ASTM D2922 PDF

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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It is scientifically undesirable to combine the use of two separate sets of inch-pound units within a single standard. This implicitly combines two separate systems of units; that is, the absolute system and the gravitational system.

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. International Road Federation Publisher: Sep 30 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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Thus, measured values of in-place density are found to be different from the controlled values.

Find a library where document is available. Correction Mathematics ; Quality Subject Areas: Other sources of d2292 exist with the nuclear standard test, ASTM d Stay on Page Continue to Compass. Link to Active This link will always route to the current Active version of the standard. For quality control purposes in road construction, ast, density measurements at shallow depths must be as free of error as possible. Cohesionless soils, for example, are sensitive to volume change during shear.

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

Addition of moisture in such soils provides some cohesion that alters the error involved in a density measurement. These test methods have been written using the gravitational system of units when dealing with the inch-pound system.

This standard does not purport to address all of the e2922 concerns, if any, associated with its use. The inch-pound equivalents may be approximate.

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In this system the pound lbf represents a unit of force weight. Plots of measured values versus controlled values provide means for adjusting the values measured in the field for a specific soil. All standardized measuring methods investigated require such correction plots.

Freedom of unknown errors must be achieved by means of developing density calibration curve s. Specific plots for a given soil generally are not applicable to other soils. For specific Hazard statements, see Section. 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.