REPORT ON THE PHYSICAL AND CHEMICAL PROPERTIES OF PETROLEUM ASPHALTS OF THE 50-60 AND 85-100 PENETRATION GRADES

STANDARD SPECIFICATIONS THAT WERE THOUGHT TO CONTROL ADEQUATELY THE QUALITY AND SERVICEABILITY OF EARLIER ASPHALT CEMENTS PRODUCED FROM RELATIVELY FEW BASE PETROLEUMS AND BY REFINING PROCESSES THAT WERE PRACTICALLY STANDARD HAVE BEEN SUBJECTED TO CONSIDERABLE QUESTIONING SINCE THE ADVENT OF MATERIALS PRODUCED FROM DIFFERENT BASE PETROLEUMS AND WITH NEWER REFINING PROCESSES. AS A RESULT, THERE HAVE BEEN CHANGES IN SPECIFICATION REQUIREMENTS BY THE RESURRECTION OF OLD TESTS, OR THE DEVELOPMENT OF NEW TESTS IN AN EFFORT TO SECURE MORE SATISFACTORY AND MORE DURABLE MATERIALS. SAMPLES OF ASPHALTS OF THE 50-60 AND 85-100 PENETRATION GRADES FROM THE LEADING PRODUCERS WERE EXAMINED AND FOUND TO PASS, EXCEPT FOR SLIGHT DEVIATIONS, THE SPECIFICATIONS THAT HAVE GENERALLY BEEN CONSIDERED STANDARD. HOWEVER, MANY OF THE ASPHALTS FROM SOURCES THAT WERE THOUGH TO BE SATISFACTORY FAILED TO PASS MANY OF THE SPECIAL REQUIREMENTS.

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  • Supplemental Notes:
    • Vol 11, P 86
  • Authors:
    • Lewis, R H
    • Welborn, J Y
  • Publication Date: 1940-3

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  • Accession Number: 00210940
  • Record Type: Publication
  • Source Agency: Highway Research Board Bibliography
  • Files: TRIS
  • Created Date: Jun 3 1994 12:00AM