The Effect of Asphalt and Aggregate Gradation on the Low-Temperature Performance of Asphalt Mixtures for Intermediate and Underlying Course

Abstract:

Aiming at the asphalt mixture type used in intermediate and underlying course of high-grade highways in Northeast region of China, the research of effect of asphalt and gradation on the low-temperature performance of asphalt mixture was carried out to recommend asphalt grade and grading type which is suitable for intermediate and underlying course of high-grade highway in Northeast region of China. The results show that the asphalt and gradation of aggregate has important impact on the low-temperature performance of asphalt mixture. The low-temperature bending creep rate of Grade A No.90 asphalt mixture specimen prepared is faster than that of Grade A No.70 asphalt mixture. To further illustrate the low-temperature deformation resistance performance of Grade A No.90 asphalt is better than that of Grade A No.70.asphalt.The low-temperature bending creep rate of modified asphalt mixture of gradation GLAC-20 is greatly improved. Grade A No.90 asphalt modified is suggested to use in intermediate course, and the gradation type which is suitable for intermediate and underlying course is recommended for reference.

• Periodical: Applied Mechanics and Materials (Volumes 505-506)
• Pages: 251-254
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.505-506.251
• Online since: January 2014
• Authors: Zhao Hui Sun, Qing Bin Yu, Tie Bin Wang, Bao Yang Yu, Guang Qiang Zhu, Jing Ma
• Keywords: Asphalt Mixture (AC), Bending Creep Rate Intermediate Course, Low-Temperature Deformation Performance, Underlying Course

References

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