There has been an increasing interest in the field of rehabilitation, mainly for repair and strengthening of reinforced concrete (RC) structures. One of the most effective techniques comprises externally bonded concrete composites, in which the efficacy of rehabilitation depends considerably on the integrity and durability of the bond established between the overlaying and the substrate concrete. This paper presents a detailed review of the critical durability issues associated with the structural bond for rehabilitation purposes, with a special focus on the performance of modern overlay materials such as ultra-high performance concrete (UHPC) and Engineered Cementitious Composites (ECC). A number of factors determining the durability of concrete-concrete bonded joints have been identified and grouped into two categories related to materials – joint characteristics and in-service conditions. For each of these factors, the main findings obtained in previous studies are summarized and discussed and the aspects that need further investigation are outlined.

人们对修复领域越来越感兴趣，主要用于钢筋混凝土 (RC) 结构的修复和加固。最有效的技术之一包括外部粘合混凝土复合材料，其中修复的功效在很大程度上取决于覆盖层和基材混凝土之间建立的粘合的完整性和耐久性。本文详细介绍了与用于修复目的的结构粘合相关的关键耐久性问题，特别关注现代覆盖材料的性能，例如超高性能混凝土 (UHPC) 和工程水泥基复合材料 (ECC)。已经确定了许多决定混凝土-混凝土粘结接头耐久性的因素，并将其分为与材料相关的两类——接头特性和使用条件。对于这些因素中的每一个，总结和讨论了先前研究中获得的主要发现，并概述了需要进一步调查的方面。