The Mechanistic-Empirical Design Guide (MEPDG)  requires the resilient modulus of unbound and cohesive soil materials to characterize layers for their structural design.
Moisture and temperature variations within the pavement structure are calculated internally using the Enhanced Integrated Climatic Model (EICM).
This difference causes engineers significant confusion about how to appropriately input the resilient modulus in the MEPDG software.
Department of Civil Engineering, Chosun University, 375 Seosuk-Dong, Dong-Gu, Gwangju 501-759, Republic of Korea Received 20 August 2013; Accepted 17 November 2013; Published 20 February 2014Academic Editors: S. Based on each group, this study develops statistical analysis and evaluation datasets to validate these models.
data were categorized in accordance with the AASHTO soil classifications and divided into several groups.
The primary input parameter used for design is the resilient modulus.
For level 1 design, the resilient modulus values of unbound granular materials, subgrade, and bedrock are determined from triaxial tests (AASHTO T307) .
Furthermore, FWD tests were conducted on several Indiana highways in different seasons, and laboratory resilient modulus tests were performed on the subgrade soils that were collected from the falling weight deflectometer (FWD) test sites.
A comparison was made of the resilient moduli obtained from the laboratory resilient modulus tests with those from the FWD tests. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.Stress-based regression models were evaluated using a statistical tool (analysis of variance (ANOVA)) and Z-test, and pertinent material constants ( with routine soil properties were established.The collected database contains 140 data records representing all classes of soils prescribed by AASHTO.Based on AASHTO classification, the fine grain soil group includes A-4, A-6, and A-7-6 soils.The primary objective of this study was to implement MEPDG with the laboratory test procedure for measuring the resilient modulus of unbound base/subbase materials and subgrade soils in Indiana and to determine whether hierarchical design levels of MEPDG inputs should be fully incorporated into the INDOT design procedure.