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Historically, the most common method for determining asphalt content was extraction using different methods and solvents such as trichloroethylene, methylene chloride, or n-propyl bromide. In the 1980s, the use of chlorinated solvents for asphalt extractions began to be questioned because of potential health and safety impacts and disposal difficulties.

NCHRP Research Report 1060: Ignition Furnace Correction Factors: Identifying Influences and Minimizing Variability, from TRB's National Cooperative Highway Research Program, finds that reducing testing temperature results in lower correction factors for most asphalt mixes included in the evaluation. The study provides a precision statement that may be of particular interest to agencies dealing with mixes containing high recycled content materials and aggregates with high loss mass during ignition testing.

Suggested Citation

National Academies of Sciences, Engineering, and Medicine. 2023. Ignition Furnace Correction Factors: Identifying Influences and Minimizing Variability. Washington, DC: The National Academies Press. https://doi.org/10.17226/27030.

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Publication Info

52 pages |  8.5 x 11 |  DOI: https://doi.org/10.17226/27030

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