The degree of adherence between two bituminous layers can be assessed from shear tests carried out at constant displacement speed, which allow the shear strength and stiffness of the interface to be obtained, being usual to specify a minimum strength. But stronger bonds will be more stressed, which could negatively affect their fatigue behaviour. In this work, the shear fatigue behaviour of two interfaces of different stiffness has been analysed, based on a cyclic compression test, performed at controlled stress, using the test device B described in the NLT-382 standard, included in the draft of the European pre-norm prEN 12697-48. From these tests, fatigue laws for each type of interface have been obtained. These laws, combined with a calculation method developed by the authors, have made it possible to obtain the number of cycles that each interface would withstand, under certain load hypotheses.

可以从在恒定位移速度下进行的剪切测试中评估两个沥青层之间的附着程度，这可以得到通常指定最小强度的剪切强度和界面刚度。但是，更牢固的结合会受到更大的压力，这可能会对他们的疲劳行为产生负面影响。在这项工作中，使用了包含在欧洲草案中的NLT-382标准中所述的测试装置B，基于在受控应力下进行的循环压缩测试，分析了不同刚度的两个界面的剪切疲劳行为。预规范prEN 12697-48。从这些测试中，已经获得了每种界面类型的疲劳定律。这些定律，结合作者开发的计算方法，