| 引用本文: | 王元战,刘恒,周海锋,林陈安攀.受荷混凝土中钢筋锈蚀速率计算方法[J].材料科学与工艺,2015,23(6):12-17.DOI:10.11951/j.issn.1005-0299.20150603. |
| WANG Yuanzhan,LIU Heng,ZHOU Haifeng,LIN Chenanpan.Calculation of concrete steel corrosion rate under the action of load[J].Materials Science and Technology,2015,23(6):12-17.DOI:10.11951/j.issn.1005-0299.20150603. |
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| 受荷混凝土中钢筋锈蚀速率计算方法 |
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王元战1,2,刘恒1,2,周海锋3,林陈安攀4
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(1.水利工程仿真与安全国家重点实验室(天津大学),天津 300072;2.高新船舶与深海开发装备协同创新中心,天津 300072; 3.江苏省交通规划设计院股份有限公司,南京 210014;4.中交第四航务工程勘察设计院有限公司,广州 510230)
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| 摘要: |
| 为研究荷载对钢筋锈蚀速率及结构耐久性的影响,在潮汐区与盐雾区开展不同荷载条件下氯离子扩散试验,荷载大小分别为无荷载、0.3倍和0.5倍混凝土抗折强度.在混凝土中掺入氯盐,开展不同浓度氯盐条件下的钢筋锈蚀试验.通过氯离子扩散试验得到荷载对氯离子扩散影响系数与荷载大小的关系,修正菲克第二定律中的氯离子扩散系数.钢筋锈蚀试验中测试不同时间下混凝土构件中钢筋的锈蚀电流密度,拟合出钢筋锈蚀电流密度与氯盐浓度和锈蚀时间之间的关系.结合混凝土中考虑荷载影响的氯离子扩散模型与钢筋锈蚀模型,给出荷载作用下混凝土中钢筋锈蚀速率的计算方法.该方法对于海洋环境中荷载作用下钢筋混凝土结构耐久性寿命计算具有重要意义. |
| 关键词: 海洋环境 钢筋混凝土 氯离子 荷载 锈蚀速率 |
| DOI：10.11951/j.issn.1005-0299.20150603 |
| 分类号:TU528 |
| 基金项目:国家自然科学基金项目(51279128)；国家自然科学基金创新研究群体科学基金(51321065)；交通运输部交通建设科技项目(2013328224070). |
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| Calculation of concrete steel corrosion rate under the action of load |
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WANG Yuanzhan1,2,LIU Heng1,2,ZHOU Haifeng3,LIN Chenanpan4
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(1.National Key Laboratory of Water Conservancy Engineering Simulation and Security(Tianjin University), Tianjin 300072, China;2.Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Tianjin 300072, China; 3.Jiangsu Province Communications Planning and Design Institute Limited Company, Nanjing 210014, China; 4.CCCC-FHDI Engineering Co. Ltd., Guangzhou 510230, China)
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| Abstract: |
| To explore the effects of load on steel corrosion rate and structural durability, Chloride diffusion experiments under various load conditions were carried out in tidal zone and salt spray zone. The load sizes were 0 times, 0.3 times, 0.5 times the flexural strength. The steel corrosion experiments were conducted in concretes mixed with different concentrations of sodium chloride. The results of chloride diffusion experiments showed the relationship between chloride diffusion load coefficient and the load sizes. This could be applied to determine the chloride diffusion coeffients in Fick′s second law. The current density of steel corrosion as a function of time were measured in steel corrosion experiments. A model could be be fitted to represent the relationship among the current density, chloride content and time could. The steel corrosion rate in concretes under the action of load could be calculated by pluging the chloride diffusion model and considering loading factor into the steel corrosion model. This method is important to calculate reinforced concrete structure durability under the action of load in marine environment. |
| Key words: marine environment reinforced concrete chloride load corrosion rate |
