骨料对混凝土中氯离子传输特性的影响进展.

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. [ABSTRACT FROM AUTHOR]