Evaluation of Resilient Modulus of Subgrade and Base Materials in Indiana and Its Implementation in MEPDG

Author:

Ji Richard1ORCID,Siddiki Nayyarzia2,Nantung Tommy1,Kim Daehyeon3

Affiliation:

1. INDOT Office of Research and Development, 1205 Montgomery Street, West Lafayette, IN 47906, USA

2. INDOT Materials and Testing, 100 N. Senate Avenue, Indianapolis, IN 46204, USA

3. Department of Civil Engineering, Chosun University, 375 Seosuk-Dong, Dong-Gu, Gwangju 501-759, Republic of Korea

Abstract

In order to implement MEPDG hierarchical inputs for unbound and subgrade soil, a database containing subgradeMR, index properties, standard proctor, and laboratoryMRfor 140 undisturbed roadbed soil samples from six different districts in Indiana was created. TheMRdata were categorized in accordance with the AASHTO soil classifications and divided into several groups. Based on each group, this study develops statistical analysis and evaluation datasets to validate these models. Stress-based regression models were evaluated using a statistical tool (analysis of variance (ANOVA)) andZ-test, and pertinent material constants (k1,k2andk3) were determined for different soil types. The reasonably good correlations of material constants along withMRwith routine soil properties were established. 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. Correlations between the laboratory resilient modulus and the FWD modulus were developed and are discussed in this paper.

Funder

Chosun University

Publisher

Hindawi Limited

Subject

General Environmental Science,General Biochemistry, Genetics and Molecular Biology,General Medicine

Reference20 articles.

1. Publication NCHRP 1-37A Final Report,2004

2. Estimation of Resilient Modulus of Subgrade Soils for Design of Pavement Structures

3. Publication no. FHWA/IN/JTRP-2005/23,2006

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