The characterization of unbound materials in the mechanistic–empirical pavement design guide (MEPDG), also known as the 2002 design guide,is reviewed, and this characterization is applied to Minnesota subgrades.The main emphasis is on the collection of k1-, k2-, and k3-parameters for Minnesota ﬁne-grained soils and the procedure for the interpretation of the resilient modulus test to provide an input to the multilayer elastic theory (MLET) analysis (Level 2 input). This is an important aspect of adaptation of the MEPDG, because the guide recommends measurement of resilient moduli from laboratory testing, but the procedure does not specify how to interpret the test data to obtain an input for an MLET analysis. The resilient modulus test results from 23 samples collected from several Minnesota locations were used to provide information for the nonlinear ﬁnite element program and multilayer elastic theory program.The obtained elastic moduli were compared with the MEPDG recommended ranges for subgrade modulus of elasticity based on the soil classiﬁcation (Level 3 inputs). The MEPDG Level 3 ranges were found to be reasonable.
|Numero di pagine||12|
|Rivista||Transportation Research Record|
|Stato di pubblicazione||Published - 2006|
All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
- Mechanical Engineering