Correction Factor of Surface Deflection for Inverted Asphalt Pavement Based on Linear-Anisotropy

Abstract:

Inverted asphalt pavement has been widely used in practical application. Anisotropy of granular material has been proved by experiment, but the current design specifications are also based on isotropic theory. Based on linear-anisotropic model, on the condition of the high, medium and low strength of soil subgrade, 4 different thickness of asphalt layer and 3 different thickness of granular sandwich are been systematically studied, the results show that, the strength of the soil subgrade has bigger effect on the pavement deflection, the deflection difference of the low to the high subgrade is about 14~23%, with the increase of granular material anisotropy, the deflection correction factor is bigger, with the granular sandwich anisotropic rates from 0.1 to 0.5, the deflection correction factor is within 1.04, the thin asphalt layer and the thick granular sandwich have bigger effect on the deflection correction factor, for the common inverted asphalt pavement structure, the proposed deflection correction factor is 1.02~1.04, it can be used directly in asphalt pavement design.

• Periodical: Advanced Materials Research (Volumes 255-260)
• Pages: 3311-3315
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.255-260.3311
• Online since: May 2011
• Authors: Zhen Feng Li, Xiang Yun Guo, Ming Zhang
• Keywords: Anisotropy, Asphalt Pavement, Deflection, Granular Layer, Inverted

References

[1] Specifications for Design of Highway Asphalt Pavement (China Communications Press, P.R. China 2006).

[2] Application Handbook of Specifications for Design of Highway Asphalt Pavement (China Communications Press, P.R. China 2008).

[3] Tutumluer,E. and M.R. Thompson: Anisotropic Modeling of Granular Bases in Flexible Pavements. In Transportation Research Record 1577, TRB,National Research Council,Washington D.C.(1997):18-26.

DOI: 10.3141/1577-03

[4] Tutumluter,E.and M.R. Thompson: Granular Base Moduli for Mechanistic Pavement Design. Proceedings of the ASCE Airfield Pavement Conference, Seattle, Washington, August 17-20(1997):33-47.

[5] Tutumluter,E: Nonlinear Anisotropic Modeling of Dilative Granular Material Behavior. Proceedings of the Ninth International Conference of the Association for Computer Methods and Advances in Geomechanics, IACAMAG 97,Wuhan,China,November2-7(1997).

[6] FAA: Characterization of Anisotropic Granular Layer Behavior In Flexible Pavements. FAA COE ReportNo.18(2002).

[7] ICAR: Structural Characteristics of Unbound Aggregate Bases to Meet AASHTO 2002 Design Requirements. ICAR/502-1(2001).

[8] ICAR: Field Validation of the Cross-Anisotropic Behavior of Unbound Aggregate Bases. ICAR/502-2(2001).

[9] ICAR: Characterization of Unbound Granular Layers In Flexible Pavements. ICAR/502-3(2001).

[10] Zhenfeng Li, Zhongyin Guo: The Response Model of Pavement Based on Anisotropy. International Innovation Forum for Doctoral Students in Transportation Engineering, SHANGHAI(2005).

[11] Zhenfeng Li, Xiangyun Guo: Analysis of inverted asphalt pavement structure based on cross-anisotropy. Journal of Chongqing Jianzhu University, Vol.29（1）(2007):65-69.

[12] Zhenfeng Li, Bingang Wang, Xiangyun Guo: Analysis of surface deflection and structure of asphalt pavement for granular base based on cross-anisotropy. Journal of Jiangsu University(Natural Science Edition), Vol.28（6）(2007):540-543.

DOI: 10.1109/icetce.2011.5775325

[13] Zhenfeng Li, Erol Tutumluer: The Design Theory and Methodology of Asphalt Pavement Based on The Cross-anisotropy. (China Water Power Press, P.R. China 2007).

[14] Chen Jinan: Summary of Foreign Asphalt Pavement Design(China Communications Press, P.R. China 2004).