基于红外光谱法的沥青老化性能研究

Study on Asphalt Aging Properties by Infrared Spectroscopy

采用红外光谱法研究两种沥青不同老化时间前后羰基吸收峰面积,并对校正后的峰面积值进行定量分析,考察沥青在老化与抗老化过程中结构变化规律。试验结果表明:羰基官能团可作为沥青老化的特征峰;羰基峰面积增加幅度越大,沥青越易老化,且与针入度比的结果一致;羰基峰面积与沥青老化时间呈现线性关系,且相关系数大于0.9。

The carbonyl absorption peak areas of asphalt,before and after aging,aging different time,are measured by infrared spectroscopy.The peak area value is corrected for quantitative analysis,and the structural change rule of asphalt in aging and anti-aging process is investigated.The results show that the carbonyl functional group can be used as the characteristic peak of asphalt aging;the greater the increase of carbonyl peak area,the easier the asphalt aging,and in line with the penetration ratio;the carbonyl peak area has a linear relationship with asphalt aging time,and the correlation coefficient is greater than 0.9.