基于傅里叶红外光谱法的沥青抗老化能力分析

Analysis of Asphalt Aging Resistance Based on Fourier Transform Infrared Spectroscopy Method

为了快速评定沥青抗老化性能,通过傅里叶红外光谱(Fourier transform infrared spectroscopy,FTIR)测试,对抗老化改性沥青老化前后官能团变化进行定性与定量分析;通过不同评价标准,对比官能团指数变化率与残留针入度比之间的相关系数,分析官能团指数变化率与常规指标相关性;并利用FTIR法推定抗氧剂1010在抗老化改性沥青中的含量。结果表明:FTIR法可以准确地推定抗老化改性沥青中抗氧剂1010的含量;官能团指数变化率与残留针入度比有好的线性关系,因此利用FTIR可以快速评定沥青抗老化性能,避免了常规试验的缺点。

To quickly evaluate anti-aging performance of asphalt,qualitative and quantitative analysis on the changes of functional groups before and after aging of anti-aging modified asphalt was conducted by FTIR(Fourier transform infrared spectroscopy)testing.Using different evaluation standards,the correlation coefficients between the rate of change of functional group index and residual needle penetration ratio were compared and analyzed,and the correlation between FTIR and conventional test evaluation of anti-aging performance was scrutinized.The content of Irganox 1010 in anti-aging modified asphalt was determined using FTIR method.The results show that FTIR method could accurately determine the content ofIrganox 1010 in anti-aging modify asphalt.Meanwhile,there was a good linear relationship between the rate of change of functional group index and the ratio of residual penetration.Therefore,FTIR can be used to evaluate the anti-aging performance of asphalt quickly and avoid the disadvantages of conventional test.