基于组分调和理论的沥青再生剂材料设计与性能研究

Research on Design and Performance of Asphalt Rejuvenator Material Based on Compositional Fusion Theory

摘要: 本文研究一种再生及抗老化能力优良的废旧沥青再生剂RA，并选取RB、RC两种市售再生剂进行对比。再生剂RA以芳烃油为基础油分，经试验设计分析确定了抗老化剂与增塑剂掺量。依据再生沥青三大指标及粘度试验，确定了再生剂最佳掺量为6%。通过动态剪切流变试验分析，结果显示三种不同种类再生剂均能恢复老化沥青的流变性能，再生沥青A1的复数模量G*与相位角θ可以接近70#基质沥青的水平；通过多级应力重复蠕变试验分析发现再生沥青A1可以获得更高的蠕变恢复率。低温弯曲蠕变试验结果发现自主研发的再生剂RA可以较好的恢复老化沥青的低温抗裂性能。经过对再生沥青质量损失、残留针入度比以及软化点增值的分析，再生沥青A1具有更好的抗老化性能。

Abstract: In this paper, a kind of asphalt rejuvenator RA with good regeneration and aging resistance was studied, and RB and RC were selected for comparison. The amount of antiaging agent and plasticizer was determined by experimental design and analysis. According to the three indexes of recycled asphalt and viscosity test, the optimum content of recycled asphalt is 6%. Through dynamic shear rheological test analysis, the results show that three different kinds of regeneration agents can restore the rheological property of aging asphalt, the complex modulus G* of recycled asphalt A1 and phase Angle θ can be close to the level of 70# virgin asphalt. It is found that regenerated asphalt A1 can obtain higher creep recovery rate through repeated creep test analysis of multi-stage stress. The results of low temperature bending creep test show that the self-developed rejuvenator RA can restore the low temperature cracking resistance of aged asphalt. Through the analysis of quality loss, residual penetration ratio and softening point increment of regenerated asphalt, regenerated asphalt A1 has better aging resistance.