Asphalt is a vital construction material for roads, and its properties can be enhanced by modification. In this study, a composite modified asphalt was developed using pyrolytic carbon black (PCB) and chicken feather fiber (CFF). Box–Behnken design of response surface methodology was employed to optimize the preparation parameters, and the optimal parameters were determined to be a PCB dosage of 15% (weight ratio), a CFF dosage of 0.3% (weight ratio), and a chicken feather (CF) shear time of 8.2 min. A Dynamic Shear Rheometer (MCR302) was used to analyze the high-temperature rheological properties of the modified asphalt samples, and the results showed that the addition of PCB and CFF enhanced the high temperature performance and anti-aging performance of the asphalt. The rheological properties at high temperature increased progressively with the increase in CFF dosage. The Bending Beam Rheometer (BBR) test was conducted to evaluate the low-temperature rheological property of PCB/CFF composite modified asphalt, which was observed to decrease with the increase in CFF dosage. The microscopic properties and the chemical group of 15% PCB + 0.3% CFF with 8.2 min CF shear time composite modified asphalt (0.3%PC-MA) were analyzed using Fourier Transform Infrared spectrometer and Fluorescence Microscopy, and the results indicated that PCB and CFF were physically blended with asphalt without undergoing a chemical reaction, and they were well compatible with and evenly distributed in asphalt. Finally, the high- and low-temperature performances, as well as water stability, of the base asphalt (BA), 15% PCB dosage modified asphalt (P-MA), and 15% PCB dosage modified asphalt with x% CFF dosage with a shear time of 8.2 min (PC-MA) were compared. The addition of CFF significantly enhanced the high-temperature and low-temperature performances, as well as water stability of P-MA mixtures. The aim of this study is to provide a laboratory test basis for the application of PCB/CFF composite modified asphalt.

中文翻译：

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热解炭黑与鸡毛纤维复合改性沥青的优化与表征

沥青是道路的重要建筑材料，其性能可以通过改性来增强。在这项研究中，使用热解炭黑（PCB）和鸡毛纤维（CFF）开发了一种复合改性沥青。采用响应面法Box-Behnken设计对制备参数进行优化，确定最佳参数为PCB用量15%（重量比）、CFF用量0.3%（重量比）、鸡毛(CF) 剪切时间为 8.2 分钟。采用动态剪切流变仪（MCR302）对改性沥青样品的高温流变性能进行了分析，结果表明，PCB和CFF的添加增强了沥青的高温性能和抗老化性能。随着CFF用量的增加，高温流变性能逐渐提高。采用弯曲梁流变仪（BBR）测试评估PCB/CFF复合改性沥青的低温流变性能，发现随着CFF掺量的增加，低温流变性能降低。利用傅里叶变换红外光谱仪和荧光显微镜对15% PCB + 0.3% CFF 8.2 min CF 剪切时间复合改性沥青（0.3%PC-MA）的微观性能和化学组分进行了分析，结果表明 PCB 和 CFF与沥青物理混合，不发生化学反应，与沥青相容性好，分布均匀。最后比较了基础沥青(BA)、15%PCB掺量改性沥青(P-MA)和15%PCB掺量改性沥青的高低温性能以及水稳定性。X比较了剪切时间为 8.2 分钟的 CFF 剂量百分比 (PC-MA)。CFF的添加显着增强了P-MA混合物的高温和低温性能以及水稳定性。本研究旨在为PCB/CFF复合改性沥青的应用提供实验室试验依据。