POLYESTER OVERLAYS FOR ROAD AND BRIDGE PROTECTION AND REPAIRS

SEALING OF DETERIORATED CONCRETE SURFACES AND THE PROVISION OF A NEW, DURABLE WEAR SURFACE CANNOT READILY BE ACCOMPLISHED THROUGH THE USE OF CONVENTIONAL PAVING MATERIALS, SUCH AS CONCRETE OR ASPHALTIC-CONCRETE. VARIOUS SYNTHETIC RESIN SYSTEMS HAVE BEEN EVALUATED AS SEALERS AND AS BINDERS FOR WEAR COURSES IN ATTEMPTING TO RESOLVE THE PROBLEM. EPOXY RESIN SYSTEMS HAVE BEEN WIDELY INVESTIGATED AND HAVE THE LONGEST HISTORY OF SATISFACTORY USE. THIS PAPER DESCRIBES THE PERFORMANCE OF A SYSTEM BASED ON POLYESTER RESINS, OVER A WIDE VARIETY OF EXPOSURES AND USE CONDITIONS. THE POLYESTER SYSTEM IS BASICALLY QUITE SIMPLE AND VERSATILE, INVOLVING APPLICATION OF A CATALYZED RESIN TO A CLEAN, DRY, SAND-BLASTED ROAD SURFACE AT A RATE OF 3 LB/SQ YD. CLEAN, DRY ROUND-GRAIN SILICA IS BROADCAST IN EXCESS ONTO THE WET RESIN. AFTER THE RESIN HAS CURED IN 30 TO 60 MIN. THE EXCESS SAND IS BRUSHED OFF. THREE SUCH COATS ARE GENERALLY RECOMMENDED, GIVING A FINAL THICKNESS OF AT LEAST 1/4 IN. THE SYSTEM CURES RAPIDLY OVER A VARIETY OF TEMPERATURE CONDITIONS, 40 TO 110 F, SO THAT TRAFFIC CAN BE ALLOWED OVER THE SURFACE WITHIN AN HOUR AFTER APPLICATION. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: References; Tables;
  • Pagination: pp 36-40
  • Monograph Title: Paints, metals, joints and polyester overlays
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00218422
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Dec 9 1994 12:00AM