The Influence Of Boundary Layer Effects On Sulfuric Acid Corrosion Resistance Properties Of Concrete

As the rapid development of industrialization and urbanization, acid rain has gradually become a global issue. The component of acid rain in China is coal-generated sulfur oxides and is sulfuric acid-based acid rain, hence the study of sulfuric acid corrosion of the concrete or cement mortar is of significantly importance.In this dissertation, according to the concrete long-term immersion test, get a lot of testing data, by the objects of research, the corrosion mechanisms by the sulfuric acid are revealed. The main research contents and methods are as follows:Based on reaction boundary layer tentative, and the law of the acid consumption rate varying with time is obtained, further deduced the law of the acid consumption with time. By analyzing the test data, which shows that the theoretical model can well reflect the results. And proved the law of the acid consumption with time was contained the boundary layer effects, at the same time, the validity of theoretical model is proved.By obtaining the theoretical point of time generated by the boundary layer effects, and compared with the actual point in time trials produce boundary layer effects, has analyzed the relationship between the two point of time and causes of the different. This provides a theoretical basis for the future on how to solve the acid consumption rate of premature boundary layer effects, thereby reducing the concrete as soon as possible.The research results obtained in this dissertation provide a foundation for the further study of structural materials corrosion by sulfuric acid and a theoretical support for an early settlement of the durability of concrete structure in the sulfuric acid environment.This dissertation is part of the project sponsored by the Natural Science Foundation of China and Yunnan Province (Grant No.51078175,2008E038M).