1.1 本试验方法包括在动态剪切流变仪（DSR）上使用扭转矩形几何结构测定沥青混合料的复合剪切模量。适用于复合剪切模量值大于1×10的沥青混合料 4. 在-40℃的温度范围内测试时，Pa °C至76 °C，频率为0.01至25 Hz和0.0005的应变 % 至0.1 %. 复合剪切模量的测定通常在20 °C至70 0.01℃ % 在覆盖0.01至10Hz的十个离散频率值下的应变。 根据这些数据，可以根据需要生成温度或频率主曲线。本试验方法旨在根据沥青混合料生产规范试验或质量控制的要求，确定沥青混合料的复合剪切模量。 1.2 本试验方法适用于实验室制备和压实的混合物、现场生产和实验室压实的混合物或现场岩芯，无论粘合剂类型或等级如何，也无论混合物中是否使用RAP。由于被测试样的几何形状，本试验方法不适用于打开- 级配或SMA混合物。已发现其适用于标称最大骨料尺寸为19mm或更小的密实级配混合料，无论是粗级配还是细级配。 1.3 由于尚未制定本标准的精度估计，因此测试方法仅用于研究和信息目的。因此，本标准不应用于采购材料的验收或拒收。 1.4 以国际单位制表示的值应视为标准值。本标准不包括其他测量单位。 1.5 本标准的文本引用了提供说明材料的注释和脚注。这些注释和脚注（不包括表和图中的注释和脚注）不应视为本标准的要求。 1.6 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 沥青混合料的复合剪切模量是材料的基本特性。临界温度下的试验结果（T 批评的 )用于某些混合物的规格。含较硬粘合剂的混合物、老化混合物、含较高细粉量的混合物（材料细于75 µ）和孔隙率较低的混合物的复合剪切模量值都比具有较低硬度粘合剂、未老化混合物、细粉含量较低和孔隙率较高的混合物更高。通常，在给定使用温度下具有较高复剪切模量值的混合物将比在相同温度下测试的具有较低复剪切模量的类似混合物显示出较低的永久变形值。 注2: 本标准产生的结果质量取决于执行程序的人员的能力以及所用设备的能力、校准和维护。符合规范标准的机构 第3666页 通常认为能够进行合格和客观的测试、取样、检验等。本标准的用户应注意遵守规范 第3666页 单独使用并不能完全确保可靠的结果。可靠的结果取决于许多因素；遵循规范的建议 第3666页 或一些类似的可接受准则提供了评估和控制这些因素的方法。

1.1 This test method covers the determination of the complex shear modulus of asphalt mixtures using torsion rectangular geometry on a dynamic shear rheometer (DSR). It is applicable to asphalt mixtures having complex shear modulus values greater than 1 × 10 4 Pa when tested over a range of temperatures from –40 °C to 76 °C at frequencies of 0.01 to 25 Hz and strains of 0.0005 % to 0.1 %. The determination of complex shear modulus is typically determined at 20 °C to 70 °C at 0.01 % strain at ten discrete frequency values covering 0.01 to 10 Hz. From these data, temperature or frequency master curves can be generated as required. This test method is intended for determining the complex shear modulus of asphalt mixtures as required for specification testing or quality control of asphalt mixture production. 1.2 This test method is appropriate for laboratory-prepared and compacted mixtures, field-produced and laboratory-compacted mixtures or field cores, regardless of binder type or grade and regardless of whether RAP is used in the mixture. Due to the geometry of the specimens being tested this test method is not applicable to open-graded or SMA mixtures. It has been found to be appropriate for dense-graded mixtures, whether coarse- or fine-graded, with 19 mm or smaller nominal maximum aggregate size. 1.3 Since a precision estimate for this standard has not been developed, the test method is to be used for research and informational purposes only. Therefore, this standard should not be used for acceptance or rejection of a material for purchasing purposes. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard. 1.6 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 The complex shear modulus of asphalt mixtures is a fundamental property of the material. Test results at critical temperatures (T critical ) are used for specifications for some mixes. Mixtures with stiffer binders, aged mixes, mixtures with higher amounts of fines (material finer than 75 µ), and mixtures with lower voids all tend to have higher complex shear modulus values than mixtures with less stiff binders, unaged mixes, mixtures with low levels of fines, and higher air voids. In general, mixtures with higher complex shear modulus values at a given service temperature will exhibit lower permanent deformation values than similar mixtures tested at the same temperature that have lower complex shear modulus values. Note 2: The quality of the results produced by this standard are dependent on the competence of the personnel performing the procedure and the capability, calibration, and maintenance of the equipment used. Agencies that meet the criteria of Specification D3666 are generally considered capable of competent and objective testing, sampling, inspection, etc. Users of this standard are cautioned that compliance with Specification D3666 alone does not completely ensure reliable results. Reliable results depend on many factors; following the suggestions of Specification D3666 or some similar acceptable guideline provides a means of evaluating and controlling some of those factors.