This method is widely preferred over older solvent-extraction methods (like ASTM D2172) because it is faster, more environmentally friendly (no hazardous solvents), and highly accurate when properly calibrated.
| Standard Version | Status | Description / Key Notes | | :--- | :--- | :--- | | | Active (Current) | Latest edition | | ASTM D6307-16 | Historical (Superseded) | Replaced by the 2019 version | | ASTM D6307-10 | Historical (Superseded) | Tested HMA mixtures | | ASTM D6307-05 | Historical (Superseded) | An earlier version of the standard | | ASTM D6307-98 | Historical (An important prior version) | Standardized testing with 540°C ignition |
The sample is placed evenly into the nested sample baskets, weighed, and the initial mass is recorded. Ignition/Burn Cycle:
Yes, but with caution. The ignition method burns off the aged binder in RAP as well as the virgin binder. The standard requires that you account for the residual binder content of the RAP through a separate extraction or ignition test on the RAP alone.
It eliminates the need for hazardous, flammable, or toxic solvents like trichloroethylene or methylene chloride. astm d6307 pdf
: It eliminates the need for hazardous solvents and allows the recovered aggregate to be reused for gradation analysis (per ASTM D5444). The Ignition Test Procedure
ASTM D6307 has undergone several revisions over the years, with the most recent edition identified by the suffix number (e.g., ASTM D6307-19). The current active version of the standard is , which was published on February 1, 2019 . The standard is a concise document, spanning just 5 pages .
Defines what the test method covers and specifies that it is not suitable for asphalt mixtures containing large amounts of hydrated lime or other materials that decompose during ignition.
This article is for informational purposes only. Always refer to the official ASTM International website (www.astm.org) for the most current version of any standard, pricing, and licensing information. The ignition method burns off the aged binder
: Once the asphalt is burned off, the remaining heated aggregate can often be used for sieve analysis (ASTM C136) to check the gradation of the mix.
A: The standard specifically notes that . In such cases, the standard suggests that the user should be aware of this possibility and take it into account when interpreting the results.
If the sample contains moisture, it must be dried to a constant mass or a separate moisture correction factor must be calculated.
Technicians mix a known "blank" sample of aggregate and binder in the lab. The sample is burned in the furnace. : It eliminates the need for hazardous solvents
To successfully execute this test according to the standard, laboratories must be equipped with specific instruments:
: Formulas to determine the asphalt binder content, including corrections for aggregate mass loss (calibration factor). Key Technical Details Standard Units : The standard uses SI units as the primary measurement Aggregate Recovery
: Place the sample in the furnace. The binder is ignited and burned away.
The furnace monitors the weight loss. The test automatically concludes when the change in mass drops below a specific threshold (typically 0.01% for three consecutive minutes).
