LABORATORY TESTING OF MATERIALS FOR SEALING CRACKS IN BITUMINOUS CONCRETE PAVEMENTS

THE EXPERIMENTAL WORK DESCRIBED WAS PART OF A PROGRAM OF RESEARCH TO FIND A MATERIAL SUITABLE FOR SEALING NARROW REFLECTION CRACKS. ITS OBJECTIVE WAS TO FIND SEALERS THAT WOULD MERIT FURTHER TESTING IN THE FIELD. FIRST OF ALL, CRITERIA WERE ESTABLISHED FOR A SATISFACTORY REFLECTION CRACK SEALER. THESE CAN BE OUTLINED AS FOLLOWS: (1) THE SEALER SHOULD ADHERE FIRMLY TO THE CRACK SURFACES OF THE BITUMINOUS CONCRETE PAVEMENT SO THAT IT WILL REMAIN IN THE OPENING AND SEAL IT EFFECTIVELY UNDER ANY CONDITIONS. (2) IT SHOULD RESIST THE INGRESS OF GRIT AND WARER TO PROTECT THE PAVEMENT AND THE UNDERLYING JOINT FROM PUMPING, SWELLING, RAVELLING, AND FURTHER DETERIORATION. (3) IT SHOULD BE ABLE TO WITHSTAND REPEATED STRETCHING AND COMPRESSION OVER LONG PERIODS (YEARS) WITHOUT FAILING IN COHESION WHEN PLACED IN A CRACK WHICH VARIES FROM 0.125 INCH (1/8 INCH) IN SUMMER TO 0.325 INCH IN WINTER, AN EXTENSION OF 0.2 INCH OR ABOUT 160 PERCENT. (4) IN HOT WEATHER THE SEALER SHOULD NEITHER FLOW OUT OF THE CRACK NOR CHANGE ITS PROPERTIES. (5) THE SEALER MAY BE APPLIED EITHER HOT OR COLD. IF POURED HOT, THE HEATING PROCESS SHOULD NOT PERMANENTLY CHANGE ITS SEALING PROPERTIES. AT HIGH TEMPERATURES HANDLING SHOULD STILL BE SAFE. (6) THE SEALER SHOULD BE EASY TO APPLY INTO THE CRACKS WITH EITHER GRAVITY-FEED POURING OR SIMPLE PUMPING MACHINERY. (7) MINIMUM PREPARATION OF THE CRACK PRIOR TO SEALING IS DESIRABLE. (8) IT SHOULD NOT SHRINK EXCESSIVELY DUE TO COOLING OR EVAPORATION OF SOLVENTS, SO AS TO ELIMINATE THE NEED FOR REPEATED POURING. (9) THE MATERIAL SHOULD BE DURABLE AND SHOULD NEITHER HARDEN NOR SOFTEN WITH AGE. (10) THE SEALER SHOULD NOT EXTRUDE OR BECOME TACKY ON ITS EXPOSED SURFACE DURING HIGH SUMMER TEMPRATURES TO AVOID TRACKING OF THE MATERIAL BY TRAFFIC. (11) IT SHOULD NOT BE TOXIC TO EITHER HUMANS OR ANIMALS. (12) THE COMPOUND SHOULD NOT REACT WITH ASPHALT, SALT, OIL, ETC. (13) IF POSSIBLE, THE COLOR SHOULD NOT CONTRAST UNDULY WITH THE ROAD SURFACE. (14) IT SHOULD BE REASONABLY ECONOMICAL. TESTS WERE SELECTED TO MEET THE REQUIREMENTS OUTLINED. THE FOLLOWING CONCLUSIONS MAY BE DRAWN FROM THE LABORATORY TESTING REPORTED HEREIN: (1) NONE OF THE MATERIALS TESTED THUS FAR HAS PASSED ALL THE TESTS PLANNED TO CORRESPOND IN SEVERITY TO THE DEMANDS PUT ON A SEALER IN A 1/8- INCH REFLECTION CRACK. THE BEST AVAILABLE MATERIALS WERE NOT FLUID ENOUGH TO PLACE IN SUCH A NARROW OPENING. (2) THE PHYSICAL REQUIREMENTS OF A SEALER FOR 1/8-INCH REFLECTION CRACKS ARE SUCH THAT AN ADEQUATE MATERIAL MAY BE DIFFICULT TO DEVELOP. (3) FOUR SEALERS PASSED THE 1/4-INCH, 150 PERCENT BOND- DUCTILITY TESTS, AND SHOWED SATISFACTORY RESULTS IN OTHER TESTS. THESE MATERIALS GIVE PROMISE, THEREFORE, OR PERFORMING WELL IN A 1/4-INCH WIDE REFLECTION CRACK. (4) REFLECTION CRACKS WOULD HAVE TO BE WIDENED TO 1/4-INCH TO USE THESE MATERIALS. /AUTHOR/

  • Supplemental Notes:
    • Vol 25, No 8, PP 19-31, 11 FIG, 1 TAB, 1 APP
  • Authors:
    • Tons, E
    • Roggeveen, V J
  • Publication Date: 1955-9

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  • Accession Number: 00211722
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 29 1972 12:00AM