摘要
氯离子侵蚀是导致海洋环境和盐碱地区混凝土服役寿命缩短的主要原因之一,同时骨料作为混凝土中体积占比最大的原材料,也是影响氯离子在混凝土内部传输的主要因素。为了顺应环境保护和可持续发展的需求,人造轻骨料和再生骨料已广泛运用于混凝土结构。轻骨料轻质多孔的特性及再生骨料较为复杂的界面区结构,使得二者对氯离子在混凝土中传输的影响与传统骨料相比存在明显的差异。因此,开展骨料对混凝土中氯离子传输特性的影响研究显得尤为重要。讨论了骨料对氯离子传输特性的影响,总结了宏观和细观尺度下骨料影响氯离子传输的机理和研究中存在的问题,并展望了骨料对氯离子传输机理影响的研究方向。
Chloride ion erosion is one of the main reasons for shortening the service life of concrete in marine and saline environment.Aggregate,as the largest raw material in concrete in volume proportion,is the main factor affecting the transport of chloride ion in concrete.In order to meet the demands of environmental protection and sustainable development,artificial lightweight aggregate and recycled aggregate have been widely used in concrete structures.Owing to the porous nature of lightweight aggregate and the complex interfacial transition zone of recycled aggregate,the chloride transport behavior in concrete prepared with these aggregates is obviously differ from those made with traditional aggregate.Therefore,it is particularly important to study the influence of aggregate on the transport behavior of chloride ions in concrete.This paper reviews the influence of aggregate on the chloride ion transport behavior,and summarizes the influence mechanisms of aggregate on the chloride ion transport t macro-and meso-scale.Finally,the existing problems in the current research were analyzed and the research prospects on chloride ion transport were presented.
作者
张高展
王宇譞
杨军
张键
寇斌
丁庆军
ZHANG Gaozhan;WANG Yuxuan;YANG Jun;ZHANG Jian;KOU Bin;DING Qingjun(School of Materials and Chemical Engineering,Anhui Jianzhu University,Hefei 230601,China;Anhui Province Key Laboratory of Advanced Building Materials,Hefei 230022,China;Anhui Construction Engineering Building Materials Co.,Ltd.,Hefei 230001,China;Anhui Feitian New Material Technology Co.,Ltd.,Suzhou 234001,China;School of Materials Science and Engineering,Wuhan University of Technology,Wuhan,430070,China)
出处
《功能材料》
CAS
CSCD
北大核心
2022年第8期8036-8044,共9页
Journal of Functional Materials
基金
国家自然科学基金项目(U21A20149,51878003,U2006224)。
关键词
骨料
氯离子传输
宏观尺度
细观尺度
aggregate
chloride ion transport behavior
macro-scale
meso-scale
