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Fiber Dosage Effects in Asphalt Binders And Hot Mix Asphalt Mixtures.

机译：沥青粘合剂和热拌沥青混合料中的纤维剂量效应。

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摘要

The application of fibers and other materials in asphalt mixes has been studied and applied over the past five decades in order to improve pavement performance around the world. This thesis highlights the characteristics and performance properties of modified asphalt mixes using a blend of polypropylene and aramid fibers, The main objective of this study was to evaluate the effect of adding different fiber dosages on the laboratory performance of both asphalt binder and mixture. The laboratory study was conducted on sixteen different dosages and blends of the fibers, with various combinations of polypropylene and aramid, using binder tests as well as hot mix asphalt tests. The binder tests included: penetration, softing point, and Brookfield viscosity tests. The asphalt mixture tests included the dynamic modulus, and indirect tensile strength. The binder test results indicated that the best viscosity - temperature susceptibility performance would be from the blend of three dosages of polypropylene and one dosage of aramid, the dynamic modulus test results also confirmed this finding. Overall, in almost every case, the addition of fibers resulted in an increase in mixture stiffness regardless of fiber content. From the indirect tensile strength results, the polypropylene fibers had less of an effect on post peak failure than the aramid fibers. Overall, the aramid fibers yielded better results than the polypropylene fibers.;This study has important implications for the future of pavement design and the prospect of using optimal dosages of polypropylene and aramid fibers in further research to further determine their long-term performance and characteristics used in real world applications.
机译：在过去的五十年中，已经研究并应用了纤维和其他材料在沥青混合料中的应用，以改善世界各地的路面性能。本文着重介绍了使用聚丙烯和芳纶纤维共混物改性沥青混合料的特性和性能特性。本研究的主要目的是评估添加不同纤维用量对沥青粘合剂和混合料的实验室性能的影响。使用粘合剂测试以及热混合沥青测试对十六种不同剂量和不同纤维混合物以及聚丙烯和芳纶的各种组合进行了实验室研究。粘合剂测试包括：渗透率，软化点和布氏粘度测试。沥青混合料测试包括动态模量和间接拉伸强度。粘合剂测试结果表明，最佳粘度-温度敏感性性能应来自三剂聚丙烯和一剂芳族聚酰胺的混合物，动态模量测试结果也证实了这一发现。总体而言，几乎在每种情况下，无论纤维含量如何，纤维的添加都会导致混合物刚度的增加。根据间接拉伸强度结果，聚丙烯纤维对峰后破坏的影响小于芳族聚酰胺纤维。总体而言，芳纶纤维比聚丙烯纤维产生更好的结果。该研究对路面设计的未来以及使用最佳剂量的聚丙烯和芳纶纤维进一步研究进一步确定其长期性能和特性的前景具有重要意义。在实际应用中使用。

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  • 作者

    Alrajhi, Ashraf.;

  • 作者单位

    Arizona State University.;

  • 授予单位 Arizona State University.;
  • 学科 Engineering Civil.
  • 学位 M.S.
  • 年度 2012
  • 页码 205 p.
  • 总页数 205
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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