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  • ASTM
    D2950/D2950M-11 Standard Test Method for Density of Bituminous Concrete in Place by Nuclear Methods
    Edition: 2011
    $58.00
    Unlimited Users - 1 Loc per year

Description of ASTM-D2950 2011

ASTM D2950 / D2950M - 11

Standard Test Method for Density of Bituminous Concrete in Place by Nuclear Methods

Active Standard ASTM D2950 / D2950M | Developed by Subcommittee: D04.21

Book of Standards Volume: 04.03




ASTM D2950 / D2950M

Significance and Use

The test method described is useful as a rapid, nondestructive technique for determining the in-place density of compacted bituminous mixtures.

With proper calibration and confirmation testing, the test method is suitable for quality control and acceptance testing of compacted bituminous concrete.

The test method can be used to establish the proper rolling effort and pattern to achieve the required density.

The non-destructive nature of the test allows repetitive measurements to be made at a single test location between roller passes and to monitor changes in density.

The density results obtained by this test method are relative. Correlation with other test methods such as D1188 or D2726 are required to convert the results obtained using this method to actual density. It is recommended that at least seven core densities and seven nuclear densities be used to establish a conversion factor. A new factor must be established at any time a change is made in the paving mixture or in the construction process.

1. Scope

1.1 This test method describes a test procedure for determining the density of bituminous concrete 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 300 mm [12 in.] while the detector or source remains on the surface (Direct Transmission Method).

1.2 The density, in mass per unit volume of the material under test, is determined by comparing the detected rate of gamma emissions with previously established calibration data.

1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

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 warning statements see Section 6 and Note 4.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials

D1188 Test Method for Bulk Specific Gravity and Density of Compacted Bituminous Mixtures Using Coated Samples

D1559 Test Method for Resistance to Plastic Flow of Bituminous Mixtures Using Marshall Apparatus

D2041 Test Method for Theoretical Maximum Specific Gravity and Density of Bituminous Paving Mixtures

D2726 Test Method for Bulk Specific Gravity and Density of Non-Absorptive Compacted Bituminous Mixtures

D3665 Practice for Random Sampling of Construction Materials


Keywords

bituminous-concrete density; density; in-place density; nuclear test method; Concrete; Density--paving materials; Gamma radiation--soil/rock; Neutron radiation--concrete; Nuclear methods;


ICS Code

ICS Number Code 93.080.10 (Road construction); 93.080.20 (Road construction materials)


DOI: 10.1520/D2950_D2950M-11

ASTM International is a member of CrossRef.

ASTM D2950 / D2950M

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ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.