INTERNALLY SEALED CONCRETE - PHASE 1

INVESTIGATION OF INTERNALLY SEALING CONCRETE BY INCORPORATING SMALL PARTICLES OF POLYMERS AND WAXES AT THE TIME OF MIXING, AND SUBSEQUENTLY WARMING TO INDUCE FUSION AND FLOW OF THESE ADDITIVES, IS REPORTED. FIVE TYPES OF ADDITIVE WERE EVALUATED USING A CONSTANT PORTLAND CEMENT CONCRETE. SEALED SPECIMENS AND STANDARDS WERE EXPOSED TO A SALINE SOLUTION FOR UP TO NINETY DAYS AT CONSTANT (70 DEG) TEMPERATURE AND THIRTY FREEZE/THAW CYCLES. ALL ADDITIVES EVALUATED SHOWED A SIGNIFICANT ABILITY TO BLOCK CHLORIDE AND WATER PENETRATION. THE MOST SUCCESSFUL, AN ESTER WAX, LIMITED CHLORIDE PENETRATION TO APPROXIMATELY .05 PERCENT IN THE TOP (EXPOSED SURFACE) 0.5 INCH AFTER NINETY DAYS EXPOSURE. BY COMPARISON, THE UNMODIFIED CONCRETE SPECIMENS REACHED A SATURATION CONTENT OF APPROXIMATELY .40 PERCENT IN LESS THAN 7 DAYS. PHASE II OF THIS ON-GOING PROGRAM WILL CONCENTRATE ON OPTIMIZATION OF CHEMICAL AND PHYSICAL PROPERTIES OF THE SEALING ADDITIVE AND THE DEVELOPMENT OF HEAT TREATING METHODS NECESSARY TO UTILIZE THIS TECHNIQUE IN BRIDGE DECK CONSTRUCTION. /FHWA/

  • Corporate Authors:

    Monsanto Research Corporation

    Dayton Laboratory, 1515 Nicholas Road
    Dayton, OH  USA  45407

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  USA  20590
  • Authors:
    • Jenkins, G H
  • Publication Date: 1973-3

Media Info

  • Pagination: 63 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00212135
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-RD-73- 28 Intrm Rpt., FCP 34B1-202
  • Contract Numbers: FH-11-7884
  • Files: TRIS, USDOT
  • Created Date: Aug 15 1976 12:00AM