ASTM D6307-04

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Designation:D6307–04
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 D 6307; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope internal, automated weighing system. Test Method B is in-
tended for furnaces without an internal weighing system.
1.1 This test method covers the determination of asphalt
content of hot-mix asphalt (HMA) paving mixtures and pave-
4. Significance and Use
ment samples by removing the asphalt cement at 540°C by
4.1 This test method can be used for quantitative determi-
ignition in a furnace.
nation of asphalt content in HMA paving mixtures and pave-
NOTE 1—Aggregate obtained by this test method may be used for sieve
ment samples for quality control, specification acceptance, and
analysis. Particle size degradation may occur with some aggregates.
mixture evaluation studies. This test method does not require
1.2 This standard does not purport to address all of the
the use of solvents.
safety concerns, if any, associated with its use. It is the
5. Apparatus
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 5.1 Balance,readableto0.1g,andcapableofmeasuringthe
bility of regulatory limitation prior to use.
mass of sample, sample trays, and catch pan.The balance shall
be in accordance with Guide D 4753, Class GP2.
2. Referenced Documents
5.2 Sample Tray(s), of appropriate size that allows the
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2.1 ASTM Standards:
samples to be spread thinly and allows air to flow up through
C 670 Practice for Preparing Precision and Bias Statements
and around the sample particles. The sample shall be enclosed
for Test Methods for Construction Materials
completely with screen mesh, perforated stainless steel plate,
C 702 Practice for Reducing Samples of Aggregate to
or other suitable material.
Testing Size
NOTE 2—Screen mesh or other suitable material with maximum and
D 75 Practice for Sampling Aggregates
minimum openings of 3.35 mm and 600 µm, respectively, has been found
D 140 Practice for Sampling Bituminous Materials
to perform well.
D 979 Practice for Sampling Bituminous Paving Mixtures
5.3 Catch Pan, of appropriate size to hold the sample trays
D 1461 Test Method for Moisture or Volatile Distillates in
so that aggregate particles and melting asphalt binder falling
Bituminous Paving Mixtures
through the screen mesh are caught.
D 4753 Guide for Evaluating, Selecting, and Specifying
5.4 CatchPan/SampleTray(s)HandlingApparatus,suitable
Balances and Standard Masses for Use in Soil, Rock, and
for inserting catch pan and sample tray(s) into furnace and
Construction Materials Testing
removing hot catch pan and sample tray(s) from furnace.
5.5 Assorted Spatulas, Pans, Bowls, and Wire Brushes, for
3. Summary of Test Methods
preparingHMAmixturesandremovingaggregatefromsample
3.1 The asphalt cement in the paving mixture is ignited
tray(s) and catch pan.
using the furnace equipment applicable to the particular
5.6 Protective Gloves, well insulated and capable of with-
method. The asphalt content is calculated by difference from
standing 580°C.
the mass of the residual aggregate and moisture content. The
5.7 Ovens—Mechanical ovens, convection or forced draft,
asphalt content is expressed as mass percent of moisture-free
shall be provided for drying aggregates and HMA mixtures,
mixtures. Test Method A is intended for furnaces with an
and for preheating HMA mixtures prior to ignition testing.
5.8 Ignition Furnace, as described in 8.1.1 or 11.1.1.
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This test method is under the jurisdiction of ASTM Committee D04 on Road
6. Hazards
and Paving Materials and is the direct responsibility of Subcommittee D04.25 on
Analysis of Bituminous Mixtures.
6.1 The temperature of the furnace, sample, sample tray(s),
Current edition approved Aug. 1, 2004. Published August 2004. Originally
andcatchpanafterremovalfromthefurnaceisextremelyhigh.
approved in 1998. Last previous edition approved in 1998 as D 6307 - 98.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or Caution, therefore, must be exercised at all times when
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handling these items as failure to do so could result in serious
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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D6307–04
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