NEEDED RESEARCH ON ASPHALTIC ROAD MATERIALS

THE TERM "ASPHALTIC MATERIALS," AS USED IN THIS DISCUSSION, COVERS THE RANGE OF LIQUID, SEMI-SOLID, AND SOLID ASPHALTIC PRODUCTS USED IN ROAD CONSTRUCTION. IN CHEMICAL COMPOSITION, ASPHALTIC MATERIALS ARE VARIED AND COMPLEX AND ALMOST NUMBERLESS VARIETIES MAY RESULT FROM DIFFERENT MATERIALS AND METHODS OF REFINING. SOME TESTS FOR ASPHALTIC MATERIALS ARE INTENDED TO MEASURE CERTAIN QUALITIES DIRECTLY, OTHERS ARE IDENTIFICATION TESTS. FURTHER RESEARCH IS NECESSARY TO DETERMINE IN WHICH CATEGORY SOME TESTS BELONG. INVESTIGATION IS ALSO NEEDED TO DETERMINE IF TESTS INTENDED TO MEASURE QUALITY ACTUALLY DO SO. THERE IS EVIDENCE TO SHOW THAT DUCTILITY TESTS AND TESTS DESIGNED TO CONTROL SUSCEPTIBILITY TO TEMPERATURE CHANGES ARE NOT DIRECTLY RELATED TO SERVICE BEHAVIOR. A HIGH DEGREE OF DURABILITY IS VERY IMPORTANT AND LITTLE CONCERNING THIS QUALITY CAN BE FORETOLD FROM PRESENT TEST METHODS. FURTHER RESEARCH IS NEEDED TO DETERMINE HOW THE CHARACTERISTICS OF THE CRUDE OILS INFLUENCE THE QUALITY OF THE FINISHED PRODUCTS. CLOSELY ALLIED WITH THESE QUESTIONS ARE THE PROBLEMS WHICH ARISE FROM DIFFERENT METHODS OF REFINING. HEATING, MIXING AND PLACING ASPHALTIC MATERIALS ALTER THEIR CHARACTERISTICS. IT IS NECESSARY TO DETERMINE TO WHAT EXTENT SUCH CHANGES MAY BE PERMITTED WITHOUT DAMAGE TO THE QUALITY OF THE FINISHED PRODUCT. IT IS ALSO NECESSARY TO STUDY THE INTER RELATION BETWEEN ASPHALTIC MATERIALS, AND THE AGGREGATES. STUDY IS ALSO NEEDED ON NEW USES FOR BITUMINOUS MATERIALS SUCH AS STABILIZATION OF SOILS. WHEN THE DETAILS OF NEEDED RESEARCH ARE CONSIDERED THE PROBLEM BECOMES ENORMOUSLY COMPLEX. THE COMBINED EFFORTS OF ALL INTERESTED IN THE PRODUCTION AND USE OF THESE MATERIALS ARE REQUIRED IF RESULTS ARE TO BE ACHIEVED IN A REASONABLE LENGTH OF TIME. /AUTHOR/

  • Supplemental Notes:
    • Vol 15, pp 261-272
  • Authors:
    • Kelley, E F
    • Crum, R W
    • Lang, F C
    • Cattell, R A
    • Campbell, L C
    • Boyd, J E
    • Baskin, C M
  • Publication Date: 1936

Media Info

  • Monograph Title: Proceedings of the Fifteenth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 4-6, 1935
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00202857
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jun 11 1971 12:00AM