海洋大气区混凝土表面氯离子浓度的形成机理和多因素模型

发布时间：2018-07-18 21:41

【摘要】：揭示海洋氯离子在大气中和混凝土内部两个不同阶段的传输机理和影响因素,在此基础上研究建立海洋大气区混凝土表面氯离子浓度的多因素计算模型。首先分析海洋大气区混凝土表面氯离子浓度的主要影响因素,并揭示海洋环境条件、混凝土材料特性和暴露时间等因素对混凝土表面氯离子浓度的影响规律;然后综合考虑离海岸距离、风速、水胶比、胶凝材料种类、暴露时间等关键因素的影响,结合欧洲、北美、南美和亚洲等多地海洋自然暴露试验数据和两阶段多元非线性回归分析,建立具有广泛适用性的海洋大气区混凝土表面氯离子浓度多因素模型;最后与现有经验模型的预测值和自然暴露试验数据进行对比分析,验证该模型的有效性和适用性。
[Abstract]:The transmission mechanism and influence factors of marine chlorine ion in two different stages of atmosphere and concrete are revealed. On this basis, a multi factor calculation model for the establishment of chloride ion concentration on concrete surface in marine atmosphere is studied. The main factors affecting the concentration of chloride ion on the concrete surface of the ocean atmosphere are analyzed, and the marine environment is revealed. Conditions, the influence of concrete material properties and exposure time on the chloride concentration of concrete surface, and then the influence of the key factors such as the distance from the coast, the wind speed, the water to glue ratio, the type of gelatin material, the exposure time and other key factors, combined with the multiple marine natural exposure test data in Europe, North America, South America and Asia, and the two stage The multi factor model of chloride ion concentration on the concrete surface of marine atmosphere area is established by the meta nonlinear regression analysis. Finally, the validity and applicability of the model are verified by the comparison and analysis of the predicted value of the existing empirical model and the natural exposure test data.
【作者单位】：广西大学土木建筑工程学院;广西大学工程防灾与结构安全教育部重点实验室;广西大学广西防灾减灾与工程安全重点实验室;广西财经学院;
【基金】：国家自然科学基金(51368006,51678165,51668008)
【分类号】：TU528

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