An examination of existing binder systems showed that little possibility existed for the development of a completely new binder system, and the most probable new binder for substantial use appeared to be sulfur. The necessity is noted for consideration of cost and energy effectiveness of trade-offs among possible alternaties, and for the establishment of universitally acceptable energy use factors. The workshop made the following recommendations; optimize design; eliminate artifical restraints; use emulsions instead of cutbacks for tack coats; evaluate practices for crack sealing; design asphalt mixtures to use less asphalt per volume unit of construction; design portland cement concrete (PCC) to meet the needs; Use fly ash or other available pozzolans in PCC. Innovative techniques were also suggested which included the use of recycling (asphalt in old pavement) procedures, and the use of special water reducing agents in PCC. Combinations of stabilizing materials is recommended for improved performance. The need is indicated for research in the use of emulsions, sulfur and sulfur-asphalt systems, reinforcing additives for asphalt, prime coats, and the performance of PCC pavements. Careful systems analysis is essential in the evaluation of cost of energy-use effectivess to identify areas of promising payoff.

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    • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved. Sponsored by the Federal Highway Administration of the U.S. Department of Transportation, the Federal Energy Administration, and the Energy Research and Development Administration.
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  • Authors:
    • Halstead, Woodrow J
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  • Publication Date: 1976

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  • Media Type: Digital/other
  • Pagination: pp 34-38
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  • Accession Number: 00149913
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Apr 13 1977 12:00AM