摘要
随着我国“海洋强国”战略的实施,海洋工程结构基础设施建设规模空前,滨海环境下混凝土材料耐久性问题也逐渐引起人们的重视。氯离子侵蚀是导致海洋环境下钢筋混凝土结构耐久性能劣化的主要因素,因此,针对滨海环境下钢筋混凝土中氯离子侵蚀规律的试验研究引起了广泛关注。实海暴露试验存在受区域影响较大、推广性差、试验周期长和影响因素复杂等缺点,不能为寿命预测模型建立提供充足的数据基础,而室内模拟加速试验可有效弥补实海暴露试验的不足。以实海暴露试验为依据,通过研究二者之间的相似性,构建实际海洋工程结构的寿命预测模型,进而将室内模拟试验结果应用到现场实际情况中,可准确地实现海洋环境下基础设施建筑结构服役寿命的预测。目前,学者们已对海洋潮汐区环境混凝土抗氯盐侵蚀性能的实海暴露试验与室内模拟加速试验开展了大量的研究,并取得了丰富的成果。一方面,建立了相应的相似性模型,进而从理论方面分析实海暴露环境和人工模拟环境下混凝土中氯离子的侵蚀规律,为寿命预测模型的建立奠定理论基础;另一方面,试验设备得到不断的研发升级,为获取更加准确可靠的试验数据提供了一定技术支持。针对海洋潮汐区环境条件,对流区深度、表面氯离子浓度、扩散系数和氯离子浓度峰值等参数是建立寿命预测模型的关键要素,本文主要考虑这几方面的影响,分析总结了实海暴露环境下氯离子侵蚀规律,从实海暴露试验与室内模拟试验的角度出发,总结了海洋潮汐区环境混凝土抗氯盐侵蚀性能的研究进展,基于相似性理论分析探讨了氯盐侵蚀规律的相似性,并进行了讨论和展望。
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.
作者
鲍玖文
庄智杰
张鹏
魏佳楠
高嵩
赵铁军
BAO Jiuwen;ZHUANG Zhijie;ZHANG Peng;WEI Jianan;GAO Song;ZHAO Tiejun(School of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China;State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2021年第7期7087-7095,共9页
Materials Reports
基金
国家自然科学基金(51922052,U1706222,51778309,51908307,51978353)
山东省自然科学基金(ZR2018JL018)
大连理工大学海岸和近海工程国家重点实验室开放课题基金资助项目(LP1902)。
关键词
海洋潮汐区环境
实海暴露
室内模拟
相似性
氯离子侵蚀
marine tidal environment
real sea exposure
indoor simulation
similarity
chloride ion erosion
作者简介
鲍玖文,青岛理工大学土木工程学院副教授。2018年6月在大连理工大学建设工程学部结构工程专业取得博士学位。主要从事海工混凝土耐久性方面的研究工作。近年来,在混凝土材料耐久性领域发表论文20余篇,包括Journal of Materials in Civil Engineering(ASCE)、Construction and Building Materials、Materials and Structures、Ocean Engineering、《建筑材料学报》和《水利学报》等期刊;张鹏,青岛理工大学土木工程学院副院长、教授、博士研究生导师。国家优秀青年科学基金获得者,德国“洪堡学者”,从事土木工程材料测试技术、新型建筑材料、混凝土耐久性等领域研究工作。近年来,在混凝土材料耐久性领域发表论文50余篇,包括Cement and Concrete Research、Cement and Concrete Composites、Construction and Building Materials、《材料导报》和《水利学报》等期刊,peng.zhang@qut.edu.cn;赵铁军,青岛理工大学副教长、教授、博士研究生导师。“111计划”项目(高等学校学科创新引智基地)负责人。主要从事混凝土材料与性能研究,主持包括国家自然科学基金重点项目、重点国际合作项目、973计划课题等国家级重大课题。主持胶州湾海底隧道、青岛地铁等重大工程项目研究。发表论文100余篇,出版专著6部,主、参编国家和行业标准10余部,获国家科技进步二等奖等科技奖励近10项。
