Fundamental understanding of the corrosion behavior of galvanized steel reinforcement in mechanically stabilized earth walls

在过去的30年里，机械稳定土(MSE)墙和墙面的使用在北美得到了广泛的接受，无数已完工的结构就是明证。MSE墙和墙面暴露在侵蚀性条件下可能会导致早期损坏，而暴露在除冰盐中的区域往往呈现类似于侵蚀性环境的条件。本项目旨在更好地了解镀锌钢在除冰盐和其他环境污染物中的腐蚀行为。本项目的目标是确定腐蚀条件下镀锌钢板腐蚀的环境原因，并确定最佳的镀锌层特性和可能的表面处理，以提高MSE墙和面板的耐腐蚀性，从而为MSE墙在腐蚀环境下的施工制定一套施工指南。这项研究将有助于了解MSE墙和面板的腐蚀行为，以便在未来的道路基础设施建设项目中更好地进行质量控制，并优化运行参数。这项工作的结果对私营部门以及加拿大的运输和公共部门都很重要。这项工作对加拿大和赞助商的预期好处是巨大的，并将对其他加拿大公司在全球市场上有效竞争的能力产生影响。

The use of Mechanically Stabilized Earth (MSE) walls and facings have gained widespread acceptance in North America for the past 30 years, as evidenced by the numerous completed structures. Exposure of MSE walls and facings to aggressive conditions could lead to early failure, and areas exposed to de-icing salts tend to present conditions similar to aggressive environments. This project seeks to attain a better understanding of the corrosion behavior of galvanized steel when exposed to de-icing salts and other environmental pollutants. The objectives to this project are to ascertain the environmental causes of corrosion in galvanized steel under aggressive conditions, and to identify the optimum galvanized coating characteristics and possible surface treatments to improve the corrosion resistance of MSE walls and facings in order to create a set of construction guidelines for the construction of MSE walls under aggressive environments. The research will be highly beneficial to understand the corrosion behavior of MSE walls and facings which would allow better quality control in future road infrastructure construction projects and to optimize the operational parameters. The results of this work are of importance to the private sector, and also to the transportation and public sectors in Canada. The anticipated benefits of the work to Canada and the sponsor are significant and will have an impact on the ability of other Canadian companies to compete efficiently in the global market.