To clarify the effect and mechanism of straw waste on the properties of asphalt materials, two types of modified asphalt were prepared by using straw powder (SP) and incineration ash (IA). The impact of SP and IA on the physical properties of asphalt was studied. The microscopic morphology characteristics and chemical composition of modified asphalt were analysed and investigated using a focused ion beam scanning electron microscope and an energy-dispersive X-ray spectrometer. Finally, the thermal properties and molecular structure variation of modified asphalt were characterised by a thermogravimetric analyser coupled with a Fourier transform infrared spectrometer. The results indicate that IA has a greater potential in enhancing and improving the physical and thermal properties of asphalt than SP. The incinerating process could promote the fusion between SP and asphalt, which mitigates the negative effect on low-temperature deformation of asphalt. IA could reduce the weight loss of asphalt, obviously preventing its combustion process. The addition of IA leads to the variation of absorbance intensity of asphalt, which suggests the potential of IA on improving the thermal stability of asphalt materials.

中文翻译：

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基于TG-FTIR的秸秆转化沥青材料决策支持

为阐明秸秆废料对沥青材料性能的影响及其机理，利用秸秆粉（SP）和焚烧灰（IA）制备了两种改性沥青。研究了SP和IA对沥青物理性质的影响。采用聚焦离子束扫描电子显微镜和能量色散X射线光谱仪对改性沥青的微观形貌特征和化学成分进行了分析研究。最后，利用热重分析仪和傅里叶变换红外光谱仪对改性沥青的热性能和分子结构变化进行了表征。结果表明，IA 在增强和改善沥青的物理和热性能方面比 SP 具有更大的潜力。焚烧过程可以促进SP与沥青的融合，减轻对沥青低温变形的负面影响。IA可以减少沥青的失重，明显阻止其燃烧过程。IA的加入导致沥青吸收强度的变化，这表明IA在改善沥青材料热稳定性方面的潜力。