Enhancing fatigue resistance and low-temperature performance of asphalt pavements using antioxidant additives

IF 3.4 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Materials and Structures Pub Date : 2025-01-21 DOI:10.1617/s11527-025-02574-4

Yongping Hu, Xu Cheng, Anand Sreeram, Wei Si, Bo Li, Georgios Pipintakos, Gordon D. Airey

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引用次数: 0

Abstract

Ageing results in significant performance deterioration of asphalt, especially in relation to its fatigue and low-temperature performance. This performance deterioration can theoretically be lowered by incorporating antioxidants in asphalt mixtures. Although there are several promising studies that have shown the potential efficacy of antioxidants such as zinc diethyldithiocarbamate (ZDC), no work has comprehensively evaluated its performance. In this regard, ZDC was employed to evaluate its effect as an antioxidant to slow down the ageing related performance deterioration of bitumen and asphalt mixtures. Both ZDC-modified (3% and 5%) and unmodified bitumen and asphalt mixtures were subjected to short-term and long-term ageing. Afterwards, linear amplitude sweep (LAS) tests and low-temperature frequency sweep tests were carried out on the bitumen samples using a dynamic shear rheometer (DSR). Four-point bending (4PB) fatigue tests were carried out at 25 °C, and indirect tensile asphalt cracking tests (IDEAL-CT) were carried out at 25 °C and −10 °C on the various asphalt mixtures. It was seen that properties of long-term aged bitumen and asphalt mixtures measured at low temperature and intermediate temperature could be improved by 13–69% for mixtures and 1–44% for bitumen with the addition of ZDC, compared to the unmodified samples. The ageing-mitigation efficiency of ZDC was more pronounced for the low-temperature performance-based metrics since its performance deterioration rate was significantly reduced. Overall, a comprehensive performance evaluation of the effectiveness of antioxidants at different scales provided robust evidence for the potential extension of this technology to field trials and application.

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使用抗氧化添加剂提高沥青路面的抗疲劳性能和低温性能

老化导致沥青的性能显著下降，特别是在其疲劳和低温性能方面。理论上，在沥青混合料中加入抗氧化剂可以降低这种性能恶化。虽然有一些很有前景的研究显示了抗氧化剂的潜在功效，如二乙基二硫代氨基甲酸锌（ZDC），但还没有研究对其性能进行全面评估。在这方面，ZDC被用来评估其作为抗氧化剂的效果，以减缓与老化有关的沥青和沥青混合料的性能下降。zdc改性（3%和5%）和未改性的沥青和沥青混合料都经历了短期和长期的老化。随后，利用动态剪切流变仪（DSR）对沥青试样进行了线性振幅扫描（LAS）试验和低温频率扫描试验。在25℃条件下进行了四点弯曲（4PB）疲劳试验，在25℃和- 10℃条件下对各种沥青混合料进行了间接拉伸沥青开裂试验（IDEAL-CT）。结果表明，在低温和中温条件下，掺加ZDC的长期老化沥青和沥青混合料的性能比未掺加ZDC的沥青和混合料的性能分别提高了13-69%和1-44%。在低温性能指标下，ZDC的老化减缓效率更为显著，其性能劣化率显著降低。总体而言，对不同规模抗氧化剂有效性的综合性能评估为该技术在田间试验和应用中的潜在推广提供了有力的证据。

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

Materials and Structures 工程技术-材料科学：综合

CiteScore

6.40

自引率

7.90%

发文量

222

审稿时长

5.9 months

期刊介绍： Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.