ABSTRACT

This study aimed to establish the chemical-rheological property relationships of asphalt binders subjected to oxidative aging. Five asphalt binders were aged in the oven at several different temperatures for various durations. The chemical characteristic in terms of carbonyl index and rheological characteristic in terms of complex shear modulus and phase angle. The aged asphalt binders were measured using the Fourier Transform infrared spectroscopy (FTIR) and Dynamic Shear Rheometer (DSR) techniques, respectively. During oxidative aging process, the carbonyl index was predicted using the Glover’s aging kinetic model. Crossover frequency and rheological index generated from the aging mastercurves, correlates well with the carbonyl index of asphalt binders, and the correlations are independent of aging temperature and time. Christensen-Anderson model is used in combination with crossover frequency-carbonyl index and rheological index-carbonyl index relationships to predict complex shear modulus and phase angle master curves of the binder with respect to aging.

摘要

本研究旨在建立经过氧化老化的沥青结合料的化学流变特性关系。五种沥青粘合剂在烘箱中在几种不同的温度下老化不同的时间。羰基指数方面的化学特性和复剪切模量和相角方面的流变特性。分别使用傅里叶变换红外光谱 (FTIR) 和动态剪切流变仪 (DSR) 技术测量老化沥青结合料。在氧化老化过程中，羰基指数采用格洛弗老化动力学模型进行预测。老化主曲线产生的交叉频率和流变指数与沥青结合料的羰基指数有很好的相关性，并且相关性与老化温度和时间无关。