Improving anti-aging performance of terminal blend rubberized bitumen by using graft activated crumb rubber

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

Journal of Polymer Engineering Pub Date : 2023-10-26 DOI:10.1515/polyeng-2023-0073

Juan Xie, Xucheng Zhao, Wen He, Yongning Zhang, Yabing Xin

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引用次数: 0

Abstract

Abstract The appearance of terminal blend rubberized bitumen (TB) has improved a series of defects of traditional rubber bitumen, such as high viscosity, poor storage stability. Therefore, its wide application prospect is self-evident. However, different degrees of thermal-oxidative aging problem still exist in the process from production to use of TB, which seriously affects the service life of pavement. To improve the anti-aging performance of TB, grafting activated crumb rubber (GACR) was obtained by using acrylamide, and then compounded with TB. Firstly, TB was prepared in the self-developed nitrogen protection device. Secondly, GACR modified bitumen (GACR-MB), TB/CR composite modified bitumen (TB/CR) and TB/GACR composite modified bitumen (TB/GACR) were developed in the atmospheric environment. Finally, the performance of four kinds of crumb rubber modified bitumens before and after aging was compared and analyzed by testing high and low temperature rheological properties. The results show that GACR slowed down the formation rate and aggregation degree of asphaltenes and other macromolecular substances, and TB/GACR showed excellent aging resistance.

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用接枝活化胶粒提高终端共混橡胶沥青的抗老化性能

终端共混橡胶沥青(TB)的出现，改善了传统橡胶沥青粘度高、贮存稳定性差等一系列缺陷。因此，其广阔的应用前景不言而喻。但TB从生产到使用过程中仍然存在不同程度的热氧化老化问题，严重影响了路面的使用寿命。为提高TB的抗老化性能，以丙烯酰胺为原料制备了接枝活性颗粒橡胶(GACR)，并与TB进行了复配。首先，在自行研制的氮气保护装置中制备TB。其次，在大气环境下研制了GACR改性沥青(GACR- mb)、TB/CR复合改性沥青(TB/CR)和TB/GACR复合改性沥青(TB/GACR)。最后，通过高低温流变性能测试，对四种颗粒橡胶改性沥青老化前后的性能进行了对比分析。结果表明，GACR减缓了沥青质等大分子物质的形成速度和聚集程度，TB/GACR表现出优异的耐老化性能。

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来源期刊

Journal of Polymer Engineering 工程技术-高分子科学

CiteScore

3.20

自引率

5.00%

发文量

审稿时长

2.5 months

期刊介绍： Journal of Polymer Engineering publishes reviews, original basic and applied research contributions as well as recent technological developments in polymer engineering. Polymer engineering is a strongly interdisciplinary field and papers published by the journal may span areas such as polymer physics, polymer processing and engineering of polymer-based materials and their applications. The editors and the publisher are committed to high quality standards and rapid handling of the peer review and publication processes.