TEST PROJECT CONSTRUCTED UTILIZING THE CONTRACTION JOINT DESIGN

A SLAB DESIGN WAS DEVELOPED TO TEST THE PERFORMANCE OF CONTRACTION JOINTS AND TO CONFINE THE JOINT OPENING TO CONTROLLABLE LIMITS WITHIN WHICH NON-SEALERS WOULD REMAIN EFFECTIVE. A SECTION OF CONCRETE PAVEMENT WAS CONSTRUCTED ON THE WILBUR CROSS HIGHWAY IN VERNON, CONNECTICUT. INTERMEDIATE CONTRACTION JOINTS WITH ROAD TRANSFER PROVISIONS WERE INSTALLED AT 37 FT-4 IN INTERVALS, SIX DIFFERENT TYPES OF LOAD TRANSFER ASSEMBLIES, IN GROUPS OF EIGHT, BEING USED. ALL JOINTS WERE PLUGGED, IN PREPARATION FOR MEAUSREMENT OF JOINT MOVEMENT, TEMPERATURE WELLS WERE INSTALLED AND REFERENCE LINES ESTABLISHED AT THE ENDS OF THE TEST SECTION TO MEASURE LONGITUDINAL END MOVEMENTS. JOINT MOVEMENT MEASUREMENTS TAKEN AT FREQUENT INTERVALS, WITH PARTICULAR EMPHASIS ON TEMPERATURE EXTREMES, INDICATE THAT MOVEMENT IN THE CONTRACTION JOINTS IS NOT UNIFORM EVEN WITHIN THE INDIVIDUAL GROUPS OF LOAD TRANSFER ASSEMBLIES. OBSERVATIONS TO DATE INDICATE THE FOLLOWING: (1) THERE IS NO CERTAINTY OF A UNIFORM SCHEDULE OF VISIBLE CRACKING EVEN WHEN STEEL DIVIDER PLATES ARE USED, (2) EACH SUMMER THERE HAS BEEN AN INCREASE IN THE PERMANENT OPENING OF THE CONTRACTION JOINTS, (3) THE RUBBER ASPHALT JOINT SEAL HAS NOT PERFORMED IN THE SHORTER SLAB LENGTHS AS SATISFACTORILY AS EXPECTED, (4) JOINT FAULTING HAS BEEN SLIGHT, (5) THE END MOVEMENT OF THE 1800 FOOT TEST SECTION DURING PERIODS OF HIGH TEMPERATURE HAS BEEN CONSIDERABLY RESTRAINED WITH THE RESULT THAT COMPRESSIVE STRESSES OF 400 TO 600 PSI MAY BE EXPECTED, (6) THE RUSTING OF THE DOWELS AT THE JOINT OPENINGS HAS BECOME QUITE PRONOUNCED AFTER THREE YEARS AND IS CONCLUDED TO BE A LARGE FACTOR IN THE NON-UNIFORMITY OF JOINT OPENING, AND (7) THERE HAS BEEN NO SIGN OF ANY PHYSICAL DISTRESS IN THE PAVEMENT OF THE TEST SECTION.

Media Info

  • Monograph Title: Concrete pavement test projects in Connecticut and Indiana
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00206981
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Apr 28 1994 12:00AM