ASTM D8078-18e1

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.
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Designation:D8078 −18
Standard Test Method for
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Ash Content of Asphalt and Emulsified Asphalt Residues
This standard is issued under the fixed designation D8078; 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.
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ε NOTE—Added research report footnote to Section 8 editorially in September 2019.
1. Scope E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
1.1 This test method measures the ash content of an asphalt
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2.2 AASHTO Standard:
or emulsified asphalt residue.
AASHTOR78 RecoveringResiduefromEmulsifiedAsphalt
1.2 The values stated in SI units are to be regarded as
using Low-Temperature Evaporative Techniques
standard. No other units of measurement are included in this
standard.
3. Summary of Test Method
1.3 The text of this standard references notes and footnotes
3.1 A known amount of asphalt or emulsified asphalt
which provide explanatory material. These notes and footnotes
residue is put into a crucible, which is then placed into a muffle
(excluding those in tables and figures) shall not be considered
furnace for a period of time to incinerate any organic materials
as requirements of the standard.
present and allow gravimetric calculation of the ash content of
the specimen.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Significance and Use
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
4.1 Thistestisusedfordeterminingtheamountofinorganic
mine the applicability of regulatory limitations prior to use.
or non-organic materials in an asphalt or emulsified asphalt
1.5 This international standard was developed in accor-
residue. The emulsified asphalt residue can be obtained by
dance with internationally recognized principles on standard-
methods such as Test Methods D6934 and D6997, Practice
ization established in the Decision on Principles for the
D7497, AASHTO R78, or other agency-specified methods.
Development of International Standards, Guides and Recom-
Thistestmaybeusefulasanalternativetosolubilitytestswhen
mendations issued by the World Trade Organization Technical
a confounding material creates an interference to the solubility
Barriers to Trade (TBT) Committee.
test being performed acceptably. An example of an interfering
material is a polymer which may be incompatible with the
2. Referenced Documents
solubility test solvent and plug the filter.
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2.1 ASTM Standards:
NOTE 1—The quality of the results produced by this standard are
D3666 Specification for Minimum Requirements for Agen-
dependent on the competence of the personnel performing the procedure
and the capability, calibration, and maintenance of the equipment used.
cies Testing and Inspecting Road and Paving Materials
Agencies that meet the criteria of Specification D3666 are generally
D6934 Test Method for Residue by Evaporation of Emulsi-
considered capable of competent and objective testing, sampling,
fied Asphalt
inspection, etc. Users of this standard are cautioned that compliance with
D6997 Test Method for Distillation of Emulsified Asphalt
Specification D3666 alone does not completely ensure reliable results.
D7497 Practice for Recovering Residue from Emulsified Reliable results depend on many factors; following the suggestions of
Specification D3666 or some similar acceptable guideline provides a
Asphalt Using Low Temperature Evaporative Technique
means of evaluating and controlling some of those factors.
5. Apparatus
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This test method is under the jurisdiction of ASTM Committee D04 on Road
and Paving Materials and is the direct responsibility of Subcommittee D04.47 on 5.1 Crucible—Porcelain or quartz-fiber, of sufficient size
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Miscellaneous Asphalt Tests.
(normally 30 to 100-cm capacity) and suitability for muffle
Current edition approved April 1, 2018. Published April 2018. Originally
furnace, may be used.
approved in 2016. Last previous edition approved in 2016 as D8078 – 16. DOI:
10.1520/D8078-18E01.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from American Association of State Highway and Transportation
Standards volume information, refer to the standard’s Document Summary page on Officials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,
the ASTM w
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