It is a challenge to isolate the ITZ effect on the mass transport from several concurrent factors. This study designed a systematical experimental work to assess the relatively importance of ITZ to gas permeability, capillary water absorption and chloride migration, considering the effect of preconditioning regime, aggregate volume content and size. The ratio of mass transport between ITZ and bulk cement matrix was given against ITZ thickness. Besides the dilution and tortuosity, factors such as densification of bulk cement matrix, bleeding along coarse aggregate should also be considered in the analysis of ITZ effect. The densification effect and ITZ effect would be more prominent with a higher aggregate content or finer aggregate size. The sorptivity is less while chloride migration is more sensitive to the variation of ITZ. The cracks due to precondition could mislead the analyzing ITZ effect, which is also dependent on the type of transport. This study is expected to offer more insight into the effect of certain components on the performance of concrete.

从几个并发因素中分离出 ITZ 对质量传输的影响是一个挑战。本研究设计了一项系统的实验工作，以评估 ITZ 对气体渗透性、毛细管吸水率和氯化物迁移的相对重要性，考虑到预处理制度、骨料体积含量和尺寸的影响。ITZ 和散装水泥基体之间的质量传输比针对 ITZ 厚度给出。在分析ITZ效应时，除稀释和曲折外，散装水泥基体致密化、沿粗骨料泌水等因素也应考虑在内。集料含量越高或集料粒度越细，致密化效应和ITZ效应越显着。吸附性较小，而氯化物迁移对 ITZ 的变化更敏感。由于前提条件造成的裂缝可能会误导分析 ITZ 效应，这也取决于运输类型。预计这项研究将提供对某些成分对混凝土性能影响的更多见解。