【摘要】 目前中国处理老化的SBS改性沥青时，一般采用普通沥青再生剂，但它无法修复SBS交联网状结构，导致老化SBS改性沥青再生效果较差。因此，该研究采用一种含有结构修复剂、萃取油、增塑剂、增溶剂和少量SBS的新型反应型再生剂对老化SBS改性沥青进行再生。通过三大指标试验、布氏黏度试验、动态剪切流变试验和低温弯曲流变试验对再生SBS改性沥青的常规性能和流变性能进行研究。同时，借助荧光显微镜和红外光谱仪对再生SBS改性沥青的再生机理进行研究。结果表明：掺入反应型再生剂后，老化SBS改性沥青的各项常规性能都能得到恢复，使再生SBS改性沥青常规性能达到最佳的再生剂掺量为10%。在最佳再生剂掺量下，再生SBS改性沥青常规性能指标满足《公路沥青路面施工技术规范》（JTG F40—2004）中I-D级SBS改性沥青的技术要求。老化SBS改性沥青经再生后，SBS颗粒明显增多且分布较均匀，交联网状结构得到一定程度的恢复。再生剂中的环氧基团与老化SBS改性沥青的羰基发生聚合反应生成酯类化合物，将断裂的SBS分子链连接起来。更多还原

【Abstract】 At present, the common asphalt regenerant is used for treating the aged styrene-butadiene-styrene(SBS) modified asphalt in China, which fails to repair the SBS cross-networking structure, resulting in the poor regeneration effect of the aged SBS modified asphalt. In this study, a new reactive regenerator containing a structural repair agent, extractive oil, plasticizer, solubilizer, and a small amount of SBS was used to regenerate the aged SBS modified asphalt. The conventional properties and rheological properties of reclaimed SBS modified asphalt were studied by three index tests, Brookfield viscosity test, dynamic shear rheological test, and low temperature bending rheological test. Then, a fluorescence microscope and infrared spectrometer were used to study the regeneration mechanism of the reclaimed SBS modified asphalt. The results show that the conventional properties of the aged SBS modified asphalt can be restored after the addition of the reactive regenerant, and the regenerant content for achieving the optimal conventional properties of the reclaimed SBS modified asphalt is 10%. Under the optimal regenerant content, the conventional property indexes of the reclaimed SBS modified asphalt meet the technical requirements of Class I-D SBS modified asphalt in the Technical Specifications for Construction of Highway Asphalt Pavements(JTG F40—2004). After the aged SBS modified asphalt is regenerated, the SBS particles increase significantly and are distributed evenly, and the cross-networking structure is restored to a certain extent. The epoxy group in the regenerant polymerizes with the carboxyl group in the aged SBS modified asphalt to generate ester compounds and connect the broken SBS molecular chains.更多还原