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首页> 外文会议>6th International RILEM Symposium on Performance Testing and Evaluation of Bituminous Materials, (PTEBM'03) Pt.1 Apr 14-16, 2003 Zurich, Switzerland >RHEOLOGICAL CHARACTERIZATION OF BITUMINOUS BINDER TO PREDICT PAVEMENT RUTTING
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RHEOLOGICAL CHARACTERIZATION OF BITUMINOUS BINDER TO PREDICT PAVEMENT RUTTING

机译：粘合剂的流变特性预测路面裂缝。

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摘要

The original Superpave bituminous binder specification to warrant against rutting was based on G~*/sinδas measured in the dynamic shear rheometer (DSR) at the upper pavement temperature. Recent research has suggested a repeated creep test conducted in rotational shear with the DSR as a more appropriate specification test for grading PG binders at the upper grading temperature. On the other hand, zero shear viscosity (ZSV) has been proposed as a potential specification criterion in Europe. Data obtained from the static creep and recovery test or from a DSR frequency sweep can be used to estimate ZSV. Different binders consisting of common base bitumens and different modifiers with varying levels of modification were tested using repeated shear, static creep and recovery, and DSR frequency sweeps over a range of test temperatures and stress levels. Different materials exhibited different responses in repeated shear and these responses are discussed with respect to the amount and type of modifier. Different types of structuring appear to occur in the binders and this structuring, which is different for plastomers and elastomers, can affect the response of the binder to repeated shear. The nature of the recovery is evaluated with respect to modifier type and dosage level. Finally, the utility and accuracy of ZSV as determined from dynamic and static creep testing is discussed. Comparisons between the different parameters are evaluated and their relevancy as specification parameters is discussed.
机译：最初的Superpave沥青粘合剂规格可确保车辙，它是基于G〜* /sinδ值的，该值是在动态剪切流变仪（DSR）中在较高的路面温度下测量的。最近的研究表明，在较高剪切温度下对PG粘合剂进行分级时，采用DSR在旋转剪切中进行重复蠕变试验是更合适的规格测试。另一方面，在欧洲已经提出零剪切粘度（ZSV）作为潜在的规范标准。从静态蠕变和恢复测试或DSR频率扫描获得的数据可用于估计ZSV。使用重复剪切，静态蠕变和回复率以及DSR频率扫描在一系列测试温度和应力水平下测试了由普通基础沥青和不同改性水平的不同改性剂组成的不同粘结剂。不同的材料在反复剪切中表现出不同的响应，并就改性剂的量和类型讨论了这些响应。粘合剂中似乎发生了不同类型的结构化，这种结构对于塑性体和弹性体而言是不同的，会影响粘合剂对重复剪切的响应。相对于改性剂类型和剂量水平评估回收的性质。最后，讨论了由动态和静态蠕变测试确定的ZSV的实用性和准确性。评估了不同参数之间的比较，并讨论了它们与规格参数的相关性。

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