Center for Transportation Research Report 1367-1
Performance-Based Seal Coat
Asphalt Specifications
By:
William E. Elmore
Chayatan Phromsorn
Mansour Solaimanian
Robert B. McGennis
Thomas W. Kennedy
The Texas Department of Transportation is moving to adopt the
requirements and nomenclature of the asphalt binders developed
for the Strategic Highway Research Program's Superpave design
system for hot-mixed asphalt concrete. Under present specifications,
this would require the Department to maintain, test, and support
two separate specifications for basically the same material, since
the SHRP study did not include asphalt binders used for seal coats.
This study determined that the asphalts presently being used
in Texas can meet the PG, or Superpave, grading system. The findings
were based on official samples of material being used in the Department's
program, though additional work must be accomplished to determine
that these materials are being matched with the locations, environmentally
as well as physically, to yield the most satisfactory product.
Technical questions pertaining to this study should be addressed
to Dr. Mansour Solaimanian at: mansour.sol@mail.utexas.edu.
Those interested in a copy of the report should contact the librarian
at The University of Texas at Austin, Center for Transportation
Research at: ctrlib@uts.cc.utexas.edu.
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