1.1 本试验方法包括通过弯曲梁流变仪测定沥青粘合剂的弯曲蠕变刚度或柔度和m值。它适用于弯曲蠕变刚度值在20 MPa至1 GPa范围内（蠕变柔度值在50 nPa范围内）的材料 –1 至1 nPa –1 )并可用于未老化材料或使用老化程序（如试验方法）老化的材料 D2872 或练习 D6521 . 试验装置可在-36°C至0°C的温度范围内运行。 1.2 当按照本试验方法进行试验时，对于挠度大于4 mm或小于0.08 mm的试样，试验结果无效。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。 ====意义和用途====== 5.1 本试验的温度基于沥青结合料拟用于的地理区域内路面所经历的冬季温度。 5.2 根据本试验确定的弯曲蠕变刚度或弯曲蠕变柔度描述了在线性粘弹性响应范围内的试验温度下沥青结合料的低温应力应变时间响应。 5.3 沥青路面的低温热开裂性能与混合料中沥青粘合剂的蠕变刚度和m值有关。 5.4 根据规范，蠕变刚度和m值用作沥青粘合剂的基于性能的规范标准 D6373 .

1.1 This test method covers the determination of the flexural-creep stiffness or compliance and m-value of asphalt binders by means of a bending beam rheometer. It is applicable to material having flexural-creep stiffness values in the range of 20 MPa to 1 GPa (creep compliance values in the range of 50 nPa –1 to 1 nPa –1 ) and can be used with unaged material or with materials aged using aging procedures such as Test Method D2872 or Practice D6521 . The test apparatus may be operated within the temperature range from –36°C to 0°C. 1.2 Test results are not valid for test specimens that deflect more than 4 mm or less than 0.08 mm when tested in accordance with this test method. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 5.1 The temperatures for this test are based upon the winter temperature experienced by the pavement in the geographical area for which the asphalt binder is intended. 5.2 The flexural creep stiffness or flexural creep compliance, determined from this test, describes the low-temperature stress-strain-time response of asphalt binder at the test temperature within the range of linear viscoelastic response. 5.3 The low-temperature thermal cracking performance of asphalt pavements is related to the creep stiffness and the m-value of the asphalt binder contained in the mix. 5.4 The creep stiffness and the m-value are used as performance-based specification criteria for asphalt binders in accordance with Specification D6373 .