Design and Road Performance of High Modulus Natural Asphalt Mixture

Abstract

Abstract: To explore the design method and road performance of high modulus natural asphalt mixture, the following works were done: high modulus natural asphalt HMB was selected, and high modulus natural asphalt mixture BBME-13 (béton bitumineux à module elevé-13) was prepared by modified Marshall design method. The Marshall volume index and internal structure of the asphalt mixture were analyzed, and the road performance differences of the asphalt mixture with SBS modified asphalt mixture SBSAC-13 and base asphalt mixture SKAC-13 were compared. The applicability of BBME-13 was verified by the construction of test section. The results show that the asphalt aggregate ratio, stability, and dynamic modulus of BBME-13 are significantly higher than those of SBSAC-13 and SKAC-13. The representative values of dynamic stability, residual stability and freezing breaking strength of BBME-13 are 32.2%, 9.0% and 45.5% higher than SBSAC-13, 148.3%, 19.6% and 93.2% higher than SKAC-13, respectively.The maximum flexural strain of BBME-13 is 3.3% less than that of SBSAC-13, and 34.4% more than that of SKAC-13. The pavement of BBME-13 test section has excellent impermeability, and its skid resistance and compactness can also meet the requirements of the specification.

Key words: road engineering, high modulus natural asphalt mixture, modified Marshall design method, road performance, SBS modified asphalt mixture

CLC Number:

U414

GUO Yinchuan, ZHANG Zhengming, SHAO Dongye, SHI Xiaopeng, WANG Lusheng, WANG Junmao. Design and Road Performance of High Modulus Natural Asphalt Mixture[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(8): 2811-2821.

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