Studies On Behaviors Of Corroded Reinforced Concrete Structure And Some Corrosion Inhibitors And Their Application

In this paper,the mechanics behavior of the corroded steel bar ,the bond behavior between the concrete and the reinforcement steel, the structural behavior in the corroded reinforced concrete structure and the behavior of some corrosion inhibitors are studied.at meanwhile,an engineering projiected is given as a case to introduce the application of the aforementioned research in engineering practice.1) In this thesis , the stress-strain curve ,the degradation behavior of the ductile strength of the reinforcement steel in the corroded concrete are analysed. Then the relationship of the reinforcement steel corrosion and the bond stress between the concrete and the reinforcement steel is also analysed. After summarizing a great deal of experimental datum at home and abroad, the destruction model and the the destructive characteristics of the corroded reinforced concrete bending element and axial compressive element are analysed, the relationship between the degradation behavior of the corrosive reinforced concrete and the degradation behavior of the structure is revealed, then the calculating method of the bearing capacity of the corrosive element is introduced and the principle of the degradation behavior of the corrosive reinforced concrete is analysed.2) the rustproof technique of the reinforcement steel in the concrete is introduced,the characteristics classification and the active principle of steel corrosion inhibitors at home and abroad are studied by the corrosive electrical and chemical potential difference test and the comparictive experiment. The rustproof behavior of the new rebar inhibitor Sika901 is appraised.3) On the basis of the theoretical research and the experimental results, the aforementioned study results are used in the appraisal of thestructural reliability and the rebuilding engineering of an ice-loading platform.The engineering rebuilding a new ice-loading platform was from Oct. 2001 to Mar. 2002.By adoping a series of measures such as mixing rebar inhibitor Sika 901 being applied first in China into the concrete and so7on ,the new ice-loading platform has endured the proof from loading ice successfully,it's structure has incarnated excellent ability to resist the corrosion.The engineering case has testified that the research results about behavior of the corroded reinforced concrete structure and some steel corrosion inhibitors are reasonable and reliable.In the design of the reinforced concrete structure,besides considering the ultimate limit states and the serviceability limit states,we should also consider the durable limit in the different work environments so that ensure the structure keep it's serving ability in the design time limit.