Modulus Back-Calculation Based on FWD Dynamic Deflection Basin for Semi-Rigid Base Asphalt Pavement

Abstract:

To study semi-rigid base asphalt pavement response characteristics, two structural APT test roads of cement stabilized aggregate and lime fly-ash stabilized aggregate were constructed, and accelerated loading test was developed. After certain number of wheel loads (70,000 times) pavement deflection basin parameters were detected by using the falling weight deflectometer, then modulus of each pavement layer was back-calculated, dynamic response was analyzed. Studies have shown that the modulus of semi-rigid base decay faster, and with decreasing thickness of the semi-rigid base, the greater the rate of decay of modulus; cement stabilized aggregate decay rate is greater than that of lime fly-ash stabilized aggregate.

• Periodical: Applied Mechanics and Materials (Volumes 587-589)
• Pages: 1062-1066
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.587-589.1062
• Online since: July 2014
• Authors: Chuan Yi Zhuang, Ya Li Ye*
• Keywords: Asphalt Pavement, Back-Calculated Modulus, Falling Weight Deflectometer, Semi-Rigid Base

References

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DOI: 10.17226/23380

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