Volume List  / Volume 11 (4)

Article

A PROPOSED SAFETY COEFFICIENT FOR FLEXIBLE PAVEMENT DESIGN IN AFGHANISTAN

DOI: 10.7708/ijtte2021.11(4).05


11 / 4 / 554 - 564 Pages

Author(s)

Mohammad Razeq Shakhan - Department of Civil Engineering, Dokuz Eylul University, Cumhuriyet Bulvarı No: 144 35210 Alsancak/Izmir, Turkey -


Abstract

The conventional AASHTO pavement design methods were developed for specific climate conditions in the United States of America, which significantly limits its ability to consider the climate conditions in other parts of the world. As the environmental factors have a strong effect on pavement performance, therefore, the performance of pavements designed according to AASHTO 1993 and constructed in different zones would not be the same. In other words, the pavement structure would be over or under-designed, when AASHTO 1993 is used. In contrast, the climate effects are widely considered in the Mechanistic-Empirical (ME) pavement design method. Although Afghanistan consists of extremely different climatic zones, still flexible pavements are designed based on AASHTO 1993 method. Therefore, this study investigates the temperature effect on flexible pavement distresses in hot and cold regions in Afghanistan in order to optimize the AASHTO 1993 using the mechanistic-empirical approach. Thus, a typical flexible pavement was designed using AASHTO 1993 for three traffic levels [5, 20, and 50 Equivalent Single Axle Load (ESAL)] and then, the designed pavement structures were simulated by ME pavement design software to predict the rutting and cracking. Results revealed that AASHTO 1993 designs thinner pavement layers in the hot region which is reflected in the prevalent rutting problem in the hot region in Afghanistan. Furthermore, based on analysis results, a conservative design based on the ME pavement design analysis is recommended to be used to scale up the pavement thickness.


Download Article

Number of downloads: 451


References:

AASHTO. 1993. Guide for Design of Pavement Structures. American Association of State Highway and Transportation Officials, Washington, D.C. USA. 624 p.

 

AASHTO. 2008. Mechanistic Empirical Pavement Design Guide: A Manual of Practice. Interim Ed. USA: American Association of State Highway and Transportation Officials. 218 p.

 

AASHTO. 2020. Mechanistic-Empirical Pavement Design Guide: A Manual of Practice. 3rd ed. USA: American Association of State Highway and Transportation Officials. 264 p.

 

Amini, A.A.; Behbahani, H. 2011. Comparison of Pavement Design using AASHTO 1993 and NCHRP Mechanistic-Empirical Pavement Design Guides. In Proceedings of the 5th International Conference Bituminous Mixtures and Pavements, 1-10.

 

ARC. 2013. Pavement Response Model to Dynamic Loads 3D Move. Quarterly Technical Progress Report. Asphalt Research Consortium. USA.

 

Carvalho, R.L.; Schwartz, C.W. 2006. Comparisons of Flexible Pavement Designs: AASHTO Empirical Versus NCHRP project 1-37A Mechanistic-Empirical, Transportation Research Record 1947(1): 167-174.

 

El-Badawy, S.M.; Bayomy, F.M.; Santi, M.; Clawson, C.E. 2011. Comparison of Idaho Pavement Design Procedure with AASHTO 1993 and MEPDG Methods. In Proceedings of the Transportation and Development Institute Congress:Integrated Transportation and Development for a Better Tomorrow, 586-595.

 

El-Shaib, M.A.; El-Badawy, S.M.; Shawali, E.S.A. 2017. Comparison of AASHTO 1993 and MEPDG Considering the Egyptian Climatic Conditions, Innovative Infrastructure Solutions 2(18): 2-9.

 

Mulandi, J.; Khanum, T.; Hossain, M.; Schieber, G. 2006. Comparison of Pavement Design Using AASHTO 1993 and NCHRP Mechanistic-Empirical Pavement Design Guides. In Proceedings of the Airfield and Highway Pavement Specialty Conference, 912-923.

 

NCHRP. 2004. Guide for Mechanistic-Empirical Design of New and Rehabilitated Pavement Structures, Part 1. Itroduction. National Cooperative Highway Research Program, Illinois. USA.

 

Saha, J.; Nassiri, S.; Bayat, A.; Soleymani, H. 2014. Evaluation of the Effects of Canadian Climate Conditions on the MEPDG Predictions For Flexible Pavement Performance, International Journal of Pavement Engineering 15(5): 392-401.

 

Shakhan, M.R.; Topal, A.; Şengöz, B.; Almusawi, A. 2019. Review of the Implementation of the Mechanistic-Empirical Pavement Design Guide. In Proceedings of the 3rd International Students Science Congress, 138-153.

 

Shakhan, M.R.; Topal, A.; Sengoz, B.; Ozturk, H.I. 2021. The Predicted Impact of Design Parameters in Asphalt Concrete Layers on Pavement Performance, Proceedings of the Institution of Civil Engineers - Transport 174(6): 1-18.

 

SIGAR. 2016. Special Inspector General for Afghanistan Reconstruction (SIGAR), 2016. Special Inspector General for Kabul.

 

Thompson, M.R.; Dempsey, B.J.; Hill, H.; Vogel, J. 1987. Characterizing Temperature Effects for Pavement Analysis and Design, Transportation Research Record 12(8): 14-22.


Quoted IJTTE Works



Related Keywords