Design and Low-Temperature Performance Evaluation of High-Modulus Co-Modified Asphalt Mixes with Rock Asphalt/Rubber Powder

IF 2.5 4区综合性期刊 Q2 CHEMISTRY, MULTIDISCIPLINARY

Applied Sciences-Basel Pub Date : 2023-07-11 DOI:10.3390/app13148075

Lianfang Wang, Lijun Sun, Q. Lv

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引用次数: 0

Abstract

High-modulus asphalt mixes are effective means to solve rutting problems, but they perform poorly at low temperatures. This study aims to enhance the modulus and low-temperature properties of mixes. Firstly, composite-modified asphalts and mixes were prepared by incorporating rubber powder and rock asphalt. Secondly, their mechanical and viscoelastic properties were investigated to determine the appropriate mass ratios of rubber powder and rock asphalt in asphalt to be 20% and 6%, respectively. The results show that both rock asphalt and rubber powder can enhance the softening point and viscosity of basic asphalt while reducing penetration. Furthermore, their combination significantly improves the high-temperature performance of the material. It is noteworthy that the rubber powder also improves the weakening of rock asphalt for mixtures at low temperatures. Finally, this study employs dynamic and static modulus tests, rutting tests, and beam bending tests to clarify the road properties of composite-modified asphalt mixes. The results indicate that mixes have high-modulus and water damage resistance while considering acceptable low-temperature performance. This paper not only enhances the adaptability of high-modulus asphalt in different environments but also expands its application range.

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岩石沥青/胶粉高模量共改性沥青混合料的设计及低温性能评价

高模量沥青混合料是解决车辙问题的有效手段，但在低温下表现不佳。本研究旨在提高混合料的模量和低温性能。首先，将胶粉和岩石沥青混合制成复合改性沥青及其混合料。其次，研究了它们的力学性能和粘弹性，确定了橡胶粉和岩石沥青在沥青中的适当质量比分别为20%和6%。结果表明，岩石沥青和胶粉在降低渗透性的同时，都能提高基础沥青的软化点和粘度。此外，它们的结合显著提高了材料的高温性能。值得注意的是，橡胶粉末还改善了低温下混合料的岩石沥青的弱化。最后，本研究采用动静态模量试验、车辙试验和梁弯曲试验来阐明复合改性沥青混合料的道路性能。结果表明，在考虑可接受的低温性能的情况下，混合料具有高模量和耐水损性。本文不仅提高了高模量沥青在不同环境中的适应性，而且扩大了其应用范围。

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来源期刊

Applied Sciences-Basel CHEMISTRY, MULTIDISCIPLINARYMATERIALS SCIE-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.30

自引率

11.10%

发文量

10882

期刊介绍： Applied Sciences (ISSN 2076-3417) provides an advanced forum on all aspects of applied natural sciences. It publishes reviews, research papers and communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files and software regarding the full details of the calculation or experimental procedure, if unable to be published in a normal way, can be deposited as supplementary electronic material.