ASTM D6704-22

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of the standard as published by ASTM is to be considered the official document.
Designation: D6704 − 08 (Reapproved 2015) D6704 − 22
Standard Test Method for
Determining the Workability of Asphalt Cold Mix Patching
Material
This standard is issued under the fixed designation D6704; 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.
1. Scope
1.1 This test method provides a procedure for determination of the workability of asphalt cold mix patching materials.
1.2 This test method is applicable to asphalt cold mix patching materials that will be stockpiled or packaged in containers,
subjected to different climatic conditions, and later used for roadway patching operations.
1.3 The within-laboratory repeatability standard deviation has been determined to be 10 % based on one lab, three test replicates,
and two different samples. The between-laboratory reproducibility of this test method is being determined and will be available
on or before August 2013. Therefore, this test method should not be used for purchasing purposes.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the standard.
1.6 This procedure may involve hazardous materials, operations, and equipment. 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. This
procedure may involve hazardous materials, operations, and equipment.
1.7 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:
C702C702/C702M Practice for Reducing Samples of Aggregate to Testing Size
D8 Terminology Relating to Materials for Roads and Pavements
D75D75/D75M Practice for Sampling Aggregates
D3665 Practice for Random Sampling of Construction Materials
D3666 Specification for Minimum Requirements for Agencies Testing and Inspecting Road and Paving Materials
This test method is under the jurisdiction of ASTM Committee D04 on Road and Paving Materials and is the direct responsibility of Subcommittee D04.27 on Cold Mix
Asphalts.
Current edition approved June 1, 2015May 1, 2022. Published July 2015May 2022. Originally approved in 2001. Last previous edition approved in 20082015 as
D6704 – 08.D6704 – 08 (2015). DOI: 10.1520/D6704-08R15.10.1520/D6704-22.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6704 − 22
D4753 Guide for Evaluating, Selecting, and Specifying Balances and Standard Masses for Use in Soil, Rock, and Construction
Materials Testing
D5581 Test Method for Resistance to Plastic Flow of Bituminous Mixtures Using Marshall Apparatus (6 in. Diameter Specimen)
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 workability—the average maximum resistance to penetration by a designated penetrometer into a compacted asphalt cold
mix that is confined in a designated box.
3.2 Definitions for other terms used in this test method may be found in Terminology D8 or a standard unabridged dictionary.
4. Summary of Test Method
4.1 This test method is used to determine the relative value for workability of an asphalt cold mix patching material to be used
under different climatic conditions.
4.2 Cold patching samples are obtained from the asphalt cold mix stockpile or removed from its container, cooled to a specified
temperature, and measured for workability.
5. Significance and Use
5.1 This test method may be used to generate information concerning the potential characteristics of handling, placing,
compaction, and performance of an asphalt cold mix.
5.2 Workability is one of the main factors that influences the suitability and ultimately the performance of asphalt cold mix
suitability for use as a roadway patching material.
5.3 This test method is applicable to asphalt cold mixes manufactured with modified or unmodified asphalt emulsions,emulsified
asphalts, cutback asphalts, or combinations thereof.
NOTE 1—The quality of the results produced by this standard are dependent on the competence of the personnel performing the procedure and the
capability, calibration, and maintenance of the equipment used. Agencies that meet the criteria of Specification D3666 are generally considered capable
of competent and objective testing, sampling, inspection, etc. Users of this standard are cautioned that compliance with Specification D3666 alone does
not completely ensure reliable results. Reliable results depend on many factors; following the suggestions of Specification D3666 or some similar
acceptable guideline provides a means of evaluating and controlling some of those factors.
6. Interferences
6.1 Differences in the aggregate gradation, size, shape, and surface properties, and the residual asphalt binder can significantly
affect the workability test method values.
6.2 Procedure variances can affect the values obtained. Careful adherence to this test method will decrease the likelihood of
differences caused by departures from procedure parameters.
7. Apparatus
7.1 Freezer, capable of maintaining a temperature of –10 6 1°C.1 °C.
7.2 Balance, conforming to the requirements of SpecificationGuide D4753, Class GP5.
7.3 Boxes, three square workability boxes or other similar molds, constructed to measure 165 by 165 by 50-mm 50 mm deep inside
dimensions and sufficiently rigid for forming and measuring the asphalt cold mix specimens (Fig. 1).
7.4 Compaction Hammer, as specified in Test Method D5581 with a flat tamping foot (Fig. 2) of 150 by 150 by 6-mm 6 mm thick
attached to the bottom of the hammer and a 4536-g 4536 g sliding weight with a free fall of 457.2 mm.
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