Environmental considerations AASHTO mechanistic-empirical pavement design guide: impacts on performance

From National Research Council Canada

Alternative titleEnvironmental considerations in the new AASHTO pavement design guide: part 2, impacts on performance
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DOIResolve DOI: https://doi.org/10.1061/(ASCE)CR.1943-5495.0000126
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  1. National Research Council of Canada. Construction
FormatText, Article
Journal titleJournal of cold regions engineering
ISSN0733-9445
1943-541X
Volume31
Issue3
Subjectpavement; environmental factors
Abstract
This paper is a continuation of an earlier overview on the subject and presents the results of a sensitivity analysis that assessed the ability of the Mechanistic Empirical Pavement Design Guide (MEPDG) to portray the impact of temperature and moisture content on flexible pavements performance. The study used the most common asphalt concrete (HL3) and unbound materials (granular A and silty sand) used in Canada. Two binders (PG 52-34 and PG 58.28) and three moisture conditions (dry, wet and optimum) were chosen. Designs performed using level3 of analysis for unbound materials and level 1 for asphalt concrete showed the MEPDG is sensitive to binder performance grades as well as to climatic zones (cold vs. warm). However, the MEPDG showed limited sensitivity to the state of unbound materials where permanent deformation showed negligible changes between wet, dry and optimum conditions.
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LanguageEnglish
Peer reviewedYes
NRC numberNRC-CONST-56185
NPARC number21275435
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Record identifier7549584d-86db-4e6c-89f5-992a4ae77051
Record created2015-07-13
Record modified2020-06-04
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