The adhesion failure of the interface between concrete and rendering mortars often leads to the degradation of the reinforced concrete building envelopes. Although several methods to improve the adhesion properties between concrete and rendering mortar have been proposed, there is no system to evaluate the effectiveness of these methods from the perspective of durability. To this end, this study proposed an experimental method to evaluate the durability of rendering mortar and concrete adhesion systems at the laboratory level. In this technique, a cyclic thermal load is applied to a part of the rendering mortar surface to accelerate the degradation; this part represents an external wall subjected to solar radiation. Subsequently, appropriate constraints are applied to the loaded part of the mortar to reproduce the actual degradation mechanism. Numerical simulation and experimental results support the effectiveness of the proposed accelerated degradation method. Considering the rate of decrease in the bond strength as a criterion to evaluate the durability, the influence of several known factors on the durability can be explicitly ranked. The durability assessment method can facilitate the comparison of novel solutions during the development stage.

混凝土与抹灰砂浆之间的界面的粘合失败通常会导致钢筋混凝土建筑围护结构的退化。尽管已经提出了几种改善混凝土与抹灰砂浆之间粘结性能的方法，但是还没有系统从耐久性的角度评估这些方法的有效性。为此，这项研究提出了一种在实验室水平上评估抹灰砂浆和混凝土粘结体系耐久性的实验方法。在这种技术中，周期性的热负荷被施加到抹灰砂浆表面的一部分上以加速降解。该部分表示受到太阳辐射的外壁。随后，对砂浆的加载部分施加适当的约束，以重现实际的降解机理。数值模拟和实验结果证明了所提加速降解方法的有效性。考虑到粘合强度的降低速率作为评估耐久性的标准，可以明确地列出几种已知因素对耐久性的影响。耐久性评估方法可以在开发阶段促进新型解决方案的比较。