沥青组分对沥青抗老化性能影响研究

Influence of Asphalt Components on Anti-aging Performance of Asphalt

为掌握沥青组分对沥青抗老化性能的影响,选取5种沥青对其组分进行分析,并通过针入度、软化点及DSR等试验研究沥青老化前后性能变化规律,进而采用灰色关联分析法研究沥青组分对其抗老化性能影响主次,确定主要影响因素后以回归分析方法研究各因素对沥青抗老化性能影响趋势。结果表明:建议采用老化沥青残留物软化点增值、相位角比和复数模量比从不同角度反映沥青抗老化性能;饱和分+芳香分、芳香分和饱和分含量是影响老化沥青残留物软化点增值及复数模量比的主要因素,且三者影响程度依次降低,而沥青质是影响老化沥青残留物相位角比的主要因素;可按饱和分+芳香分、芳香分和饱和分顺序依次选择三者含量低或选择沥青质含量高的沥青提高其抗老化性能。

In order to master the influence of asphalt components on the anti-aging performance of asphalt,five kinds of asphalts were selected to analyze their components,and the penetration,softening point,and DSR tests were used to study the performance change rule of asphalt before and after aging.Then the gray correlation analysis method was used to study the influence degree of asphalt components on the anti-aging temperature performance.After determining the main influencing factors,the regression analysis method was used to study the influence trend of various factors on the anti-aging performance of asphalt.The results show that it is recommended to use aged asphalt residue softening point increment,phase angle ratio and complex modulus ratio to reflect the anti-aging performance of asphalt from different aspects.The“saturation+aromatic”,aromatic and saturation components are the main factors affecting the softening point increment and complex modulus ratio of the aged asphalt residue,and the influence degree of these three components is reduced in turn.Asphaltene is the main factor affecting the phase angle ratio of the aged asphalt residue.According to the order of“saturation+aromatic”,aromatic and saturation components,the asphalt with low content of three or high asphaltene content can be selected to improve its anti-aging performance.