Study on Pavement Structure Design and Performance Based on SBS Modified Asphalt Mixture
Taking an expressway reconstruction and expansion project in Guiyang area of Guizhou province as an example,the pavement struc-ture design of SBS modified asphalt mixture was analyzed,and the performance of SBS modified asphalt after construction was tested.The re-sults showed that the average rut depth of SBS modified asphalt mixture was 2.12 mm,the fracture elongation was 14.96%,the aging index was 1.22,the international roughness index(IRI)was 1.58m/km,the immersion residual strength(TSR)was 89.4%,and the dynamic stability was 5 860 times per-mm.The above indexes are higher than the performance level of ordinary asphalt.The results show that SBS modified asphalt can significantly improve the durability and stability of pavement,and it is suitable for use in complex climatic conditions in Guiyang,Guizhou province.
SBS modificationAsphalt mixturePavement structure designPerformance study
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