Development of an integrated assessment tool for concrete infrastructure

加拿大混凝土基础设施正在老化，面临着多种形式的恶化，包括钢筋锈蚀、冻融破坏、蠕变、收缩、疲劳和碱-硅酸反应。大多数**恶化机制是在较长的时间内逐渐形成的，而定期检查过程**是资产管理和维护计划的重要组成部分。传统的做法几乎完全依赖于通常大约每两年进行一次的例行目测检查。这些检查通常是主观的、耗时的和劳动密集型的。更重要的是，它们可能**受到进入限制，或可能导致技术人员暴露在**某些设施中的辐射、化学物质或生物危害中。许多损害的迹象直到很晚的阶段才被注意到，那时损害是广泛的**并且从表面上可以看到。有各种无损工具可用于评估**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，通常只有在目视检查中报告**问题时才会引入。需要改进的主动监测战略**，这种战略可以提供低成本、易于实施、易于**解释并集成在自动跟踪系统中的损害发展的提前通知，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化评估工具，将来自非破坏性**测量(内部映射)的数据与外部图像(非接触式外部映射)相结合，以提供对混凝土基础设施状况的全面**评估。这项技术将提高**检查过程的速度和精度，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.**