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采用重复蠕变试验对基质沥青和SBS改性沥青的高温性能随老化程度的变化规律展开研究。结果表明,SBS改性沥青和基质沥青的累积应变随老化程度的增加而减小,Gv值随老化程度的增加而增大,两种沥青的高温性能都随老化程度的增加而增强;SBS改性沥青表现出更好的高温抗变形性能和弹性恢复能力;SBS改性沥青的累积应变和Gv值随老化程度的变化幅度小于基质沥青,表明SBS改性沥青具有更好的抗老化性能。
The repeated creep test was used to study the variation of high temperature properties of matrix asphalt and SBS modified asphalt with the aging degree. The results show that the cumulative strain of SBS modified asphalt and matrix asphalt decreases with the increase of aging degree, and the Gv value increases with the increase of aging degree. The high temperature performance of both asphalt increases with the increase of aging degree. Asphalt showed better high temperature deformation resistance and elastic recovery ability. The cumulative strain and Gv value of SBS modified asphalt were less than that of matrix asphalt, indicating that SBS modified asphalt had better anti-aging properties.