Cost-Effective Repairs of Marine Concrete Piles

世界上几乎任何地方都可以找到海洋结构物，甚至是一些相对较新的结构物，其中含有开裂或剥落的混凝土，通常涉及钢筋的腐蚀。虽然已经采取了几种控制腐蚀的方法，但飞溅区的过早腐蚀仍然是一个令人严重关注的问题。60‘S的基本理念是“更换而不翻新”，这与相对较低的建设成本和“丢弃”的态度是一致的。然而，当前对经济考虑、能源问题和环境问题的担忧已经显著改变了这种思维模式。材料技术的新的和创新的发展使维修程序变得可行和非常具成本效益。这是对海洋桩的创新修复概念的明确需求，其成本低于需要昂贵维护技术的传统补丁修复方法。修复概念通常是恢复或增强以下一项或多项：耐久性、结构强度、功能和外观。成本效益是应用可行性的一个重要因素。拟议的项目是佛罗里达大西洋大学与墨西哥马亚布大学和坎佩切大学的联合实验调查，将导致开发适当的针对结构和环境的修复程序。所开发的方法将帮助沿海工程师设计持久加固方案，ii)从可用方案中选择最合适的修复程序，以及iii)预测具体方案的加固程度和性能。修复程序将为海岸修复和恢复手册提供宝贵的资料。

Almost everywhere in the world it is possible to find marine structures, even some relatively new ones, which contain cracked or spalled concrete usually involving corrosion of the reinforcement. Several methods of controlling corrosion, have been adopted, but premature corrosion in the splash zones continues to be a problem of serious concern.The basic philosophy of the 60's "to replace and not to renovate" was consistent with relatively low constructional costs and the "throw-away" attitude. However, the current concerns regarding economic considerations, energy issues, and environmental problems have significantly altered this mode of thinking. New and innovative developments in materials technology make repair procedures feasible and very cost-effective. This is an identified need for innovative repair concepts for marine piles with lower costs than conventional patch repair methods that require expensive maintenance techniques. The repair concepts will generally be to restore or enhance one or more of the following: durability, structural strength, function, and appearance. Cost-effectiveness is an important factor for feasibility of application.The proposed project, a joint experimental investigation of Florida Atlantic University and the Universities of Mayab and Campeche in Mexico, will lead to the development of appropriate structure-specific and environment-specific repair procedures. The developed methodology will help the coastal engineer to design durable strengthening schemes, ii) select the most appropriate repair procedure from available options, and iii) predict the degree of strengthening and performance for specific options. The repair procedures will provide valuable input to Coastal Repair and Rehabilitation Manuals.