Cost-Effective Repairs of Marine Concrete Piles

具有成本效益的海洋混凝土桩修复

• 批准号: 0116602
• 负责人: D Reddy
• 金额: --
• 依托单位: Florida Atlantic University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-15 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0116602&HistoricalAwards=false
• 关键词: Cost; Effective; Repairs; Marine; Concrete

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.

在世界上几乎任何地方都有可能发现海工结构，甚至一些相对较新的海工结构，其中包含开裂或剥落的混凝土，通常涉及钢筋腐蚀。虽然已经采用了几种控制腐蚀的方法，但飞溅区的过早腐蚀仍然是一个严重的问题。60年代的基本理念是“更换而不是翻新”，这与相对较低的建造成本和“丢弃”的态度是一致的。然而，目前对经济考虑、能源问题和环境问题的关注大大改变了这种思维模式。材料技术的创新发展使维修程序变得可行，并且非常具有成本效益。这是一个确定的需要创新的维修概念，海洋桩与成本较低的传统补丁修复方法，需要昂贵的维护技术。维修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和墨西哥Mayab大学和Campeche大学的联合实验研究，将导致开发适当的结构特定和环境特定的修复程序。所开发的方法将有助于沿海工程师设计持久的加固方案，ii）从现有的选项中选择最合适的修复程序，iii）预测特定选项的加固程度和性能。修复程序将为《海岸修复和恢复手册》提供宝贵的资料。