SEAL AND SURFACE SUCCESSFULLY IN COOL WEATHER

CONCRETE BRIDGE DECKS CAN BE SURFACED AND SEALED WITH AN EPOXYBITUMEN CEMENT AND SAND AGGREGATE EVEN AT AIR TEMPERATURES OF 50 TO 55 DEGREE F. SOME OF THE WORK ON THE SAN FRANCISCO-OAKLAND BAY BRIDGE WAS DONE WITH DECK TEMPERATURES SEVERAL DEGREES COLDER, AND IN DAMP, FOGGY WEATHER. SURFACING AND SEALING THE 23 LANE MILES OF THE LOWER BRIDGE DECK REQUIRED MORE THAN 500,000 POUNDS OF SHELL GUARDKOTE 140 EPOXY CEMENT AND 1,300 TONS OF SAND AGGREGATE. THESE MATERIALS WERE COMBINED TO PRODUCE A LIGHTWEIGHT /18 POUNDS PER SQUARE YARD/ AND TRAFFIC RESISTANT WEARING SURFACE 1/8 TO 3/16 OF AN INCH THICK ON 155,000 SQUARE YARDS OF THE LOWER DECK. THE CONTRACTOR SCHEDULED HIS OPERATIONS SO THAT WORK CREWS SAND-BLASTED THE DECK SURFACES FROM 8 A.M. TO 2:30 P.M. ON A GIVEN DAY. HE THEN OPENED ALL LANES TO TRAFFIC. AT 7 P.M. OF THE SAME DAY CREWS LIGHTLY WHIPBLASTED THE PREPARED LANE TO REMOVE GREASE AND OIL DEPOSITS AND APPLIED THE EPOXY-BITUMEN CEMENT. PAVING NORMALLY TOOK 1 1/2 TO 2 HOURS AND WAS COMPLETED BY 11 P.M. /AUTHOR/

• Supplemental Notes:
  • Vol 80,no 6,PP 112-113
• Publication Date: 1965-6

Media Info

• Serial:
  • American City

Subject/Index Terms

• TRT Terms: Aggregates; Asphalt cement; Bridge decks; Concrete; Durability; Epoxides; Fog; Humidity; Sand; Seal coats; Sealing (Technology); Surfaces; Surfacing; Temperature; Traffic
• Uncontrolled Terms: Surface area
• Old TRIS Terms: Epoxy; Sealing
• Subject Areas: Geotechnology; Highways; Materials; Operations and Traffic Management;

Filing Info

• Accession Number: 00216096
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 12 1994 12:00AM