CORROSION RESISTANCE STUDY OF NICKEL-COATED DOWEL BARS
IN ORDER THAT A TRANSVERSE EXPANSION JOINT IN A RIGID PAVEMENT FUNCTION PROPERLY, IT IS NECESSARY THAT THE LOAD TRANSFER DOWELS OFFER LITTLE RESISTANCE TO SLAB MOVEMENTS. THE INCREASED USE OF VARIOUS SALTS FOR ICE REMOVAL HAS CAUSED DOWEL BAR CORROSION TO BE OF SOME CONCERN. THE PRODUCTS OF CORROSION FROM ORDINARY STEEL DOWEL BARS EXHIBIT A LARGE VOLUME INCREASE WHICH CAUSES A DOWEL TO FREEZE SO THAT IT NO LONGER FUNCTIONS PROPERLY. THE USE OF RUST RESISTANT METAL COATINGS ON STEEL DOWEL BARS HAS SHOWN PROMISE IN PREVENTING THE DEVELOPMENT OF CORROSION PRODUCTS. THIS INVESTIGATION CONSISTED OF SUBJECTING ORDINARY STEEL DOWEL BARS AND VARYING THICKNESSES /3, 5, 7, AND 10 MIL/ OF NICKEL-COATED DOWEL BARS, EMBEDDED IN CONCRETE BEAMS, TO A SOAKING IN BRINE AND DRYING EXPOSURE. PERIODICALLY, THE FORCE NECESSARY TO CAUSE MOVEMENT OF THE DOWEL BARS WAS MEASURED. THIS STUDY HAS BEEN UNDER WAY FOR 1 1/2 YRS. BASED ON THE PRESENT EXPOSURE PERIOD, IT IS EVIDENT THAT A VERY MARKED REDUCTION IN THE FORCE NECESSARY TO CAUSE MOVEMENT OF THE NICKEL-COATED DOWEL BARS WAS OBSERVED WHEN COMPARED TO THE UNCOATED DOWEL BARS. /AUTHOR/
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Supplemental Notes:
- Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
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Authors:
- Wood, L E
- Lavoie, R P
- Publication Date: 1963
Media Info
- Media Type: Digital/other
- Features: Appendices; Figures; Photos; References; Tables;
- Pagination: pp 25-34
- Monograph Title: Concrete pavement design
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Serial:
- Highway Research Record
- Issue Number: 44
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Bars (Building materials); Beams; Concrete; Corrosion resistance; Dowels (Fasteners); Expansion joints; Load transfer; Metal coatings; Nickel; Rigid pavements; Rust prevention; Salts; Snow and ice control; Specimens; Steel; Transverse joints; Volume changes
- Uncontrolled Terms: Concrete beams
- Old TRIS Terms: Load transfer device
- Subject Areas: Highways; Pavements;
Filing Info
- Accession Number: 00206205
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Feb 20 1994 12:00AM