| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Research Progress of Chloride Corrosion Resistance of Concrete Exposed to Marine Tidal Environment Based on Similarity Theory |
| BAO Jiuwen1,2, ZHUANG Zhijie1, ZHANG Peng1, WEI Jianan1, GAO Song1, ZHAO Tiejun1
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1 School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China
2 State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China |
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Abstract With the implementation of maritime power strategy in China, the marine infrastructure engineering construction is unprecedented in scale, and the durability of concrete materials in the coastal environment has gradually attracted people's attention. Chloride ingress is the main factor to cause the deterioration of the durability of reinforced concrete structures in marine environment. Therefore, the experimental research on chloride ion corrosion of concrete in coastal environment has attracted wide attention. The real sea exposure test has some disadvantages, such as large regional impact, poor popularization, long test period and complex influencing factors, which could not provide sufficient data basis for developing prediction model of service life. However, the shortcomings of the real sea exposure test can be effectively made up by the indoor simulation accelerated test. The similarity between the real sea exposure test and the indoor simulation test is used to establish prediction model of service life for marine structures. Further, the indoor simulation test results could be applied to accurately predict the service life of building structure in the field. There have been many researches on the similarity of chloride corrosion resistance between the real sea exposure test and the indoor simulation accelerated test, and some achievements have been achieved. On the one hand, the corresponding similarity model has been established, and then the corrosion law of chloride ion in concrete under the real sea exposure environment and artificial simulation environment has been analyzed and studied theoretically, which lays a certain theoretical foundation for the establishment of the life prediction model. On the other hand, the testing equipment has already been continuously developed and upgraded, which provides a certain technical support for obtaining more accurate and reliable test data. For the tidal environment, some parameters including convective zone depth, surface chloride ion concentration, diffusion coefficient, and peak chloride ion concentration are usually regarded as the key factors for the prediction model of service life, which are considered to analyze the ingress behavior of chloride ions. From the perspective of the real sea exposure test and the indoor simulation test, the research progress of the resistance to chloride corrosion within concrete exposed to marine tidal zone has been summarized. Based on the similarity theory, the similarity of chloride penetration into concrete is analyzed in depth, and the further discussion and prospect are presented.
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Published: 22 April 2021
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| Fund:National Natural Science Foundation of China (51922052, U1706222, 51778309, 51908307, 51978353), Natural Science Foundation of Shandong Province (ZR2018JL018), First-class Discipline Project Funded by the Education Department of Shandong Province and Open Fund Projects of State Key Laboratory of Coastal and Offshore Engineering by Dalian University of Technology (LP1902). |
About author:: Jiuwen Baoreceived his Ph.D. degree in the major of structural engineering from Faculty of Infrastructure Engineering, Dalian University of Technology. He is currently an associate professor in the School of Civil Engineering, Qingdao University of Technology. His research interests are the durability of concrete exposed to marine environment. In recent years, more than twenty papers have been published in the field of concrete durability, including Journal of Materials in Civil Engineering (ASCE), Construction and Building Materials, Materials and Structures, Ocean Engineering, Journal of Building Materials and Journal of Hydraulic Engineering, etc.
Peng Zhangreceived his Ph.D. degree in the major of structural engineering from School of Civil Engineering, Qingdao University of Technology. He is currently a full professor, doctoral supervisor and associate dean of the School of Civil Engineering. He has gained the project of outstanding youth from National Science Foundation and Humboldt scholar of German. His research interests are testing technology of civil engineering mate-rials, new building materials, durability of concrete, etc. In recent years, more than fifty papers have been published in the field of concrete durability, including some journals of Cement and Concrete Research, Cement and Concrete Composites, Construction and Building Mate-rials, Materials Reports and Journal of Hydraulic Engineering, etc.
Tiejun Zhaoreceived his Ph.D. degree in the major of building materials from Tsinghua University in 1997. He is currently a full professor, doctoral supervisor and the President of Qingdao University of Technology, and the leader of “111 plan” project of institutions of higher learning subject innovation and intelligence base. His research interests are concrete materials and their performance, etc. He has presided key projects of the National Natural Science Foundation of China, key international cooperation projects, 973 program projects, and presided the Jiaozhou Bay Undersea Tunnel, Qingdao Subway, etc. More than papers, monographs and standards have been published in the field of concrete mate-rials. He has gained nearly 10 science and technology awards, including Second prize of National Science and Technology progress award. |
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2021, Vol. 35 
