Soil Resilient Modulus Regressed from Physical Properties and Influence of Seasonal Variation on Asphalt Pavement Performance

摘要: Subgrade soil, as the critical underlying support for other pavement layers and traffic loads, should be stiff enough to maintain integrity of structures smoothness surface. The resilient modulus, an indicator subgrade stiffness, is essential input in American Association State Highway Transportation Officials (AASHTO) Mechanistic-Empirical Pavement Design Guide (MEPDG). At level 1 MEPDG, MEPDG generalized model required describe modulus coefficients this are used design. change has raised interest many state highway agencies made it necessary convert old test data into new ones model. In study, universal models soil were obtained through regression results 13 soils Tennessee. two also compared. There a potential risk that from may mistakenly instead those consequence improper use was demonstrated comparison between miscalculated real moduli. correlated physical properties, which provided alternate time-saving economical method obtain 2 inputs. at different post-compaction water contents, allow estimation response under seasonal moisture variation subgrade. Rutting roughness typical sections analyzed investigate influence on performance. showed had significant effect and, subsequently, It recommended considered analysis