This report describes the performance of alkyltrialkoxysilane chemical products and their ability to protect bridge structures from moisture, chloride ingression, and corrosion of reinforcing steel. As a result of the evaluation, the following recommendations are made: (1) The application of silane should be used to protect bridge structures from moisture and chloride ingression, and corrosion of reinforcing steel. (2) The silane treatment should be used on both new and existing bridge structures in which the chloride content at the rebar depth has not exceeded 2.5 lb/cu yd, or the corrosion potentials over the bridge deck area numerically do not exceed -350 millivolts. (3) A dry concrete surface is essential for successful application. An application rate of 125 sq ft/gal for horizontal surfaces and 175 sq ft/gal for vertical surfaces is recommended. After application, and the silane has penetrated, water should be applied to assure sufficient moisture for chemical reaction between the silane and concrete. (4) The Oklahoma Department of Transportation field testing of the bridge decks selected for the silane performance evaluation should be continued through 1996 to determine the long term performance.

  • Corporate Authors:

    Oklahoma Department of Transportation

    200 NE 21st Street
    Oklahoma City, OK  United States  73105

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Smith, M D
  • Publication Date: 1986-12


  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 76 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00979967
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/OK 86(4),, Final Report
  • Created Date: Oct 8 2004 12:00AM