ASTM D6307-05

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Designation:D6307–05
Standard Test Method for
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Asphalt Content of Hot-Mix Asphalt by Ignition Method
This standard is issued under the fixed designation D6307; 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 method. The asphalt content is calculated by difference from
the mass of the residual aggregate and moisture content. The
1.1 This test method covers the determination of asphalt
asphalt content is expressed as mass percent of moisture-free
content of hot-mix asphalt (HMA) paving mixtures and pave-
mixtures. Test Method A is intended for furnaces with an
ment samples by removing the asphalt cement in an ignition
internal, automated weighing system. Test Method B is in-
furnace. The means of sample heating may be the convection
tended for furnaces without an internal weighing system.
method or direct irradiation method.
NOTE 1—Aggregate obtained by this test method may be used for sieve 4. Significance and Use
analysis. Particle size degradation may occur with some aggregates.
4.1 This test method can be used for quantitative determi-
1.2 This standard does not purport to address all of the
nation of asphalt content in HMA paving mixtures and pave-
safety concerns, if any, associated with its use. It is the
ment samples for quality control, specification acceptance, and
responsibility of the user of this standard to establish appro-
mixture evaluation studies. This test method does not require
priate safety and health practices and determine the applica-
the use of solvents. Aggregate obtained by this test method
bility of regulatory limitation prior to use.
may be used for gradation analysis according to Test Method
D5444.
2. Referenced Documents
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5. Apparatus
2.1 ASTM Standards:
C670 Practice for Preparing Precision and Bias Statements
5.1 Balance,readableto0.1g,andcapableofmeasuringthe
for Test Methods for Construction Materials
mass of sample, sample trays, and catch pan.The balance shall
C702 Practice for Reducing Samples of Aggregate to Test-
be in accordance with Guide D4753, Class GP2.
ing Size
5.2 Sample Tray(s), of appropriate size that allows the
D75 Practice for Sampling Aggregates
samples to be spread thinly and allows air to flow up through
D140 Practice for Sampling Bituminous Materials
and around the sample particles. The sample shall be enclosed
D979 Practice for Sampling Bituminous Paving Mixtures
completely with screen mesh, perforated stainless steel plate,
D1461 Test Method for Moisture or Volatile Distillates in
or other suitable material.
Bituminous Paving Mixtures
NOTE 2—Screen mesh or other suitable material with maximum and
D4753 Guide for Evaluating, Selecting, and Specifying
minimum openings of 3.35 mm and 600 µm, respectively, has been found
Balances and Standard Masses for Use in Soil, Rock, and
to perform well.
Construction Materials Testing
5.3 Catch Pan, of appropriate size to hold the sample trays
D5444 Test Method for Mechanical Size Analysis of Ex-
so that aggregate particles and melting asphalt binder falling
tracted Aggregate
through the screen mesh are caught.
5.4 CatchPan/SampleTray(s)HandlingApparatus,suitable
3. Summary of Test Methods
for inserting catch pan and sample tray(s) into furnace and
3.1 The asphalt cement in the paving mixture is ignited
removing hot catch pan and sample tray(s) from furnace.
using the furnace equipment applicable to the particular
5.5 Assorted Spatulas, Pans, Bowls, and Wire Brushes, for
preparingHMAmixturesandremovingaggregatefromsample
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This test method is under the jurisdiction of ASTM Committee D04 on Road
tray(s) and catch pan.
and Paving Materials and is the direct responsibility of Subcommittee D04.25 on
5.6 Protective Gloves, well insulated and capable of with-
Analysis of Bituminous Mixtures.
standing 580°C.
CurrenteditionapprovedJune1,2005.PublishedJuly2005.Originallyapproved
5.7 Ovens—Mechanical ovens, convection or forced draft,
in 1998. Last previous edition approved in 2004 as D6307 – 04. DOI: 10.1520/
D6307-05.
shall be provided for drying aggregates and HMA mixtures,
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
and for preheating HMA mixtures prior to ignition testing.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.8 Ignition Furnace, as described in 8.1.1 or 11.1.1.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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D6307
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