Rheological properties of polymer modified bitumen from long-term field tests
Rheological properties of polymer modified bitumen from long-term field tests
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DOI：
10.1016/j.fuel.2006.09.030
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发表时间：
2007-05-01
期刊：
影响因子：
7.4
通讯作者：
Mazza, E.
中科院分区：
文献类型：
--
作者：
Valtorta, D.;Poulikakos, L. D.;Mazza, E.
在典型的环境条件下，直接在操作现场监测路面和沥青粘合剂老化的可能性有助于更好地了解影响老化过程的因素，可用于材料优化和改善沥青粘合剂的性能。本文介绍的高频扭转流变仪（HFTR）是一种研究现场试验过程中沥青胶结料流变性能随时间变化的有效装置。与目前流行的流变仪相比，HFTR价格便宜，并且由于其便携性和工作频率（5 kHz），使测量不受交通引起的低频影响，是现场测试连续监测的有用工具。本文介绍了HFTR装置和测量技术。从实验中提取的流变参数是通过分析和有限元模型，再现现场测试的特定条件。在这项研究中，长期老化的沥青塞接头的公路桥梁进行了调查与HFTR超过三年的连续暴露于环境条件。塞缝材料的流变性能的演变，含有苯乙烯-丁二烯-苯乙烯聚合物改性沥青，量化的复杂的剪切模量G* 方面，表现出渐进的材料硬化和增加的粘结剂的温度敏感性。(c)2006爱思唯尔有限公司保留所有权利。
The possibility to monitor aging of pavements and bituminous binders directly on the operative field, under their typical environmental conditions, can contribute to better understand the factors influencing the aging process, can be used for material optimization and to improve the performance behavior of bituminous binders. The high frequency torsional rheometer (HFTR) described in this paper is a useful device to study the time evolution of the theological properties of bituminous binders during field tests. In comparison with prevailing rheometers, the HFTR is inexpensive and, due to its portability and operative frequency (5 kHz) that allows measurements to be unaffected by traffic induced low frequencies, is a useful tool for continuous monitoring of field tests. The HFTR device and the measurement technique are described in this paper. The extraction of the theological parameters from the experiments is made through analytical and finite element models that reproduce the particular conditions of the field tests. In this study, the long-term aging of an asphaltic plug joint of a highway bridge is investigated with an HFTR over three consecutive years of exposure to environmental conditions. The evolution of the theological properties of the plug joint material, containing styrene-butadiene-styrene polymer modified bitumen, is quantified in terms of the complex shear modulus G*, showing a progressive material hardening and an increase in the temperature susceptibility of the binder. (c) 2006 Elsevier Ltd. All rights reserved.