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Abstract
Abstract
In recent years, procedure of AASHTO (American Association State Highway and Transportation Officials) Guide for Design of Pavement Structures distanced from first empirical procedure and advanced toward mechanistic-empirical procedures. “Guide for Mechanistic-Empirical Design of New and Rehabilitated Pavement Structures” in 2004 and its attached software M-EPDG is the result of this new procedure that AASHTO presented it through projects NCHRP 1-37 A and NCHRP 1-40 B with cooperation of NCHRP (National Cooperative Highway Research Program) and FHWA (Federal Highway Administration) institutions. In this paper, requireddata for software analyzing of three real pavement structures pieces collected from three different climatic areas and pavement structures modeled in software by entering data into software. Modeled sections by this software were analyzed failure, and, regarding to obtained results, common designing pavement structures procedures compared with the new way of AASHTO, and efficiency rate of related software investigated in two different climatic zone of Iran. Toward this process, Save- Hamadan and Qazvin- Boin Zahra cities selected as a case study and then studied. Results of software analyzing showed that the designs of old AASHTO method in tempered climate of country met all criteria of designing but in both of cold and warm areas, some failure at designed pavement structures via this method exceeded from allowed rate and according to presented failure, will be excessed more in future. This destruction in case project of cold area was longitude crack and was rutting of pavement structures subgrade in warm area. Then, probable causes of mentioned failures studied in pavement structures projects and procedures designed for rehabilitation pavement structures for met all of the designated criteria. Also, in Iran some suggestions indicated about required conductions for application of new method of AASHTO.
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References
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References
Ali M., Mokhtar M., Chiesa M., Armstrong P., Cooling change-point model of community-aggregate electrical load, Energy and Buildings, 43 (2011).
Everson J., Kopala E., Lazofson L.,Choe H., Pomerleau D., "Sensor performance and weather effects modeling for intelligent transportation systems (ITS) applications", Proc. SPIE 2344, Intelligent Vehicle Highway Systems, (1995).
Joseph R. Morris, Improving Road Safety in Developing Countries, Transportation Research Board, Washington, D.C., 2006.
Standard Specifications for Roads and Structures, North Carolina, Department of Transportation Raleigh, 2012.
Fulweiler W.H., The Development Of Modern Road Surfaces, VoL., 90,9 No. 3, 155-183, 1999.
Benvegnu T., Plusquellec D., Lemiègre L., Surfactants from Renewable Sources: Synthesis and Applications, Monomers, Polymers and Composites from Renewable Resources, 2008.
Pasilo counseling engineers, http://scipost.wikipg.com/wiki.
American Association of State Highway and Transportation Officials, 444 N Capitol St. NW - Suite 249 - Washington, DC 20001, 2015.
America Metrology Organization, www.bestplaces.net/climatice
Iran Transportation Organization www. tto.ir
Seyed Mahdi Nasimfar, “Modeling of the weather factors effect on furnish performance in different areas in Iran”, M.A thesis, Faculty of Civil Engineering, Sharif Industrial University, 2008.
Iran roads asphalt furnish regulation, Journal of 234, Technical affairs and Criteria codification office, Iran Management and Planning Organization, 2002.