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Modeling on Chloride-induced Corrosion of Steel in Concrete

Author: GuiZhiHua
Tutor: WeiJun
School: Huazhong University of Science and Technology
Course: Structural Engineering
Keywords: Rebar Corrosion Rate Resistance of concrete [ Cl - ] / [ OH - ] Temperature
CLC: TU375
Type: Master's thesis
Year: 2005
Downloads: 465
Quote: 5
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Abstract


The steel corrosion cause premature failure of the concrete structure has become increasingly prominent disasters , States each year by steel corrosion caused by the direct and indirect losses large , far beyond people 's expectations , but also more and more cause for concern . In the study of concrete reinforcement corrosion problems, the assessment of the existing structure of the resistance and reliability evaluation , accurately predict the life of the structure and residual life , has a very important significance . Papers belonging to the National Natural Science Foundation of China (General Program ) \First of all , at home and abroad concrete reinforcement corrosion Research made ??a more comprehensive analysis focused on the steel corrosion on the mechanical properties of concrete structures and reinforced concrete flexural members , for example , leads to the bearing capacity and deformation of concrete members of the control the parameter - steel corrosion speed , and then from the material level made ??a more in-depth study of the steel corrosion speed . For the previous single-factor the corrosion velocity model is too simple and multi-factor model there are many shortcomings of the status quo , the establishment of a new forecasting model to improve the situation , consider the impact of factors such as the resistance of concrete , reinforced concrete chloride ion concentration the ratio of the concentration of hydroxyl ions [ Cl - ] / [ OH - ] , steel / concrete interface temperature T ; tested to determine the correctness of the model formula . Experimental study concrete resistance R c - steel corrosion rate one of the key factors of in different chloride diffusion and freeze-thaw damage to the environment , with the water-cement ratio and time or the number of freeze-thaw changes , the following conclusions : the concrete resistance value in the one-dimensional diffusion conditions and increase growth over time ; under the same chloride the soaking environment and water-cement ratio , the number of freeze-thaw little n R c showed a tendency to increase , and when an increase in the number of freeze-thaw when R c began decreasing trend ; resistance of concrete in NaCl soaked environment than KCl soaking environment .

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CLC: > Industrial Technology > Building Science > Building structure > Concrete structure,reinforced concrete structure > Reinforced concrete structures
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