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首页> 外文期刊>Construction and Building Materials >Influence of polymer modification on asphalt binder dynamic and steady flow viscosities
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Influence of polymer modification on asphalt binder dynamic and steady flow viscosities

机译：聚合物改性对沥青结合料动态和稳态流动粘度的影响

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摘要

Asphalt pavement performance such as rutting, crack initiation and propagation as well as fatigue behaviour are substantially affected by the rheological properties of the bitumen. In this sense, the use of polymer modification in road paving applications has been growing rapidly over the last decade as it allows significant enhancements in bitumen properties with consequent improvement in road service life. In fact, the use of polymer modified bitumens (PMBs) leads to pavements characterized by higher resistance to rutting and thermal cracking and lower fatigue damage, stripping and thermal susceptibility. This paper presents a laboratory investigation concerning the effect of polymer modification on the flow behaviour of bitumens. Two different polymers, an elastomer and a plastomer, were used as bitumen modifying agents at three different percentages (2%, 4% and 6% by bitumen weight). Oscillatory mechanical analysis as well as viscosity measurements under steady state conditions were performed taking into account different testing parameters such as temperature, loading frequency and shear rate. The results confirm that the rheological properties of PMBs are strongly influenced by polymer nature and polymer content. The bitumen viscosity on the dynamic domain was combined with that in the steady-state domain, confirming the applicability of the Cox-Merz relationship for the plain bitumen and the PMBs with low polymer content. Finally, the Cross and the Carreau models were found to be suitable to fit the steady state and the dynamic results in order to determine the viscosity function of the investigated bitumens.
机译：沥青路面的性能，例如车辙，裂纹萌生和扩展以及疲劳行为，都受到沥青流变特性的显着影响。从这个意义上讲，在过去的十年中，聚合物改性在道路铺设应用中的使用迅速增长，因为它可以显着提高沥青的性能，从而改善道路使用寿命。实际上，使用聚合物改性的沥青（PMB）会导致路面具有较高的耐车辙和抗热裂性，并降低疲劳损伤，剥离和热敏感性。本文介绍了有关聚合物改性对沥青流动行为影响的实验室研究。两种不同的聚合物（弹性体和塑性体）以三种不同的百分比（沥青重量的2％，4％和6％）用作沥青改性剂。考虑到不同的测试参数（例如温度，加载频率和剪切速率），在稳态条件下进行了振动机械分析以及粘度测量。结果证实，PMB的流变性质受到聚合物性质和聚合物含量的强烈影响。动态域中的沥青粘度与稳态域中的沥青粘度相结合，证实了Cox-Merz关系对于普通沥青和聚合物含量低的PMB的适用性。最后，发现Cross和Carreau模型适合拟合稳态和动态结果，以便确定所研究沥青的粘度函数。

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  • 来源
    《Construction and Building Materials》 |2014年第30期|435-443|共9页
  • 作者

    F. Cardone; G. Ferrotti; F. Frigio; F. Canestrari;

  • 作者单位

    Department of Civil and Building Engineering and Architecture, Universita Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy;

    Department of Civil and Building Engineering and Architecture, Universita Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy;

    Department of Civil and Building Engineering and Architecture, Universita Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy;

    Department of Civil and Building Engineering and Architecture, Universita Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Polymer modified bitumen; Viscosity; Rheological properties; Cox-Merz relationship;

    机译：聚合物改性沥青;粘度;流变性能;考克斯-默兹关系;

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