面向结构部位的铁路混凝土结构耐久性研究
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摘要
基于多种腐蚀离子共存海洋腐蚀环境下的混凝土结构腐蚀机理,研制耐强腐蚀海洋环境混凝土。结合其结构特点与现实问题,对海南环岛高铁西段铁路桥梁混凝土腐蚀环境进行测试并对其作用等级分级。解释多种腐蚀离子共存海洋腐蚀环境下的混凝土结构腐蚀机理,提出该特殊工况下的混凝土耐久性评价指标体系。针对高温高湿强腐蚀海洋环境混凝土结构提出耐久性提升技术,确定面向结构部位高温高湿强腐蚀海洋环境混凝土结构防腐蚀强化措施。
Based on corrosion mechanism of concrete structures in severe marine environment, durable concrete has been developed. Combined with concrete structural characteristics and practical issues, the concrete corrosion environment of the railway bridge in the western section of the high-speed railway around Hainan was studied and graded. The corrosion mechanism of concrete structures under multiple corrosive ions has been illustrated,accordingly, the concrete durability evaluation indexes has been proposed. In view of high temperature, high humidity and strong corrosion of marine environment concrete structure, the technical measures for durability improvement for concrete structures have been proposed.
Based on corrosion mechanism of concrete structures in severe marine environment, durable concrete has been developed. Combined with concrete structural characteristics and practical issues, the concrete corrosion environment of the railway bridge in the western section of the high-speed railway around Hainan was studied and graded. The corrosion mechanism of concrete structures under multiple corrosive ions has been illustrated,accordingly, the concrete durability evaluation indexes has been proposed. In view of high temperature, high humidity and strong corrosion of marine environment concrete structure, the technical measures for durability improvement for concrete structures have been proposed.
引文
[1]李雁.海洋腐蚀与冻融环境下掺合料混凝土物理力学性能及损伤机理研究[D].徐州:中国矿业大学,2015.LI Yan.Study on the physical and mechanical properties and damage mechanism of concrete mixed with mineral admixture in marine corrosion and freezing-thawing environment[D].Xuzhou:China University of Mining and Technology,2015.
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[7]陈红莉.干湿循环下混凝土受硫酸盐腐蚀断裂性能试验研究[D].郑州:郑州大学,2016.CHEN Hongli.Experimental study on cracking behavior of concrete subjected to sulphate corrosion under dry and wet cycling[D].Zhengzhou:Zhengzhou University,2016.
[8]杨鲁,李化建,谢永江,等.高速铁路灌注桩混凝土工作性能评价指标研究[J].混凝土,2012(1):116-118.YANG Lu,LI Huajian,XIE Yongjiang,et al.Study on evaluation index of concrete performance of high speed railway cast-in-place pile[J].Concrete,2012(1):116-118.
[9]张巨松,杨秋雨,董建国.粉煤灰加气混凝土复掺外加剂和矿渣的性能研究[J].沈阳建筑大学学报(自然科学版),2017,33(3):483-489.ZHANG Jusong,YANG Qiuyu,DONG Jianguo.Study on the properties of fly ash aerated concrete admixture and slag[J].Journal of Shenyang Jianzhu University(Natural Science Edition),2017,33(3):483-489.
[10]李斌,高生,路兰.防腐阻锈剂和矿物掺合料对复合胶凝材料性能与水化特性的影响[J].硅酸盐通报,2018,37(5):1595-1599.LI Bin,GAO Sheng,LU Lan.Effects of anticorrosive corrosion inhibitor and mineral admixture on properties and hydration properties of composite cementitious materials[J].Silicate Bulletin,2018,37(5):1595-1599.
[11]温晓海.高耐久性混凝土的开发及成本分析[J].科学时代,2013(8):1-9.WEN Xiaohai.Development and cost analysis of high durability concrete[J].Scientific Age,2013(8):1-9.
[12]Alberti M G,Enfedaque A,Gálvez J C.Fibre reinforced concrete with a combination of polyolefin and steelhooked fibres[J].Composite Structures,2017,171:317-325.
[13]刘志洁.既有结构混凝土表面强化材料耐久性试验研究[D].南京:南京航空航天大学,2016.LIU Zhijie.Experimental research on durability of surface strengthening materials applied in existing concrete structure[D].Nanjing:Nanjing University of Aeronautics and Astronautics,2016.
[2]Boddy A,Bentz E,Thomas M D A,et al.An overview and sensitivity study of a multimechanistic chloride transport model-effect of fly ash and slag[J].Cement&Concrete Research,1999,29(29):827-837.
[3]WEN X,JU C,FEI X,et al.Corrosion development of carbon steel grids and shear connectors in cracked composite beams exposed to wet-dry cycles in chloride environment[J].Materials,2018,11(4):479-496.
[4]杨礼明.高性能混凝土的化学腐蚀、盐结晶和应力腐蚀及其微结构演变规律[D].南京:南京航空航天大学,2013.YANG Liming.Chemical attack,salt crystallization and stress attack to high performance concrete and the microstructure evolution during corrosion process[D].Nanjing:Nanjing University of Aeronautics and Astronautics,2013.
[5]高润东.复杂环境下混凝土硫酸盐侵蚀微-宏观劣化规律研究[D].北京:清华大学,2010.GAO Rundong.Micro-macro degradation regularity of sulfate attack on concrete under complex environments[D].Beijing:Tsinghua University,2010.
[6]邱林峰.硫酸盐-氯盐环境下钢筋混凝土腐蚀过程的实验研究[D].南京:南京理工大学,2017.QIU Linfeng.Experimental study on corrosion process of reinforced concrete in sulfate chloride environment[D].Nanjing:Nanjing University of Science and Technology,2017.
[7]陈红莉.干湿循环下混凝土受硫酸盐腐蚀断裂性能试验研究[D].郑州:郑州大学,2016.CHEN Hongli.Experimental study on cracking behavior of concrete subjected to sulphate corrosion under dry and wet cycling[D].Zhengzhou:Zhengzhou University,2016.
[8]杨鲁,李化建,谢永江,等.高速铁路灌注桩混凝土工作性能评价指标研究[J].混凝土,2012(1):116-118.YANG Lu,LI Huajian,XIE Yongjiang,et al.Study on evaluation index of concrete performance of high speed railway cast-in-place pile[J].Concrete,2012(1):116-118.
[9]张巨松,杨秋雨,董建国.粉煤灰加气混凝土复掺外加剂和矿渣的性能研究[J].沈阳建筑大学学报(自然科学版),2017,33(3):483-489.ZHANG Jusong,YANG Qiuyu,DONG Jianguo.Study on the properties of fly ash aerated concrete admixture and slag[J].Journal of Shenyang Jianzhu University(Natural Science Edition),2017,33(3):483-489.
[10]李斌,高生,路兰.防腐阻锈剂和矿物掺合料对复合胶凝材料性能与水化特性的影响[J].硅酸盐通报,2018,37(5):1595-1599.LI Bin,GAO Sheng,LU Lan.Effects of anticorrosive corrosion inhibitor and mineral admixture on properties and hydration properties of composite cementitious materials[J].Silicate Bulletin,2018,37(5):1595-1599.
[11]温晓海.高耐久性混凝土的开发及成本分析[J].科学时代,2013(8):1-9.WEN Xiaohai.Development and cost analysis of high durability concrete[J].Scientific Age,2013(8):1-9.
[12]Alberti M G,Enfedaque A,Gálvez J C.Fibre reinforced concrete with a combination of polyolefin and steelhooked fibres[J].Composite Structures,2017,171:317-325.
[13]刘志洁.既有结构混凝土表面强化材料耐久性试验研究[D].南京:南京航空航天大学,2016.LIU Zhijie.Experimental research on durability of surface strengthening materials applied in existing concrete structure[D].Nanjing:Nanjing University of Aeronautics and Astronautics,2016.