RESEARCH NEEDS RELATING TO PERFORMANCE OF AGGREGATES IN HIGHWAY CONSTRUCTION

WITH THE USE OF CONVENTIONAL DESIGN PROCEDURES, AGGREGATES COMPRISE MORE THAN 90 PERCENT OF THE MATERIAL REQUIRED FOR THE CONSTRUCTION AND MAINTENANCE OF HIGHWAY PAVEMENTS. IN ORDER TO SUMMARIZE THE MOST IMPORTANT RESEARCH PROBLEMS, THE TOP TWO PROJECTS IN EACH OF THE STUDY AREAS ARE AS FOLLOWS: (1) UNDER PORTLAND CEMENT CONCRETE, THE ROLE OF AGGREGATES PARTICLE CHARACTERISTICS AND GRADATIONS ON PROERTIES OF FRESH CONCRETE AND PERFORMANCE OF HARDENED CONCRETE ARE STUDIES, (2) IN RELATION TO BITUMINOUS CONCRETE AND RELATED MATERIALS, THE STRIPPING OF ASPHALT CEMENT IN BITUMINOUS MIXTURES AND IDENTIFICATION OF THE SIGNIFICANT AGGREGATE SURFACE PROPERTIES THAT INFLUENCE COATING AND ADHESION ARE STUDIED AS WELL AS THE SOUNDNESS OF AGGREGATE PARTICLES IN BITUMINOUS MIXTURES, (3) UNDER BASE COURSE AND SHOULDER MATERIALS, THE RELATIONSHIP OF AGGREGATE AND BASE COURSE PERFORMANCE UNDER VARYING TRAFFIC LOADS IS STUDIED AS WELL AS THE DETERMINATION OF THE CAUSES OF CHANGE IN GRADATION FOR AGGREGATES USED IN HIGHWAY BASE COURSE CONSTRUCTION, AND (4) AGGREGATE PROPERTIES ARE RELATED TO SKID RESISTANCE OF PAVEMENTS AND DETERMINATION IS MADE OF THE SURFACE CHARACTERISTICS OF AGGREGATES USED IN HIGHWAY CONSTRUCTION.

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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. 68 PP, 9 TAB, REFS, 3 APP
  • Authors:
    • WALKER, R D
    • Larson, T D
    • Cady, P D
  • Publication Date: 1970

Media Info

  • Media Type: Digital/other
  • Serial:
    • NCHRP Report
    • Issue Number: 100
    • Publisher: Transportation Research Board
    • ISSN: 0077-5614
  • Publication flags:

    Open Access (libre)

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Filing Info

  • Accession Number: 00217845
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Nov 9 1970 12:00AM