抑制海洋环境下钢筋锈蚀的迁移性阻锈剂在混凝土中的传输实验及分析
毕业论文关键词：氯盐侵蚀，钢筋混凝土，阻锈剂传输，传输模型，传输方程
Title Experiment and analysis of migrating corrosion inhibitors (MCI) transport in concrete
Abstract Development and background of migrating corrosion inhibitors(MCI)as well as the significance of maintenance and improvement of durability in reinforced concrete structure using MCI are introduced. The reinforcing steel bars in concrete structures in marine environment are corroded by chloride, which reduce its durability and shorten the service lifetime. Studies on chloride corrosion and the transfer of corrosion inhibitors is of great significance to carry out long-lifetime design and to improve the security of concrete structures. To solve this problem, numerical simulation and experiments were used to investigate the change regulation of corrosion inhibitors transport under different conditions. In order to expediently developing the numerical simulation of concrete wet process by MCI, this article reference the transfer model of moisture equivalent diffusion in concrete, and give the transfer model of concrete wet process by MCI. The main contents and conclusions are as follows: (1) Based on the MCI transport mechanism in concrete, using Fick's law and Darcy's law, and law of conservation of mass, the MCI transport equation in concrete, which is associated with vapor diffusion and liquid penetration, was established. The equation is a nonlinear partial differential equation, and it is solved by one-point subdomain high precise integration method to obtain an one-dimension semi-analytical solution, and an analytical program is completed by MATLAB language. (2) Some mortar samples with different water-cement ratios were designed and cut into groups of slices in accordance with one-dimension transport of corrosion inhibitors. The transport experiments of corrosion inhibitors in the slices were carried to verify the established corrosion inhibitors model. There result indicates that the results from the corrosion inhibitors transport model agree well with that of experiments, thus it can be used to analyze the process of the corrosion inhibitors transport in concrete.
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