Wu Xing, Kang Aihong, Wu Bangwei, Lou Keke, Fan Zhao
College of Civil Science and Engineering, Yangzhou University, Yangzhou 225100, China.
Research Center for Basalt Fiber Composite Construction Materials, Yangzhou 225127, China.
Materials (Basel). 2021 Jun 10;14(12):3209. doi: 10.3390/ma14123209.
This paper aims to better analyze the crack resistance of lignin fiber reinforced SMA-13 (LFSMA-13) asphalt mixtures, with and without polymer anti-rut agent (ARA), under different aging degrees. IDEAL-CT test and Fourier transform infrared (FTIR) spectroscopy were utilized to analyze the relationships between the crack resistance of LFSMA-13, with and without ARA, and the parameters of the FTIR spectrum of the asphalt extracted from the test samples. A convenient testing method to predict the anti-crack ability of the mixtures in a road was also derived in this study. The test samples were prepared using the specifications listed by AASHTO. The fracture formation work (W) and cracking index (CT) in the IDEAL-CT test were adopted to reflect the cracking ability of the asphalt mixtures in both the crack formation stage and the crack propagation stage. The peak areas of the FTIR spectrum were utilized to reveal the chemical properties of the asphalt material inside the SMA-13 asphalt mixtures, with and without ARA under different aging degrees. Grey correlation analysis was adopted to choose the most suitable FTIR spectrum parameters to derive the prediction models of W and CT under different aging degrees. After conducting a series of tests, the results showed that the aging process could well affect the crack resistance of the test samples and the peak areas of the asphalt extracted from the mixtures. The FTIR parameters selected from the grey correlation analysis could be used to well predict the anti-crack ability of the asphalt mixtures.
本文旨在更好地分析木质素纤维增强SMA-13（LFSMA-13）沥青混合料在不同老化程度下，添加和不添加聚合物抗车辙剂（ARA）时的抗裂性能。利用IDEAL-CT试验和傅里叶变换红外（FTIR）光谱分析了添加和不添加ARA的LFSMA-13的抗裂性能与从试验样品中提取的沥青的FTIR光谱参数之间的关系。本研究还推导了一种预测道路中混合料抗裂能力的简便测试方法。试验样品按照美国州公路和运输官员协会（AASHTO）列出的规范制备。采用IDEAL-CT试验中的断裂形成功（W）和开裂指数（CT）来反映沥青混合料在裂缝形成阶段和裂缝扩展阶段的开裂能力。利用FTIR光谱的峰面积来揭示不同老化程度下添加和不添加ARA的SMA-13沥青混合料内部沥青材料的化学性质。采用灰色关联分析选择最合适的FTIR光谱参数，推导不同老化程度下W和CT的预测模型。经过一系列试验，结果表明老化过程会显著影响试验样品的抗裂性能以及从混合料中提取的沥青的峰面积。从灰色关联分析中选择的FTIR参数可用于很好地预测沥青混合料的抗裂能力。
