TIME-TO-CORROSION OF REINFORCING STEEL IN CONCRETE SLABS VOL 1. EFFECT OF MIX DESIGN AND CONSTRUCTION PARAMETERS

THE PURPOSE OF THIS INVESTIGATION IS TO PROVIDE ADMINISTRATORS AND DESIGNERS WITH FACTUAL DATA ON WHICH TO BASE DECISIONS ON THE TYPE OF PROTECTION TO PROVIDE TO BRIDGE DECKS CONSTRUCTED IN CORROSIVE ENVIRONMENTS. SPECIFICALLY, THE OBJECTIVE IS TO DETERMINE THE RELATIVE TIME-TO-CORROSION OF REINFORCING STEEL EMBEDDED IN CONCRETE SLABS, FABRICATED FROM VARIOUS MIX DESIGNS AND CONSTRUCTION PROCEDURES WHEN THE SLABS ARE SUBJECT TO PERIODIC WETTING WITH A 3 PERCENT NAC1 SOLUTION. ONE HUNDRED AND TWENTY-FOUR, 4 FT. BY 5 T. BY 6-IN. REINFORCED CONCRETE SLABS WERE FABRICATED, CURED, AND PLACED IN THE OUTDOOR EXPOSURE YARD ON ELEVATED STANDS. CONCRETES COVERING THE FEASIBLE RANGE OF MIX DESIGNS WERE INVESTIGATED. CLEAR CONCRETE COVER OVER THE REINFORCING STEEL WAS VARIED FROM 1 TO 3 INCHES. FINISHING METHODS STUDIED INCLUDED WOOD FLOATING AND BROOMING, COMPACTING WITH A STEEL TROWEL, THE USE OF ABSORPTIVE FORM LINER, AND VACUUM PROCESSING OF THE FRESH CONCRETE. SURFACE REVIBRATION AND THE USE OF CHROMATE AND SILICONE ADMIXTURES WERE INVESTIGATED. MEMBRANE, POLYETHYLENE SHEET AND WET BURLAP CURING PROCEDURES WERE INCLUDED. SURFACE PROTECTIVE TREATMENTS INCLUDED BOILED LINSEED OIL AND STEARATE. SPECIAL TREATMENTS STUDIEND WERE POLYMER-IMPREGNATED CONCRETE, PERMANENT STEEL BRIDGE DECK FORMS, GALVANIZED REINFORCING STEEL, LATEX-MODIFIED CONCRETE, EPOXY-MODIFIED CONCRETE, A LOW WATER-CEMENT RATIO PORTLAND CEMENT CONCRETE OVERLAY, AN EXPANDED PUMICE ADDITIVE, AND FERRO-CEMENT. AN EVALUATION OF THE ELECTRICAL HALF-CELL CORROSION DETECTION TECHNIQUE WAS ALSO PERFORMED.

  • Corporate Authors:

    Federal Highway Administration

    Office of Research and Development, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • CLEAR, K C
    • HAY, R E
  • Publication Date: 1973-4

Media Info

  • Pagination: 103 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00212145
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-RD-73- 32 Intrm Rpt., FCP 24B1-012
  • Files: TRIS, USDOT
  • Created Date: May 7 1976 12:00AM