Development of an integrated assessment tool for concrete infrastructure

加拿大混凝土基础设施老化，并面临着许多形式的恶化，包括 ** 钢筋腐蚀，冻融破坏，徐变，收缩，疲劳和碱-硅反应。大多数 ** 老化机制是在一段较长的时间内逐渐形成的，定期检查过程 ** 是资产管理和维护计划的重要组成部分。常规做法几乎完全依赖于常规目视检查，通常大约每两年进行一次。这些检查通常是主观的、耗时的和劳动密集的。更重要的是，它们可能受到访问限制，或可能导致技术人员暴露于辐射，化学品或某些设施中的生物危害的风险。许多损坏的迹象一直没有被注意到，直到很晚的阶段，当损坏是广泛的 ** 和从表面可见。各种非破坏性工具可用于评估 ** 混凝土构件的内部状况，但它们的使用往往受到成本和经验的限制，通常仅在目视检查期间报告 ** 问题时才使用。有必要改进主动监测战略 **，以提供损害发展的预先通知，这些战略成本低，易于实施，易于解释，并与自动跟踪系统相结合，以监测随着时间的推移而发生的变化。拟议的 ** 项目旨在开发一种自动评估工具，将非破坏性 ** 测量（内部测绘）的数据与外部图像（非接触式外部测绘）相结合，对混凝土基础设施的状况进行全面 ** 评估。该技术将提高 ** 检测流程的速度和精度，为基础设施所有者提供经济高效的解决方案。**

Canadian concrete infrastructure is aging and faced with many forms of deterioration including corrosion of**steel reinforcement, freeze-thaw damage, creep, shrinkage, fatigue, and alkali-silica reaction. Most**deterioration mechanisms gradually develop over an extended period of time, and regular inspection processes**are an important component of asset management and maintenance programs. Conventional practices rely**almost exclusively on routine visual inspections which typically occur approximately every two years. These**inspections are generally subjective, time-consuming, and labour-intensive. More importantly, they may be**restricted by access or may result in risk of technician exposure to radiation, chemicals, or bio-hazards in**certain facilities. Many signs of damage remain unnoticed until very late stages when the damage is extensive**and visible from the surface. Various non-destructive tools are available to assess the internal condition of**concrete elements, but their use is often limited by cost and experience, and usually are only introduced when**issues are reported during the visual inspection. There is a need for improved proactive monitoring strategies**that can provide advance notice of damage development which are low cost, easy to implement, simple to**interpret, and integrated within an automated tracking system to monitor changes over time. The proposed**project aims to develop an automated assessment tool which combines data from non-destructive**measurements (internal mapping) with external images (non-contact external mapping) to provide a holistic**evaluation of the condition of concrete infrastructure. This technology will increase the speed and precision of**inspection processes to provide a cost-effective solution for infrastructure owners.**