01331222

Monograph

http://onlinepubs.trb.org.../NCHRP134_Final_Report.pdf

This Innovations Deserving Exploratory Analysis (IDEA) project developed technology for rapid, contactless, accurate nondestructive evaluation (NDE) of large areas of bare concrete bridge deck structures for corrosion-induced delamination defects. Such damage in bridge decks results in significant costs to infrastructure management agencies. By developing a fully contactless acoustic impact-echo scanning system that incorporates advanced analysis technology, unparalleled bridge deck inspection capability to scan large sections of bridge deck in a timely and efficient manner is enabled. A testing prototype scanning system with an array of sensors has been designed, assembled and tested. The prototype makes use of a moving platform on a wheeled test frame that is designed to be towed behind a survey vehicle. At present, the prototype operates at a human walking pace. The system is designed to provide testing coverage of an entire lane of bridge deck in a single pass. With a modest amount of technical refinement, this technology has potential to bring significant impact to transportation practice; timely and accurate NDE and assessment yield significant benefit for practice through longer-lasting, more cost-effective systems that can better serve the users and reduce congestion and transportation costs while at the same time recouping the yearly high costs associated with bridge deck maintenance.

This NCHRP-IDEA investigation was conducted by the University of Illinois, Urbana-Champaign. 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

Highway IDEA Project 134

English

26p

2010-11

NCHRP-IDEA Program Project Final Report

Final Report

Print

Figures; Photos; References (13) ; Tables (1)

Acoustic detectors; Bridge decks; Corrosion; Cost effectiveness; Delamination; Inspection equipment; Maintenance management; Nondestructive tests; Prototypes; Technological innovations

Impact echo tests

Innovations Deserving Exploratory Analysis (IDEA) (Program)

Bridges and other structures; Highways; Maintenance and Preservation; Vehicles and Equipment; I61: Equipment and Maintenance Methods

TRIS, TRB

Mar 9 2011 8:38AM