The dynamic Shear Rheometer (DSR) test is a standard method used to characterize the rheological properties of bitumen binders. Prior research substantiates the belief that, given that measured results are dependent on the rheometer gap size, currently recommended rheometer gap sizes (1 mm/2mm) cannot represent the mechanical properties of bitumen in asphalt mixtures. This study focused on the effect of gap size on the rheological property of bitumen binders. To this end, three bitumen binders were measured at different rheometer gap sizes (10 ~ 1000 μm). Subsequently, the rheological properties, including the complex modulus, phase angle, master curve, black diagram, were discussed. The results indicated that the measured rheological properties of bitumen binders are related to the testing gap size. In particular, as the gap size decreases, the complex modulus tends to decrease. Due to the presence of modifiers, the effect of the rheometer gap size also depends on the type of bitumen. The selective adsorption and colloidal theories were introduced to understand the effect of gap size. Additionally, a mathematical relationship called Temperature-Gap Superposition Principle (TGSP) was proposed to establish the relationship between the measured complex moduli in the standard state and the thin state.

动态剪切流变仪（DSR）测试是用于表征沥青粘合剂流变特性的标准方法。先前的研究证实了这样的观点，即鉴于测量结果取决于流变仪间隙尺寸，目前推荐的流变仪间隙尺寸（1 mm / 2mm）不能代表沥青混合料中沥青的机械性能。这项研究的重点是间隙尺寸对沥青粘合剂流变性能的影响。为此，在不同的流变仪间隙尺寸（10〜1000μm）下测量了三种沥青粘合剂。随后，讨论了流变性质，包括复数模量，相角，主曲线，黑色图。结果表明，沥青粘结剂的流变性能与测试间隙尺寸有关。特别是随着间隙尺寸的减小，复数模量趋于降低。由于存在改性剂，流变仪间隙尺寸的影响还取决于沥青的类型。介绍了选择性吸附和胶体理论以了解间隙尺寸的影响。另外，提出了一种称为温度间隙叠加原理（TGSP）的数学关系，以建立标准状态和薄状态下测得的复模量之间的关系。