Road Performance of High-modulus Natural Asphalt Mixtures in Ningxia Region
To solve the severe pavement rutting diseases in heavy transportation road sections,this paper studied the road performance of the high-modulus natural asphalt mixtures based on the durable asphalt pavement experimental section in Ningxia Haiping Expressway.Selecting the HMB-W high-modulus natural asphalt as the study objective,the mix proportion of EME-20 was designed with the Marshall method to analyze the physical properties.The differences in the road performance between EME-20,SBS-AC-20,and the Shell matrix asphalt AC-20 were compared using indoor tests of high temperature,low temperature,water stability,and fatigue behavior.Finally,the applicability of EME-20 was verified by paving the experimental section.The results showed that the asphalt-aggregate ratio and stability of EME-20 were significantly higher than those of SBS-AC-20 and Shell AC-20.The dynamic stability,residual stability,freeze-thaw splitting strength,and fatigue life of EME-20 were higher than those of SBS-AC-20 by 27.5％,6.47％,2.82％,and 27.3％,and higher than those of Shell AC-20 by 122.3％,35.4％,7.63％,and 40.3％,respectively.However,the maximum bending strain of EME-20 was lower than that of SBS-AC-20 by 10％and higher than that of Shell AC-20 by 11.04％.Besides,the EME-20 experimental road section's compaction and impermeability met the specification requirements.
万方数据
维普
