Improved concrete bridge deck evaluation using GPR by accounting for signal depth-amplitude effects

被引：90
作者：
Barnes, Christopher L. [1 ]
Trottier, Jean-Francois [1 ]
Forgeron, Dean [1 ]
机构：
[1] Dalhousie Univ, Nova Scotia CAD CAM Ctr, Off B233, Halifax, NS B3J 2X4, Canada
来源：
NDT & E INTERNATIONAL | 2008年 / 41卷 / 06期
基金：
加拿大自然科学与工程研究理事会;
关键词：
ground penetrating radar; deck; chloride ingress; corrosion; damage; repair estimates;
D O I：
10.1016/j.ndteint.2008.03.005
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Ground-penetrating radar (GPIZ)surveys have tended to provide unpredictable accuracy in estimating areas of corrosion-induced damage in reinforced concrete bridge decks. Six in-service reinforced concrete bridge decks with exposed (unpaved) concrete wearing surfaces were surveyed using GPR to evaluate internal corrosion-induced damage for comparison against the chain drag and half-cell potential survey methods. A normalization procedure for removing GPR signal losses resulting from depth-dependent two-way travel time variations in the data was developed and thresholds for predicting chain-drag and half-cell potential-based estimates of deterioration quantity and location were established. Thresholds established using the amplitude-time correction provided significant improvements in the spatial and quantitative predictive capabilities of GPR for delineating corrosion-induced damage. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：427 / 433
页数：7
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