ASTM D979/D979M-22

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of the standard as published by ASTM is to be considered the official document.
Designation: D979/D979M − 15 D979/D979M − 22
Standard Practice for
Sampling Bituminous Paving Asphalt Mixtures
This standard is issued under the fixed designation D979/D979M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This practice covers sampling of bituminous paving asphalt mixtures at points of manufacture, storage, delivery, or in place.
1.2 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-conformancenonconformance with the standard.
1.3 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
D8 Terminology Relating to Materials for Roads and Pavements
D2041D2041/D2041M Test Method for Theoretical Maximum Specific Gravity and Density of Asphalt Mixtures
D2234/D2234M Practice for Collection of a Gross Sample of Coal
D2726D2726/D2726M Test Method for Bulk Specific Gravity and Density of Non-Absorptive Compacted Asphalt Mixtures
D3665 Practice for Random Sampling of Construction Materials
D5361D5361/D5361M Practice for Sampling Compacted Asphalt Mixtures for Laboratory Testing
D5444 Test Method for Mechanical Size Analysis of Extracted Aggregate
D6307 Test Method for Asphalt Content of Asphalt Mixture by Ignition Method
D6925 Test Method for Preparation and Determination of the Relative Density of Asphalt Mix Specimens by Means of the
Superpave Gyratory Compactor
D6926 Practice for Preparation of Asphalt Mixture Specimens Using Marshall Apparatus
D6927 Test Method for Marshall Stability and Flow of Asphalt Mixtures
E105 Guide for Probability Sampling of Materials
E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or
Process
This practice is under the jurisdiction of ASTM Committee D04 on Road and Paving Materials and areis the direct responsibility of Subcommittee D04.30 on Methods
of Sampling.
Current edition approved June 1, 2015Nov. 1, 2022. Published August 2015November 2022. Originally approved in 1948. Last previous edition approved in 20122015
as D979/D979M – 12.D979/D979M – 15. DOI: 10.1520/D0979_D0979M-15.10.1520/D0979_D0979M-22.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
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D979/D979M − 22
E141 Practice for Acceptance of Evidence Based on the Results of Probability Sampling
2.2 AASHTO Standard:
AASHTO R 47 Standard Practice for Reducing Samples of Hot Mix Asphalt (HMA) to Testing Size
3. Terminology
3.1 This standard uses terms as defined by Terminology D8.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 field sample, n—a quantity of the material to be tested of sufficient size to provide an acceptable estimate of the average
quality of a unit.
3.2.2 increment, n—part of a sample.
3.2.3 lot, n—a sizable isolated quantity of bulk material from a single source, assumed to have been produced by the same process
(for example, a day’s production or a specific mass or volume).
3.2.4 test portion, n—a quantity of the material of sufficient size extracted from the larger field sample by a procedure designed
to ensure accurate representation of the field sample, and thus of the unit sampled.
3.2.5 unit, n—a batch or finite subdivision of a lot of bulk material (for example, a truck load or a specific area covered).
4. Significance and Use
4.1 General:
4.1.1 Sampling is equally as important as the testing, and the sampler shall take every precaution to obtain samples that will yield
an acceptable estimate of the nature and conditions of the materials which they represent.
4.1.2 Samples for the development of preliminary data are obtained by the party responsible for the development of the data.
Samples for control of the product at the source of manufacture or storage, or at the site of use, are obtained by the manufacturer,
contractor, or other parties responsible for accomplishing the work. Samples for tests to be used in acceptance or rejection decisions
by the purchaser are obtained by the purchaser or his authorized representative.
4.1.3 This standard shall not be used for the sampling of compacted bituminous paving asphalt mixtures. Practice D5361D5361/
D5361M shall be used.
5. Apparatus
5.1 Container—A bucket, pan, box, or other vessel of a sufficient size to contain the sample.
5.2 Release Agent—A non-sticknonstick product that promotes an easy separation of the bituminous paving asphalt mixture from
the sampling tools without degrading the material being sampled.
5.3 Sampling Tool—A shovel, scoop, or other device used to obtain samples.
5.4 Truck Sampling Device (optional)—A mechanical apparatus that enables the user to retrieve material from the bed of a truck
without standing in the bed of the truck. An example of one type of truck sampling device is shown in Fig. 1.
6. Procedure
6.1 Inspection—The material shall be inspected to determine discernible variations. The seller shall provide equipment needed for
safe and appropriate inspection and sampling.
Available from American Association of State Highway and Transportation Officials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,
http://www.transportation.org.
D979/D979M − 22
FIG. 1 Example of One Type of Truck Sampling Device
6.2 Release Agents—The user and producer of the bituminous paving asphalt mixtures must mutually agree upon the use of a
release agent. If used, the approved release agent shall be lightly applied to the sampling tools and truck sampling device. Diesel
fuel shall not be used.
6.3 Sampling—The procedures for selecting locations or times for sampling are described in Practice D3665.
6.3.1 Sampling from a Conveyor Belt—Stop the conveyor belt. Randomly select at least three areas of approximately equal size
on the belt for sampling. In each of the locations to be sampled, insert templates, the shapeshapes of which conform to the shape
of the belt. From the selected areas obtain approximately equal increments of material which will form a sample whose quantity
equals or exceeds the minimum recommended in 6.4.2. Carefully scoop all material between templates into a suitable container.
6.3.2 Sampling from Truck Transports—By a random method, select the units to be sampled from the production of materials
delivered. Obtain at least three approximately equal increments. Avoid sampling the extreme top surface. Select at random from
the unit being sampled and combine to form a field sample whose quantity equals or exceeds the minimum recommended in 6.4.2.
The sample may be obtained by collecting the increments with a truck sampling device, scoop, or shovel.
NOTE 1—Users should refer to the manufacturer’s instructions to learn how to properly operate and maintain a truck sampling device, if used.
6.3.3 Sampling from the Roadway Prior to Compaction—When only one sample is to be taken, obtain at least three approximately
equal increments, selected at random from the unit being sampled, and combine to form a field sample whose quantity equals or
exceeds the minimum recommended in 6.4.2.
6.3.3.1 When three or more samples are to be taken in order to evaluate a
...