Research on Shear Performance of Asphalt Mixture Based on RSCH

Abstract:

On the use of the Superpave Shear Test which was developed by Stratagem Highway Researching Plan in America (SHRP),this paper simulates the effect of two-way shear load in asphalt concrete (AC) overlay on the existing cement concrete pavement. According to the RSCH research on 7 kinds of asphalt mixtures,evaluating the shear performance of asphalt mixtures. The results showed that: 1. There was a significant correlation between the repeated shear times and shear strain using logarithmic curve; 2. void ratio had a greater influence on the shear performance of asphalt mixture.With greater void ratio, the shear strain is more sensitive to load. It takes more shear deformation to enter the stage on shear stability, and the stronger the ability to adapt for shear deformation; 3.with the same gradation and different asphalt variety, shear performance are different. When asphalt mixture is subjected the shear action, especially the instantaneous load, a high viscosity bitumen asphalt mixture can be given a large viscous resistance.

• Periodical: Applied Mechanics and Materials (Volumes 488-489)
• Pages: 462-465
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.488-489.462
• Online since: January 2014
• Authors: Fang Guo*, Wei Gu
• Keywords: AC, Asphalt Mixture (AC), Reflective Cracking, Repeated Shear Test at Constant Height (RSCH), Superpave Shear Tester (SST)

References

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DOI: 10.1520/d7312-10

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