01080502

Monograph

http://onlinepubs.trb.org.../NCHRP033_Final_Report.pdf

https://ntlrepository.blo...300/16319/PB2000103402.pdf

This Innovations Deserving Exploratory Analysis (IDEA) project evaluated an innovative repair method for deteriorated highway bridge piers. This repair method uses high-strength, non-corrosive fiber reinforced polymer composites bonded to concrete. Pier columns of a highway bridge that were in need of repair were rehabilitated using this fiber composite wrap system. This IDEA project aimed at examining the process and possible causes of damage due to harsh environmental conditions of concrete pier columns wrapped externally with glass/aramid fiber composites. Major emphasis was on evaluating long-term performance and durability of such a wrap system. The durability of a fiber composite wrap system and the bond between the composite material and concrete were studied in order to establish the protection levels and confinement of concrete under harsh environments, freeze-thaw effects, and moisture seepage. A nondestructive evaluation method using an ultrasonic pulse generator was applied to concrete cylinders to detect delaminations and property degradation of the fiber composite wrap system. The basic concept of the IDEA project was to go from an "innovative repairing art" into sound engineering science and practice. The IDEA project has potential to lead to a viable rehabilitation method that will provide a durable and economic alternative to conventional repair.

This NCHRP-IDEA investigation was conducted by the University of West Virginia, Morgantown. 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

NCHRP-IDEA Project 33

NCHRP-33

English

81p

1999-6

NCHRP-IDEA Program Project Final Report

Final Report

Print

Appendices (3) ; Figures; Glossary; Photos; References; Tables

Bond strength (Materials); Bridge piers; Durability; Fiber composites; Freeze thaw durability; Nondestructive tests; Performance; Rehabilitation; Technological innovations; Ultrasonic detectors

Innovations Deserving Exploratory Analysis (IDEA) (Program)

Fiber reinforced polymer wraps

Bridges and other structures; Design; Highways; Maintenance and Preservation; I24: Design of Bridges and Retaining Walls; I61: Equipment and Maintenance Methods

NTL, TRIS, TRB

Oct 29 2007 9:48AM