RESEARCH PAYS OFF: ASPHALT CONTENT TEST OFFERS IMPROVEMENT OVER SOLVENTS
The National Center for Asphalt Technology (NCAT) has developed a test method to determine the asphalt content of hot-mix asphalt (HMA) mixtures by ignition. The test method is based on research started in 1990 at NCAT and sponsored by the Federal Highway Administration, the Alabama Department of Transportation, the National Asphalt Pavement Association (NAPA), and the NAPA Research and Education Foundation. In the NCAT ignition method (finalized in 1994), about 1200 grams of HMA mixture is subjected to an elevated temperature of 538 deg C (1,000 deg F) in a furnace to ignite and burn the asphalt cement. NCAT's work has resulted in a test procedure and equipment that automatically measures the asphalt content in 30 to 40 minutes. The grading of the aggregate can then be determined using standard sieve analysis. Larger HMA samples (2400 grams) can also be tested. Use of the NCAT asphalt content test will provide health and environmental benefits, cost savings, shorter test times, and more accurate test results.
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Supplemental Notes:
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 - Publication Date: 1995-9
Language
- English
Media Info
- Features: Tables;
- Pagination: p. 40-41
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Serial:
- TR News
- Issue Number: 180
- Publisher: Transportation Research Board
- ISSN: 0738-6826
Subject/Index Terms
- TRT Terms: Accuracy; Asphalt content; Benefits; Cost control; Environmental protection; Hot mix asphalt; Productivity; Test procedures; Testing equipment
- Uncontrolled Terms: Cost savings; Time savings
- Subject Areas: Environment; Highways; Materials; I31: Bituminous Binders and Materials;
Filing Info
- Accession Number: 00713069
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Oct 25 1995 12:00AM