Improving ground penetrating radar evaluation of corrosion in reinforced concrete bridge decks

改进探地雷达对钢筋混凝土桥面腐蚀的评估

• 批准号: 386564-2010
• 负责人: Barnes, Christopher
• 金额: $ 1.82万
• 依托单位: Dalhousie University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=550485
• 关键词: Improving; ground; penetrating; radar; evaluation

This Discovery grant proposal supports a long term research program at Dalhousie University in Non-Destructive Evaluation (NDE) of civil infrastructure by extending techniques for evaluating Ground Penetrating Radar (GPR) data from exposed surface (unpaved) reinforced concrete decks to the more complicated case of asphalt paved decks. Reinforced concrete bridge decks tend to be one of the most problematic elements to accurately diagnose corrosion damage, particularly when asphalt concrete wearing surfaces are present. The proposed research will extend our fundamental understanding of how GPR signal propagation is affected through multilayered pavement systems (bridge decks) and their various degrees of damage and chloride contamination. Specifically, the research will focus on two areas: modeling and quantifying signal attenuation resulting from the condition and thickness of the asphalt concrete; and, the effect of different chloride concentration profiles within the cover layer on the signal loss threshold used to predict corrosion damage. Successful adaptation of the applicant's current approach for evaluating unpaved reinforced concrete bridge decks to the more common and complex case of deteriorated asphalt-paved decks will greatly improve the accuracy and reliability by which repairs of corrosion-induced damage can be estimated and prioritized on a network level. Modeling and calibrating the phenomena over a broad range of normal and high performance concrete mixtures used in industry today will extend its application to a broader range of materials used in service. The ability to evaluate the condition of the asphalt concrete will also have significant impact in highway pavement systems evaluation. One Ph.D. and two Master of Applied Science students will be trained through the proposed research, developing two consulting engineers who are skilled in GPR investigations of infrastructure and one academic researcher who will continue to advance research in this field. The students will gain a foundation of strong research skills and industrial experience through collaboration with international colleagues, local industry, and research presentations at relevant international conferences.

这项发现赠款提案通过扩展从暴露的表面（未铺设的强化）加固的混凝土甲板上评估地面穿透性雷达（GPR）数据的技术来支持民用基础设施的非破坏性评估（NDE）的一项长期研究计划，以使其更为复杂。 钢筋混凝土桥甲板往往是准确诊断腐蚀损伤的最有问题的元素之一，尤其是在存在沥青混凝土磨损表面时。拟议的研究将扩展我们对GPR信号传播如何通过多层路面系统（桥梁甲板）及其各种损害和氯化物污染程度影响的基本理解。 具体而言，该研究将集中在两个领域：建模和量化沥青混凝土状况和厚度所产生的信号衰减；并且，盖层内不同氯化物浓度曲线的影响对预测腐蚀损伤的信号损耗阈值。 成功适应了申请人当前评估未铺设的钢筋混凝土桥梁甲板的方法，以更常见且复杂的沥青盘甲板的恶化案例，可以大大提高腐蚀诱导的损害的修复的准确性和可靠性，可以在网络级别上估算并优先考虑。 在当今行业中使用的广泛和高性能混凝土混合物中，建模和校准现象将扩展到服务中使用的更广泛的材料。 评估沥青混凝土状况的能力也将对高速公路路面系统评估产生重大影响。 一位博士两位应用科学专业的学生将通过拟议的研究进行培训，开发两名咨询工程师，他们熟练研究基础设施的研究，一名学术研究人员将继续进步在该领域的研究。 学生将通过与国际国际会议的国际同事，当地工业和研究演讲获得强大的研究技能和工业经验的基础。