ASTM D8078-16

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D8078 −16
Standard Test Method for
1
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.
1. Scope furnace for a period of time to incinerate any organic materials
present and allow gravimetric calculation of the ash content of
1.1 This test method measures the ash content of an asphalt
the specimen.
or emulsified asphalt residue.
1.2 A precision and bias statement for this standard has not
4. Significance and Use
beendevelopedatthistime.Therefore,thisstandardshouldnot
4.1 Thistestisusedfordeterminingtheamountofinorganic
be used for acceptance or rejection of a material for purchasing
or non-organic materials in an asphalt or emulsified asphalt
purposes.
residue. The emulsified asphalt residue can be obtained by
1.3 The values stated in SI units are to be regarded as
methods such as Test Methods D6934 and D6997, Practice
standard. No other units of measurement are included in this
D7497, AASHTO PP72, or other agency specified methods.
standard.
Thistestmaybeusefulasanalternativetosolubilitytestswhen
1.4 This standard does not purport to address all of the a confounding material creates an interference to the solubility
safety concerns, if any, associated with its use. It is the test being performed acceptably. An example of an interfering
responsibility of the user of this standard to establish appro- material is a polymer which may be incompatible with the
priate safety and health practices and determine the applica- solubility test solvent and plugs the filter.
bility of regulatory limitations prior to use.
5. Apparatus
2. Referenced Documents
5.1 Crucible—Porcelain or quartz-fiber of sufficient size
3
2
(normally 30 to 100 cm capacity) and suitability for muffle
2.1 ASTM Standards:
furnace, may be used.
D6934 Test Method for Residue by Evaporation of Emulsi-
fied Asphalt
5.2 Crucible Tongs—Sufficient size to transfer the crucible
D6997 Test Method for Distillation of Emulsified Asphalt
to and from the muffle furnace safely.
D7497 Practice for Recovering Residue from Emulsified
5.3 Balance, capable of weighing a minimum of 200 g to
Asphalt Using Low Temperature Evaporative Technique
within 0.001 g.
3
2.2 AASHTO Standard:
5.4 Muffle Furnace—Electric resistance heated or micro-
AASHTO PP72 Recovering Residue from Emulsified As-
wave heated furnace, capable of maintaining a temperature of
phalt using Low-Temperature Evaporative Techniques
900 6 25°C.
3. Summary of Test Method 5.5 Desiccator, of suitable size to hold the crucibles during
the cooling process.
3.1 A known amount of asphalt or emulsified asphalt
residue is put into a crucible, which is then placed into a muffle
6. Procedure
6.1 Preheat the muffle furnace to a temperature of 600°C
(610°C) prior to moving on to the next step in the procedure.
1
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
6.2 Heat an empty crucible at 600°C (610°C) for 10 to 15
Miscellaneous Asphalt Tests.
min. Cool the crucible to room temperature in the desiccator.
Current edition approved Oct. 1, 2016. Published October 2016. DOI: 10.1520/
D8078-16.
6.3 Place the empty crucible on the balance and record the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
weight (W ) to the nearest 0.001 g. Tare the balance prior to
c
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
placing the sample in the crucible.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
6.4 Place approximately 2 to3gofthe emulsified asphalt
3
Available from American Association of State Highway and Transportation
residue or asphalt to be tested into the crucible and record the
Officials (AASHTO), 444 N. Capitol St., NW, Suite 249, Washington, DC 20001,
http://www.transportation.org. sample weight (W ) to the nearest 0.001 g. If the sample is hot
s
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D8078−16
when put into the crucible, place the crucible with the sample 7. Calculation
into the desiccator to cool for 15 min prior to recording the
7.1 This equation is used to determine the percent ash
sample weight (W ) to the nearest 0.001 g.
s
content (A ) from the asphalt or emulsified asphalt residue
c
sample. The ash content is calculated as follows:
NOTE 1—A pre-ashing proce
...