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Title: FIELD PERFORMANCE OF EXPERIMENTAL BRIDGE DECK MEMBRANE SYSTEMS IN VERMONT
Accession Number: 00394970
Record Type: Component
Availability: Find a library where document is available Abstract: The Vermont Agency of Transportation Bridge Deck Membrane Evaluation Program begun in 1971 is reviewed, and the field performance of 33 membrane systems over exposure periods of up to 11 years is discussed. Applications of deicing chemicals (sodium chloride) during the evaluation period have averaged 29.5 tons per two-lane mile per year, with accumulations totaling up to 123 lb of chloride (Cl-) per linear foot of structure. Performance results are based on the presence or absence of Cl- above base levels as determined by chemical analysis of more than 1,600 recovered concrete samples. The results indicate that, almost without exception, the experimental systems have outperformed the Agency's original standard treatment of tar emulsion. When grouped by general type, the best performance has been provided by the standard preformed sheet membranes and thermoplastic systems. Although somewhat less successful, satisfactory performance has been provided by the polyurethanes, the NCHRP Project 12-11 recommended systems, and miscellaneous preformed systems. In general, the epoxy and tar emulsion systems were not considered successful, although they have allowed only an average of 0.35 lb of Cl- per cubic yard of concrete more than base levels in the top inch of concrete as compared to an average of 6.97 lb/yd3 on exposed bridge decks over a similar evaluation period. Chloride contamination was detected in one sample or less on 33 percent of the 63 bridge decks under evaluation. Projections based on performance results to date suggest a significant number of the membrane systems will provide protection from serious Cl- contamination for 50 years or longer.
Supplemental Notes: Publication of this paper sponsored by Committee on Corrosion and Committee on Performance of Concrete. 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.
Monograph Accession #: 01419847
Authors: Frascoia, Ronald IEditors: Herman, Scott CPagination: pp 57-65
Publication Date: 1984
Serial: ISBN: 0309037182
Media Type: Print
Features: Figures
(2)
; References
(4)
; Tables
(13)
TRT Terms: Uncontrolled Terms: Geographic Terms: Old TRIS Terms: Subject Areas: Bridges and other structures; Design; Highways; Vehicles and Equipment; I24: Design of Bridges and Retaining Walls
Files: TRIS, TRB
Created Date: Jan 31 1986 12:00AM
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