FOURTEEN YEARS' SERVICE WITH DEEP IMPREGNATION OF A REINFORCED CONCRETE BRIDGE DECK. EXTENDING THE LIFE OF BRIDGES--SYMPOSIUM, LAKE BUENA VISTA, FLORIDA, DECEMBER 5, 1989

A test installation of deep impregnation was applied to a heavily traveled bridge deck in Bethlehem, Pennsylvania, in 1975. The deep impregnation process involves drying the concrete, impregnating with a monomer to a depth of 3 to 4 in., and polymerizing the monomer in situ. At the time of the impregnation, the bridge deck was eight years old and the chloride contents were above the corrosion threshold level. The test area, 3.7 sq m, is centered on the right wheel path of the traffic lane. During the 14-year period, spalling and delaminations have occurred on 20% of the deck with no evidence of spalling or delamination in the impregnated area. The deep impregnation has reduced the surface wear in the wheel path by 65%. Chloride contents have increased in both areas but at a slower rate in the impregnated area. The percent active corrosion potentials have remained the same in the nonimpregnated area but increased to 50% in the impregnated area. However, the corrosion current in the impregnated area is a factor of six less than in the nonimpregnated area. The concrete resistivity is a factor of six higher in the impregnated area and of sufficient magnitude to significantly reduce the rate of corrosion. Microscopical examination of cores showed that preexisting corrosion cells were arrested by the impregnation process.

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  • Corporate Authors:

    American Society for Testing and Materials (ASTM)

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  United States  19428-2957
  • Authors:
    • Weyers, R E
    • Cady, P D
    • FEENEY, M A
    • HOW LUM, S F
  • Publication Date: 1990-8

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  • Accession Number: 00603228
  • Record Type: Publication
  • ISBN: 0-8031-1402-8
  • Files: TRIS
  • Created Date: Jan 31 1991 12:00AM