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Preparation and Performance Analysis of High-Viscosity and Elastic Recovery Modified Asphalt Binder

机译：高粘度和弹性回收改性沥青粘合剂的制备与性能分析

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摘要

This study presented the preparation and performance of a kind of high viscosity and elastic recovery asphalt (HVERA) by using some modifiers. The performance of styrene-butadiene-styrene (SBS), rock asphalt (RA), crumb rubber (CR), and stabilizing agent (SA) for different modifiers was investigated by conventional binder test. Effects of modifiers on the high- and low-temperature properties of HVERA were investigated. The dynamic viscosity (DV) test, dynamic shear rheometer (DSR), and bending beam rheometer (BBR) analysis indicated that the high- and low-temperature rheological properties of asphalt were improved attribute to the addition of mixture of modifiers. Meanwhile, the short-term aging and long-term aging were simulated by rolling thin film oven (RTFO) and pressure aging vessel (PAV) tests. Furthermore, the Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM) measurements were conducted for obtaining the mechanism and microstructure distribution of the modified asphalt binders. From the test results in this study, it was evident that the addition of SBS, RA, CR, and SA into a neat asphalt binder could both significantly improve the viscosity of the binder at high temperature and lower the creep stiffness at low temperature, which was beneficial to better both high-temperature stability and low-temperature cracking resistance of asphalt pavements. It was proved that the high temperature grade of HVERA could be increased by increasing of RA and a proper percentage of modifiers could be improved by the low temperature grade of HVERA.
机译：本研究通过使用一些改性剂介绍了一种高粘度和弹性回收沥青（HVERA）的制备和性能。通过常规的粘合剂试验研究了苯乙烯 - 丁二烯 - 苯乙烯（SBS），岩石沥青（Ra），岩石沥青（Ra），碎屑橡胶（Cr）和稳定剂（SA）。调节剂对Hmera的高温和低温性质的影响。动态粘度（DV）试验，动态剪切流变仪（DSR）和弯曲光束流变仪（BBR）分析表明，沥青的高温和低温流变性质得到了加入改性剂混合的属性。同时，通过滚动薄膜烘箱（RTFO）和压力老化容器（PAV）测试来模拟短期老化和长期老化。此外，进行了傅里叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）测量以获得改性沥青粘合剂的机构和微观结构分布。从该研究中的测试结果来看，显而易见的是，将SBS，Ra，Cr和Sa加入整齐的沥青粘合剂中，可以在高温下显着改善粘合剂的粘度，并降低低温下的蠕变刚度，有利于更好的沥青路面的高温稳定性和低温开裂性。事实证明，通过增加Ra的增加，通过增加Ra增加HVERA的高温等级可以通过HVERA的低温等级来提高适当百分比的改性剂。

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  • 来源
    《Advances in civil engineering》 |2019年第16期|6070685.1-6070685.16|共16页
  • 作者

    Qu Liangchen; Gao Yingli; Yao Hui; Cao Dandan; Pei Ganpeng; He Bei; Duan Kairui; Zhou Wenjuan;

  • 作者单位

    Changsha Univ Sci & Technol Sch Traff & Transportat Engn Changsha 410114 Hunan Peoples R China;

    Changsha Univ Sci & Technol Sch Traff & Transportat Engn Changsha 410114 Hunan Peoples R China;

    Beijing Univ Technol Beijing Key Lab Traff Engn Coll Metropolitan Transportat 100 Pingleyuan Beijing 100124 Peoples R China;

    Beijing Univ Technol Beijing Key Lab Traff Engn Coll Metropolitan Transportat 100 Pingleyuan Beijing 100124 Peoples R China;

    Changsha Univ Sci & Technol Sch Traff & Transportat Engn Changsha 410114 Hunan Peoples R China;

    Changsha Univ Sci & Technol Sch Traff & Transportat Engn Changsha 410114 Hunan Peoples R China;

    Changsha Univ Sci & Technol Sch Traff & Transportat Engn Changsha 410114 Hunan Peoples R China;

    Changsha Univ Sci & Technol Sch Traff & Transportat Engn Changsha 410114 Hunan Peoples R China;

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