
9.807. The recording of water content in pound-force per cubic foot should not be regarded as non-conformance with this test method although the use is scientifically incorrect.
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.
ASTM D3017-05 Referenced Document
ASTM D1556 Standard Test Method for Density and Unit Weight of Soil in Place by the Sand-Cone Method*, 2024-04-21 Update
ASTM D2216 Standard Test Method for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass
ASTM D2922 Standard Test Methods for Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth)
ASTM D2937 Standard Test Method for Field Determination of Soil Density by the Pushing Cylinder Method*, 2024-04-21 Update
ASTM D4718 Standard Practice for Correction of Unit Weight and Water Content for Soils Containing Oversize Particles
ASTM D3017-05 history
2005ASTM D3017-05 Standard Test Method for Water Content of Soil and Rock in Place by Nuclear Methods (Shallow Depth)
2004ASTM D3017-04 Standard Test Method for Water Content of Soil and Rock in Place by Nuclear Methods (Shallow Depth)
2001ASTM D3017-01 Standard Test Method for Water Content of Soil and Rock in Place by Nuclear Methods (Shallow Depth)
2001ASTM D3017-96e1 Standard Test Method for Water Content of Soil and Rock in Place by Nuclear Methods (Shallow Depth)