ASTM D6936-23

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.
Designation: D6936 − 23
Standard Test Method for
1
Determining Demulsibility of Emulsified Asphalt
This standard is issued under the fixed designation D6936; 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 3. Significance and Use
1.1 This test method, applicable to both anionic and cationic 3.1 This test method is used to identify or classify an
emulsified asphalts of the RS and MS type, measures the emulsified asphalt as an RS or MS by measuring the amount of
chemical breaking of the emulsified asphalt. available asphalt that is broken from the emulsified asphalt by
utilizing specified amounts and concentrations of calcium
1.2 The values stated in SI units are to be regarded as
chloride solution for anionic emulsified asphalts and dioctyl
standard. No other units of measurement are included in this
sodium sulfosuccinate for cationic emulsified asphalts.
standard.
NOTE 1—The quality of the results produced by this standard are
1.3 The text of this standard references notes and footnotes
dependent on the competence of the personnel performing the procedure
which provide explanatory material. These notes and footnotes
and the capability, calibration, and maintenance of the equipment used.
(excluding those in tables and figures) shall not be considered
Agencies that meet the criteria of Specification D3666 are generally
as requirements of the standard. considered capable of competent and objective testing, sampling,
inspection, etc. Users of this standard are cautioned that compliance with
1.4 This standard does not purport to address all of the
Specification D3666 alone does not completely ensure reliable results.
safety concerns, if any, associated with its use. It is the
Reliable results depend on many factors; following the suggestions of
responsibility of the user of this standard to establish appro-
Specification D3666 or some similar acceptable guideline provides a
means of evaluating and controlling some of those factors.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
4. Sample Conditioning for Testing
1.5 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4.1 All emulsified asphalts shall be properly stirred to
ization established in the Decision on Principles for the achieve homogeneity before testing.
Development of International Standards, Guides and Recom-
4.1.1 All emulsified asphalts with viscosity testing require-
mendations issued by the World Trade Organization Technical ments of 50 °C shall be heated to 50 6 3 °C in the original
Barriers to Trade (TBT) Committee.
sample container in a water bath or oven. The container should
be vented to relieve pressure. After the sample reaches 50 6
2. Referenced Documents
3 °C, stir the sample to achieve homogeneity.
2
4.1.2 Emulsified asphalts with viscosity testing require-
2.1 ASTM Standards:
ments of 25 °C should be stirred until the emulsion reaches 25
D511 Test Methods for Calcium and Magnesium In Water
6 1 °C in the original sample container to achieve homogene-
D3666 Specification for Minimum Requirements for Agen-
ity. The sample container may be heated in a water bath or oven
cies Testing and Inspecting Road and Paving Materials
if the emulsion is below 25 6 1 °C then stirred to achieve
D6934 Test Method for Residue by Evaporation of Emulsi-
homogeneity. If the sample is above 25 6 1 °C, then it may be
fied Asphalt
cooled in a water bath until the emulsion reaches the correct
D6997 Test Method for Distillation of Emulsified Asphalt
temperature then the emulsion is stirred to achieve homogene-
E11 Specification for Woven Wire Test Sieve Cloth and Test
ity.
Sieves
5. Apparatus and Reagents
1
This test method is under the jurisdiction of ASTM Committee D04 on Road
5.1 Wire Cloth—1.40 mm wire cloth that is at least 125 mm
and Paving Materials and is the direct responsibility of Subcommittee D04.42 on
square, unframed, and having wire diameters and openings that
Emulsified Asphalt Test.
Current edition approved Dec. 1, 2023. Published December 2023. Originally conform to Specification E11.
approved in 2004. Last previous edition approved in 2017 as D6936 – 17. DOI:
5.2 Beaker—Metal beaker or other suitable metal container
10.1520/D6936-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or with a minimum 300 mL capacity.
contact ASTM Custo
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