水泥基材料氯離子滲透性研究
發(fā)布時間：2019-01-24 13:18
【摘要】：建筑物服役環(huán)境中的氯離子滲入混凝土內(nèi)部,逐步在混凝二土結(jié)構(gòu)內(nèi)部擴散、積聚至飽和濃度,引起鋼筋銹蝕,降低混凝土結(jié)構(gòu)承載力。如何高效、快捷地評價氯離子在混凝土結(jié)構(gòu)中的擴散行為已成為國內(nèi)外學者關(guān)注的熱點。為高效、快捷地評價混凝土結(jié)構(gòu)氯離子滲透性,開展混凝土結(jié)構(gòu)氯離子滲透性無損檢測方法的研究工作勢在必行�？v觀國內(nèi)外有關(guān)水泥基材料滲透性的影響因素和測試方法的研究現(xiàn)狀,本文在國家自然科學基金資助下(項目編號：51178069),對多種水泥基材料的電阻率影響因素；混凝土材料導電性和氯離子滲透性的關(guān)系等方面開展試驗和數(shù)值研究。研究工作主要包括以下內(nèi)容： 1.水泥基材料導電性影響因素研究。通過電阻試驗,對試驗數(shù)據(jù)進行數(shù)據(jù)分析,探討水灰比、齡期、初始氯離子含量、服役環(huán)境等因素對水泥基材料導電性的影響。 2.氯離子在混凝土材料中滲透性影響因素研究。通過RCM快速氯離子擴散試驗,分析環(huán)境中氯離子濃度、荷載對混凝土材料氯離子滲透性的影響。 3.混凝土材料氯離子滲透性和導電性的相關(guān)關(guān)系研究。通過電阻率測試試驗和RCM快速氯離子擴散試驗,分析處于不同的養(yǎng)護、服役環(huán)境的混凝土試件的氯離子滲透性和導電性的變化規(guī)律,探討混凝土試件的氯離子滲透性和導電性的相關(guān)關(guān)系。 4.氯離子在混凝土中擴散性預測研究。運用Comsol Multiphysics和Matlab軟件預測混凝土試件氯離子滲透性,驗證Fick第二定律和BP神經(jīng)網(wǎng)絡預測混凝土試件氯離子滲透性的準確性。
[Abstract]:The chloride ions in the service environment of buildings infiltrate into the concrete, and gradually diffuse in the concrete structure, accumulate to saturation concentration, cause the corrosion of steel bar and reduce the bearing capacity of concrete structure. How to evaluate the diffusion behavior of chloride ions in concrete structures efficiently and quickly has become a hot topic for scholars at home and abroad. In order to evaluate the chloride ion permeability of concrete structure efficiently and quickly, it is imperative to develop the nondestructive testing method of chloride ion permeability of concrete structure. In this paper, with the aid of the National Natural Science Foundation (project No.: 51178069), the influence factors on the resistivity of cement based materials are analyzed, which are related to the influencing factors and testing methods of cement based materials at home and abroad. Experiments and numerical studies have been carried out on the relationship between conductivity and chloride ion permeability of concrete materials. The research work mainly includes the following contents: 1. Study on the influencing factors of conductivity of cement-based materials. Through the resistance test, the data of the test data were analyzed, and the influence of water cement ratio, age, initial chlorine ion content and service environment on the conductivity of cement based materials were discussed. 2. Study on the factors affecting the permeability of chloride ions in concrete materials. The influence of chloride concentration and load on chloride ion permeability of concrete was analyzed by RCM rapid chloride diffusion test. 3. Study on the relationship between chloride ion permeability and conductivity of concrete materials. By means of resistivity test and RCM rapid chloride diffusion test, the variation of chloride ion permeability and conductivity of concrete specimens in different curing and service environments are analyzed. The relationship between chloride ion permeability and electrical conductivity of concrete specimens is discussed. 4. Prediction of the diffusivity of chloride ions in concrete. The Comsol Multiphysics and Matlab software were used to predict the chloride ion permeability of concrete specimens, and the accuracy of the second law of Fick and BP neural network for predicting the chloride ion permeability of concrete specimens was verified.
【學位授予單位】：大連海事大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU528
[Abstract]:The chloride ions in the service environment of buildings infiltrate into the concrete, and gradually diffuse in the concrete structure, accumulate to saturation concentration, cause the corrosion of steel bar and reduce the bearing capacity of concrete structure. How to evaluate the diffusion behavior of chloride ions in concrete structures efficiently and quickly has become a hot topic for scholars at home and abroad. In order to evaluate the chloride ion permeability of concrete structure efficiently and quickly, it is imperative to develop the nondestructive testing method of chloride ion permeability of concrete structure. In this paper, with the aid of the National Natural Science Foundation (project No.: 51178069), the influence factors on the resistivity of cement based materials are analyzed, which are related to the influencing factors and testing methods of cement based materials at home and abroad. Experiments and numerical studies have been carried out on the relationship between conductivity and chloride ion permeability of concrete materials. The research work mainly includes the following contents: 1. Study on the influencing factors of conductivity of cement-based materials. Through the resistance test, the data of the test data were analyzed, and the influence of water cement ratio, age, initial chlorine ion content and service environment on the conductivity of cement based materials were discussed. 2. Study on the factors affecting the permeability of chloride ions in concrete materials. The influence of chloride concentration and load on chloride ion permeability of concrete was analyzed by RCM rapid chloride diffusion test. 3. Study on the relationship between chloride ion permeability and conductivity of concrete materials. By means of resistivity test and RCM rapid chloride diffusion test, the variation of chloride ion permeability and conductivity of concrete specimens in different curing and service environments are analyzed. The relationship between chloride ion permeability and electrical conductivity of concrete specimens is discussed. 4. Prediction of the diffusivity of chloride ions in concrete. The Comsol Multiphysics and Matlab software were used to predict the chloride ion permeability of concrete specimens, and the accuracy of the second law of Fick and BP neural network for predicting the chloride ion permeability of concrete specimens was verified.
【學位授予單位】：大連海事大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TU528
【相似文獻】
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1 明靜;張亞梅;孫偉;;Permit法研究氯離子滲透性及其與混凝土孔隙率的關(guān)系(英文)[J];硅酸鹽學報;2010年09期
2 史美倫,張雄,吳科如;混凝土中氯離子滲透性測定的電化學方法[J];硅酸鹽通報;1998年06期
3 薛君s，
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