ASTM D Standard Test Methods for In-Place Density and Water Content of Soil and Soil-Aggregate by Nuclear Methods (Shallow Depth). depth, etc.) Verify proper rebar sizes and placements. Verify proper reinforcing overlaps. Verify proper clearance and that chairs are. ASTM D Uploaded by Xavior. Standard Test Method for In-Place Density and Water Content of Soil and Soil- Aggregate by Nuclear Methods (Shallow.
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The water mass per unit volume is determined by the thermalizing or slowing of fast neutrons by hydrogen, a component of water. In addition, they are representative of the significant digits that should generally be retained. The nondestructive nature allows repetitive measurements at a single test location and statistical analysis of the results. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design. The values in inch-pound asfm ft — lb units are provided for information only.
The direct transmission is the preferred method. When divided by the density of water and then multiplied bythe water mass per unit volume is equivalent to the volumetric water content. For more information, contact: The water content most prevalent in engineering and construction activities is known as the gravimetric water content, w, and is the ratio of the mass of the water in pore spaces to the total mass of solids, expressed as a percentage.
Historical Version s – view previous versions of standard. Most gauges display this value directly.
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This test method describes the procedures for measuring in-place density and asym of soil and soil-aggregate by use of nuclear equipment. Measurements for water moisture content are taken at the surface in backscatter mode regardless of the mode being used for density.
Measurements for water moisture content are satm at the surface in backscatter mode regardless of the mode being used for density. 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.
ASTM D Standard
Asrm Quote Client Login. The dry density of the test sample is obtained by subtracting the water mass per unit volume from the test sample wet density Section For Individuals with needing special assistance for disabilities or limited English proficiency Please contact our Title VI specialist at The density of the test sample in mass per unit volume is calculated by comparing the detected rate of gamma radiation with previously established calibration data.
The total or wet density of soil and soil-aggregate is measured by the attenuation of gamma radiation where, in direct transmission, the source is placed at a known depth up to mm 12 atm. The quality of the result produced by this standard test method is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used.
Reliable results depend on many factors; Practice D provides a means of evaluating some of those factors. Soil testing Field Services: Link to Active This link will always route to the current Active asttm of the standard. Soil testing Back to Results Print. This places the gamma and neutron sources and the detectors in the same plane. The neutron source and the asgm neutron detector are both located at the surface of the material being tested. Most gauges display this value directly. Users of this standard are cautioned that compliance with Practice D does not in itself ensure reliable results.