EFFECTS OF THERMAL SHOCK ON THE DURABILITY OF ASPHALT COATINGS UNDER ACCELERATED TEST

THREE ASPHALTS REPRESENTATIVE OF THE MAJOR SOURCES OF COATING ASPHALT USED IN THE MANUFACTURE OF PREPARED ROOFINGS IN THE UNITED STATES WERE EXPOSED WITHOUT STABILIZER AND WITH 30 PERCENT AND 60 PERCENT OF TWO MINERAL STABILIZERS TO ACCELERATED DURABILITY TESTS. FOUR PANELS OF EACH COATING WERE SUBJECTED DAILY TO 21 HOURS OF EXPOSURE TO THE RADIATION FROM AN ENCLOSED, LOW-INTENSITY CARBON ARC, WITH THE INTRODUCTION OF A CHILLED WATER SPRAY (40 F) FOR 3 MINUTES EVERY 20 MINUTES (17-3 CYCLE). TWO OF THE FOUR PANELS WITH EACH COATING WERE ALSO EXPOSED TO AIR AT -5 F FOR 2 HOURS DAILY. THE USE OF THE 40 F WATER PRODUCED RESULTS EQUIVALENT TO THOSE OBTAINED WHEN BOTH THE 40 F WATER AND EXPOSURE TO AIR AT -5 F WERE EMPLOYED. EXPOSURE TO AIR AT -5 DEGREES F HAS NO SIGNIFICANT EFFECT ON THE DURABILITY OR FAILURE PATTERN OF BOTH STABILIZED AND UNSTABILIZED ASPHALTS UNDER ACCELERATED TEST IF THE TEST INCLUDES FREQUENT CYCLIC THERMAL SHOCKS.

  • Supplemental Notes:
    • Bull No 193, P 46
  • Corporate Authors:

    American Society for Testing and Materials

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  United States  19428-2957
  • Authors:
    • Greenfeld, S H
  • Publication Date: 1953-10

Subject/Index Terms

Filing Info

  • Accession Number: 00210946
  • Record Type: Publication
  • Source Agency: Highway Research Board Bibliography
  • Files: TRIS
  • Created Date: Jun 10 1994 12:00AM