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从二次老化角度对沥青玛蹄脂自愈性能的研究

Investigation of Self-Healing Performance of Asphalt Mastic-From the Perspective of Secondary Aging.

作者信息

Li Bo, Wang Yu, Xiao Peng, Kang Aihong, Zhang Yao, Wu Zhengguang

机构信息

College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China.

Research Center for Basalt Fiber Composite Construction Materials, Yangzhou 225127, China.

出版信息

Materials (Basel). 2023 Dec 8;16(24):7567. doi: 10.3390/ma16247567.

DOI:10.3390/ma16247567
PMID:38138709
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10744819/
Abstract

Reclaimed asphalt pavement (RAP) has been widely utilized because it is an environmentally friendly and economical material. The performance of recycled asphalt mixtures will deteriorate gradually with the secondary aging process of asphalt, including the self-healing property. To further understand the self-healing characteristics of asphalt after secondary aging, taking 70# petroleum asphalt, SBS-modified asphalt, and extracted old asphalt mastics as objects, the fatigue self-healing test and fracture self-healing test were conducted to simulate the intermediate-and low-temperature healing behaviors of different asphalt mastics. The impact of healing time, healing temperature, and aging degree of mastics on the healing performance was systematically investigated. The results show that the original unaged asphalt mastics present excellent fatigue healing properties with an index of 0.796 and 0.888 for 70# petroleum and SBS-modified asphalt mastics, respectively. The secondary aging process causes significant impact on the healing properties, leading to a great drop in the corresponding index, which decreased to 47.5% and 72.5% of that of the unaged ones. The fracture healing ability of all mastics was much inferior to the fatigue healing. After secondary aging, the fracture healing index values of 70# petroleum asphalt, SBS-modified asphalt, and extracted old asphalt mastics were all as low as around 0.3, indicating similar performance can be found in the secondary aged SBS-modified asphalt mastics and 70# asphalt mastics. Overall, after secondary aging, the fatigue damage of SBS-modified asphalt mastics can be cured effectively by self-healing, but the fatigue and fracture self-healing properties of 70# asphalt mastics are difficult to recover. These results could provide an innovative view to understand the fatigue and fracture healing characteristics of recycled asphalt pavement after secondary aging.

摘要

再生沥青路面（RAP）因其是一种环保且经济的材料而被广泛应用。随着沥青的二次老化过程，再生沥青混合料的性能会逐渐恶化，包括自愈性能。为了进一步了解二次老化后沥青的自愈特性，以70#石油沥青、SBS改性沥青和提取的旧沥青胶浆为对象，进行了疲劳自愈试验和断裂自愈试验，以模拟不同沥青胶浆的中低温愈合行为。系统研究了愈合时间、愈合温度和胶浆老化程度对愈合性能的影响。结果表明，原始未老化的沥青胶浆具有优异的疲劳愈合性能，70#石油沥青和SBS改性沥青胶浆的指标分别为0.796和0.888。二次老化过程对愈合性能产生了显著影响，导致相应指标大幅下降，降至未老化时的47.5%和72.5%。所有胶浆的断裂愈合能力远低于疲劳愈合能力。二次老化后，70#石油沥青、SBS改性沥青和提取的旧沥青胶浆的断裂愈合指数值均低至0.3左右，表明二次老化后的SBS改性沥青胶浆和70#沥青胶浆具有相似的性能。总体而言，二次老化后，SBS改性沥青胶浆的疲劳损伤可通过自愈有效治愈，但70#沥青胶浆的疲劳和断裂自愈性能难以恢复。这些结果可为理解二次老化后再生沥青路面的疲劳和断裂愈合特性提供新的视角。

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Study on Adhesion Performance and Aging Strength Degradation Mechanism of SBS Modified Asphalt with Different Anti-Aging Additive.不同抗老化添加剂的SBS改性沥青粘附性能及老化强度降解机理研究
Materials (Basel). 2023 Jul 7;16(13):4881. doi: 10.3390/ma16134881.
3
Investigation of Asphalt Self-Healing Capability Using Microvasculars Containing Rejuvenator: Effects of Microvascular Content, Self-Healing Time and Temperature.
使用含再生剂的微血管研究沥青自愈能力：微血管含量、自愈时间和温度的影响
Materials (Basel). 2023 Jun 30;16(13):4746. doi: 10.3390/ma16134746.