Chemical and Rheological Evaluation of the Ageing Behaviour of High-Content Crumb Rubber Asphalt Binder.

IF 4.7 3区工程技术 Q1 POLYMER SCIENCE Polymers Pub Date : 2024-10-31 DOI:10.3390/polym16213088

Zhilian Ji, Zhibin Wang, Lei Feng, Peikai He, Song Li

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Abstract

High-Content Crumb Rubber Asphalt (HCRA) binder improves road performance and address waste tyre pollution, yet its ageing behaviour is not fully understood. In this study, 70# neat asphalt binder and HCRA with rubber contents of 35% and 50% were selected and aged through the Thin Film Oven Test (TFOT) and Pressure Ageing Vessel (PAV) tests. FTIR (Fourier Transform Infrared Spectroscopy) and DSR (Dynamic Shear Rheometer) were employed to investigate their chemical composition and rheological properties. The FTIR results show that HCRA's chemical test results are similar to those of 70#, but HCRA is more susceptible to ageing. I(C=C) strength decreases with age. The DSR results show that HCRA outperforms 70# neat asphalt binder in terms of viscoelasticity, high temperature performance and fatigue resistance, and exhibits greater resistance to ageing. The ageing index (AI) was obtained through a calculation using the formula, and overall, 70# neat asphalt binder is more sensitive to ageing behaviour and less resistant to ageing, and HCRA is particularly outstanding for fatigue resistance. A strong correlation is observed between chemical composition and some rheological property indicators. Therefore, we are able to predict the rheological properties using chemical composition indicators. This study provides insight into the ageing behaviour of a neat asphalt binder and an HCRA binder and demonstrates that the HCRA binder outperforms conventional asphalt in several performance areas. It also provides theoretical support for the consumption of waste tyres to prepare high content crumb rubber asphalt.

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高含量碎屑橡胶沥青粘结剂老化行为的化学和流变学评估

高含量碎屑橡胶沥青（HCRA）粘结剂可改善道路性能并解决废轮胎污染问题，但人们对其老化行为尚未完全了解。本研究选择了 70# 纯沥青粘结剂和橡胶含量分别为 35% 和 50% 的 HCRA，并通过薄膜烘箱试验（TFOT）和压力老化试验（PAV）对其进行老化。傅立叶变换红外光谱仪（FTIR）和动态剪切流变仪（DSR）被用来研究它们的化学成分和流变特性。傅立叶变换红外光谱结果表明，HCRA 的化学测试结果与 70# 相似，但 HCRA 更容易老化。I(C=C) 强度随老化而降低。DSR 结果表明，HCRA 在粘弹性、高温性能和抗疲劳性方面均优于 70# 纯沥青胶结料，并表现出更强的抗老化性。通过公式计算得出了老化指数（AI），总体而言，70# 纯沥青胶结料对老化行为更敏感，抗老化性更差，而 HCRA 的抗疲劳性尤为突出。化学成分与某些流变特性指标之间存在很强的相关性。因此，我们可以利用化学成分指标来预测流变特性。这项研究深入探讨了纯沥青粘结剂和 HCRA 粘结剂的老化行为，并证明 HCRA 粘结剂在多个性能领域优于传统沥青。该研究还为利用废轮胎制备高含量橡胶沥青提供了理论支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Polymers POLYMER SCIENCE-

CiteScore

8.00

自引率

16.00%

发文量

4697

审稿时长

1.3 months

期刊介绍： Polymers (ISSN 2073-4360) is an international, open access journal of polymer science. It publishes research papers, short communications and review papers. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Polymers provides an interdisciplinary forum for publishing papers which advance the fields of (i) polymerization methods, (ii) theory, simulation, and modeling, (iii) understanding of new physical phenomena, (iv) advances in characterization techniques, and (v) harnessing of self-assembly and biological strategies for producing complex multifunctional structures.