USE OF DOW SM-100 LATEX ON MAINE BRIDGE DECKS

IN AUGUST 1959 THE MIDDLE BRIDGE IN DRESDEN WAS REPAIRED BY USING A 1/2" LATEX MORTAR OVERLAY. THE DOW LATEX ADDITIVE, DOW SM-100 (FORMERLY 560), WAS USED IN THE CONSTRUCTION OF CONCRETE CURBS AND A 1 1/4" WEARING SURFACE AT PAYNE ROAD BRIDGE IN SOUTH PORTLAND. THE 3" X 3" X 16", TEST BEAMS AFTER DRY CURING FOR 28 DAYS WERE SUBJECTED TO RAPID FREEZE-THAW I IN A 3% SALT SOLUTION AND AFTER ONLY 30 CYCLES EXHIBITED SEVERE SPALLING. HOWEVER FIELD PERFORMANCE OF SIMILAR MATERIAL CURER FOR 70 TO 90 DAYS WAS EXCELLENT. GREAT WORKS BRIDGE IN BRADLEY WAS ALSO CONSTRUCTED IN 1969 WITH THE SAME ARRANGEMENT AS PAYNE ROAD BRIDGE. RESULTS TO DATE ARE SIMILAR TO PAYNE ROAD BRIDGE. A 1972 FIELD INSPECTION FOUND BOTH AREAS IN GOOD CONDITION. CURING TIME HAS BEEN FOUND TO BE A CRITICAL FACTOR AND SHOULD BE EXTENDED A MINIMUM OF 90 DAYS BEFORE APPLICATION OF DE-ICING CHEMICALS. MAINE SPECIFICATIONS REQUIRE APPLICATION ONLY AT AMBIENT TEMPERATURES BETWEEN 50 DEG F AND 90 DEG F. SKID RESISTANCE MEASUREMENTS WERE TAKEN TWICE YEARLY AT PAYNE ROAD AND GREAT WORKS FOR 1970 AND 1971: SKID NUMBERS DECREASED APPROXIMATELY 5 POINTS OVER A 2 YEAR PERIOD. THERE REMAINS LITTLE DOUBT THAT A LATEX WEARING COURSE IS FAR BETTER THAN STANDARD ASPHALT AND FABRIC MEMBRANE UNDER REGULAR BITUMINOUS CONCRETE MIXES. THE PRINCIPAL PROBLEM IS, CAN IT WITH VOLUME USAGE, BECOME COST COMPETITIVE IN THE LONG RUN WITH A WELL BONDED LINSEED OILED PORTLAND CEMENT CONCRETE WEARING COURSE CONTAINING NEWLY DEVELOPED DURABILITY ENHANCING ADDITIVES? /AUTHOR/

  • Supplemental Notes:
    • TECH PAPER 72-4T
  • Corporate Authors:

    Maine Department of Transportation

    Child House, 16 State House Station
    Augusta, ME  USA  04333-0016
  • Authors:
    • Stevens, E
    • Smith, E V
  • Publication Date: 1972

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 63 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00214184
  • Record Type: Publication
  • Files: TRIS, STATEDOT
  • Created Date: Apr 2 1973 12:00AM