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Monitoring of Corrosion in Submerged Reinforced Concrete Structures Using Biological Indicators

机译：使用生物指示剂监测水下钢筋混凝土结构中的腐蚀

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摘要

Corrosion of steel has severe economic impacts on industry and infrastructure. Reinforcement corrosion and subsequent loss of strength is the reason for failures in numerous reinforced concrete structures that leads to billions of dollars in losses. Thus corrosion detection is of great importance. Currently, corrosion detection in existing structures is performed using non-destructive methods, which include ultrasonics, radiography, thermography, and enhanced photographic imaging. Such methods are quick but lack details and can be unreliable. An alternative approach may be measuring conditions like pH that affect corrosion. Lowering of pH can indicate that corrosion can occur. It has also been identified that certain biological factors like bacteria play a major role in corrosion through a process called Microbial Induced Corrosion (MIC). Bacteria accumulate over metal surfaces over time forming biofilms, creating environments favorable for corrosion. This thesis attempts to study the correlation between corrosion of reinforcement steel in concrete and bacterial activities measured at the concrete surface and thereby observe the effectiveness of using bacterial activities to indirectly detect corrosion in the reinforcement steel.
机译：钢铁腐蚀会对工业和基础设施产生严重的经济影响。钢筋腐蚀和随后的强度损失是许多钢筋混凝土结构中导致数十亿美元损失的原因。因此，腐蚀检测非常重要。当前，现有结构中的腐蚀检测是使用非破坏性方法进行的，包括超声，射线照相，热成像和增强的照相成像。此类方法快速但缺少细节，因此可能不可靠。一种替代方法是测量诸如pH的条件，这些条件会影响腐蚀。 pH值降低可能表明会发生腐蚀。还已经确定，某些生物因子（例如细菌）通过称为微生物诱导腐蚀（MIC）的过程在腐蚀中起主要作用。随着时间的推移，细菌会在金属表面积聚，形成生物膜，从而形成有利于腐蚀的环境。本文试图研究混凝土中钢筋腐蚀与混凝土表面细菌活性之间的相关性，从而观察利用细菌活性间接检测钢筋中腐蚀的有效性。

著录项

  • 作者

    Thampi, Jithin.;

  • 作者单位

    University of Maryland, College Park.;

  • 授予单位 University of Maryland, College Park.;
  • 学科 Engineering.;Civil engineering.
  • 学位 M.S.
  • 年度 2017
  • 页码 84 p.
  • 总页数 84
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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