The Properties Studing Of The Concrete Eroded By Nitric Acid And Nitrate Corrosion

Currently, the degenerating of the endurance of the reinforced concrete structures due to corrosion has become a disaster for the civil engineering circles and a focus for the folks, which has been a hot spot for study. This research is just studing under the great background that the world pays attention to concrete durability more and more, just based on the Lei Hong-gang instructors for the Natural Science Foundation-funded projects in Shanxi Province, nitric acid and nitrate to the corrosion of reinforced concrete block test mechanical properties of the main line on the durability of concrete corrosion launches a certain research, mainly on a trial basis for the analysis of the corrosion of the concrete weight, appearance, strength and micro-changes, put forward on a pilot basis for the changes of corrosion.1. Combine the research background of durability at present, provide the definition of durability , has described the domestic and international current situation of study on concrete durability and nitrate to corrode and study the current situation to the concrete briefly, has explained the important realistic meaning in which durability studies,discussion and summarizing various kinds of and corroding the corrosion mechanism of making the concrete of factor function in detail, especially introduced the corrosion mechanism of the nitrate and nitric acid in detail, has offered the theoretical foundation for the thing that the test of the concrete is analysed, and various kinds of factors include physics function and impact on concrete of chemical action, has offered effective reference value for designing, constructing and using.2. Through the concrete test block the immersion test (make 255 Groups ,amounts to 765) and the compressive strength test after corrosion have drawn the changes law of the strength ,weight and appearance, and has tried the test on block concrete surface of the scanning electron microscope ,has its micro-changes,in order to lay a solid foundation of the reinforced concrete structure were nitrate and nitric acid corrosion of the bearing capacity, safety evaluation, life prediction, reinforcement Calculated strategy in the future, and has proved its corrosion law through charts.3. The detailed introduction improves the way of concrete structure durability, and put forward the concrete suggestion to the question in design , construct , the use and management of the concrete structure, it maintains and strengthens the method to propose the concrete after corroding.In this paper, through the corrosion of concrete block experiments to study the nitrate and nitric acid on the corrosion of concrete, made of corrosion after the changes of data in the future study of reinforced concrete corrosion and structural components of the test to provide a reference, to effectively guide our future Research, so that a more comprehensive study of nitrate's corrosion.