The Troxler Model 2226 asphalt content gauge was evaluated in the laboratory and taken into the field where its results were compared to conventional reflux values. The precision as evaluated in the laboratory was found to be excellent - equivalent to .06% asphalt content with a 45 second count. The gauge does have to be recalibrated each time a different aggregate is used and as a practical matter should be recalibrated for each different mix type. Sample preparation is important and samples should be as uniform as possible. The accuracy appears to be as good as that of the reflux extractor. A recommendation for using the nuclear gauge is appended.
Several processes have been developed to reduce the mixing and compaction temperatures of hot mix asphalt (HMA) without sacrificing the quality of the...
Mechanistic pavement design procedures based on elastic layer theory require characterization of pavement layer materials including subgrade soil. Thi...
Links with this icon indicate that you are leaving a Bureau of Transportation
Statistics (BTS)/National Transportation Library (NTL)
Web-based service.
Thank you for visiting.
You are about to access a non-government link outside of
the U.S. Department of Transportation's National
Transportation Library.
Please note: While links to Web sites outside of DOT are
offered for your convenience, when you exit DOT Web sites,
Federal privacy policy and Section 508 of the Rehabilitation
Act (accessibility requirements) no longer apply. In
addition, DOT does not attest to the accuracy, relevance,
timeliness or completeness of information provided by linked
sites. Linking to a Web site does not constitute an
endorsement by DOT of the sponsors of the site or the
products presented on the site. For more information, please
view DOT's Web site linking policy.
To get back to the page you were previously viewing, click
your Cancel button.
United States Department of Transportation
[PDF-1.88 MB]
