To assess the resistance of asphalt mixes to permanent deformations, the wheel tracking tests are frequently used, what requires specialized equipment as well as relatively large size samples. For this reason, researchers are seeking for a more simple test that will help to assess the rut resistance of asphalt mixes. According to Christensen and Bonaquist as well as Zaniewski and Srinivasan, this may be the indirect tensile strength (ITS) test. Therefore, this research experimentally examined the relationship of ITS results on rutting parameters, i.e. proportional rut depth (PRD_AIR) and wheel tracking speed (WTS_AIR). The samples of asphalt concrete (AC), as well as SMA and BBTM, were compacted with the Marshall hammer, but ITS tests were conducted with a typical Marshall press, at a loading rate of 50 mm/min. The test results indicated the need for separate analysis of continuous type mixtures (AC) and gap-graded mixtures (SMA and BBTM). The relationship of ITS results with rutting parameters depends on: the type of mixture gradation (higher correlation coefficients were obtained for gap-graded mixtures) and ITS test temperatures (test results at 40°C achieved better correlations than those obtained at 25°C). Using the regression analyses, the prediction limits as well as confidence limits were calculated, which allowed to develop criteria for classifications of asphalt mixture resistance to rutting categories, on the basis of ITS test.

为了评估沥青混合料对永久变形的抵抗力，经常使用车轮跟踪测试，这需要专门的设备以及相对较大尺寸的样品。出于这个原因，研究人员正在寻求一种更简单的测试，以帮助评估沥青混合料的抗车辙性。根据 Christensen 和 Bonaquist 以及 Zaniewski 和 Srinivasan 的说法，这可能是间接拉伸强度 (ITS) 测试。因此，本研究通过实验检验了 ITS 结果与车辙参数的关系，即比例车辙深度 (PRD _AIR ) 和车轮跟踪速度 (WTS _AIR)）。沥青混凝土 (AC) 以及 SMA 和 BBTM 样品用马歇尔锤压实，但 ITS 测试是用典型的马歇尔压机以 50 毫米/分钟的加载速率进行的。测试结果表明需要对连续型混合物 (AC) 和间隙级混合物 (SMA 和 BBTM) 进行单独分析。ITS 结果与车辙参数的关系取决于：混合料级配的类型（间隙级配混合料获得更高的相关系数）和 ITS 测试温度（40°C 下的测试结果比 25°C 下获得的相关性更好） . 使用回归分析，计算了预测限和置信限，从而可以在 ITS 测试的基础上制定沥青混合料抗车辙类别的分类标准。