ASTM D2922 PDF

Astm d – Free download as PDF File .pdf), Text File .txt) or read online for free. ASTM D Standard Tests Methods for Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth) – Download as PDF File .pdf). Buy ASTM D TEST METHODS FOR DENSITY OF SOIL AND SOIL- AGGREGATE IN PLACE BY NUCLEAR METHODS (SHALLOW.

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In this system the pound lbf represents a unit of force weight. 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.

D222 inch-pound equivalents may be approximate. For quality astmm purposes in road construction, in-place density measurements at shallow depths must be as free of error as possible. Correction Mathematics ; Quality Subject Areas: These test methods cover 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 mm 12 in.

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New Soil and Rock Test Method Combines Elements from Soil Density and Water Content Standards

Thus, measured values of in-place density are found to be different from the controlled values. Cohesionless soils, for example, are sensitive to volume change during shear.

Link to Active This link will always route to the current Active version of the standard. Addition of moisture in such soils provides some cohesion that alters the error involved in a density measurement.

Specific plots for a given soil generally are not applicable to other soils. This implicitly combines two separate systems of units; that is, the absolute system and the gravitational system.

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Freedom of unknown errors must be achieved by means of developing density calibration curve s. For specific Hazard statements, see Section. Aatm is scientifically undesirable to combine the use of two separate sets of inch-pound units within a single standard. These test methods have been written using the gravitational system of units when dealing with the inch-pound system.

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All standardized measuring methods investigated require such correction plots. Stay on Page Continue to Compass.

This standard does not purport to address all of the safety concerns, if any, associated with its use. International Road Federation Publisher: Plots of measured values versus controlled values provide means for adjusting the values measured in the field for a specific soil. Sep 30 Find a library where document is available.

Other sources of errors exist with the nuclear standard test, ASTM d The paper discusses 1 the degree of errors in the investigated standardized in-place density measurements by comparing with known or controlled densities, and 2 the development of calibration curves for a selected soil.