Abstract
The resilient modulus (MR) is one of the most important indicators of performance of geomaterials used in pavement foundation design, and since designed pavements often are not able to fulfill their service life, researchers have been led to evaluate the procedure of resilient modulus characterization of geomaterials used in pavement foundations systems. A preliminary study was conducted on a granular aggregate base material to determine whether conventional MR testing simulates actual stiffness behavior of these materials under actual traffic loads. The results of this study showed that the conventional testing equipment used to measure MR did not simulate actual field behavior of geomaterials because it fails to take into account anisotropic stress conditions, suggesting a need to produce more realistic experimental results by measuring and monitoring anisotropic stress conditions during testing. To respond to this need, a series of advanced MR tests were conducted using a custom designed and manufactured dynamic polyaxial testing system that enabled measurement of the resilient modulus of materials in both vertical and horizontal directions. It was observed that the geomaterial had different stiffness values at each direction and that the ratio of vertical stiffness to horizontal stiffnesses (modular ratios) can be defined to produce a better understanding of the performance of geomaterials used in pavement foundation design. It is believed that the findings of the study will enhance the long term performance and service life of designed pavement systems.
| Original language | English |
|---|---|
| Pages (from-to) | 381-389 |
| Number of pages | 9 |
| Journal | Geotechnical Special Publication |
| Volume | 2021-May |
| Issue number | GSP 326 |
| DOIs | |
| Publication status | Published - 2021 |
| Event | 2021 International Foundations Congress and Equipment Expo: Geoenvironmental Engineering, Geomaterial Modeling, Transporation Geotechnics, and Case Histories, IFCEE 2021 - Dallas, United States Duration: 10 May 2021 → 14 May 2021 |
Bibliographical note
Publisher Copyright:© ASCE.
Funding
This study was supported by the Office of Surface Mining Reclamation and Enforcement (OSMRE), the United States Department of the Interior, under the funding opportunity number: S17AS00005. Endorsement by OSMRE is not implied and should not be assumed. The work described herein was supported in part by the U.S. National Science Foundation via Grant No. 0537244, Dr. Richard J. Fragaszy, Program Manag er. The authors are grateful for this financial support. This study is financially supported by USGS National Earthquake Hazards Reduction Program (NEHRP) under Grant No. G17AP00088 and by NASA under G rant No. 18-DISASTER18-0022. 5HVHDUFK RI - 5HQMLIR &LRFFD ZDV SDUWLDOO\ IXQGHG IURP ³&DPSXV DV D /LYLQJ /DE´ SURJUDP of the Institute for Sustainability, Energy, and Environment (iSEE) at the University of Illinois at Urbana-Champaign and the Corsetti Fellowship. The retrieval of the glacial till cores was funded by Carbon Credit Sales Fund at the Facilities and Services, University of Illinois. The experiments described and the resulting data presented herein, unless otherwise noted, were funded under PE 0602784A, Project T53 "Military Engineering Applied Re VHDUFK ´ 7DVN under Contract W913E518C0008, managed by the US Army Engineer Research and Development &HQWHU (5'& 7KH ZRUN GHVFULEHG LQ WKLV SDSHU ZDV FRQGXFWHG DW 5RZDQ 8QLYHUVLW\¶V &HQWHU IRU Research and Education in Advanced Transportation Engineering Systems (CREATEs), Mullica Hill, NJ. Permission was granted by the Director, Geotechnical and Structures Laboratory to publish this information. The authors also acknowledge and appreciate the support of various suppliers including: Troxler Electronic Laboratories who provided density gauges; Lehigh Technologies, Inc. who provided materials, Aerix Industries who provided a concrete foaming machine; and Aero Aggregates who provided glass foam aggregates. The authors would like to thank the TxDOT for granting the funds and support personnel for research project 06944. The authors would like to acknowledge the University of Texas Arlington team members Cody undbeL rg, and Kevin Weinhold for their help during data collection. The authors gratefully acknowledge the support and generosity of the NSF Industry - 8QLYHUVLW\ &RRSHUDWLYH 5HVHDUFK &HQWHU , 8&5& SURJUDP IXQGHG µ&HQWHU IRU ,QWHJUDWLRQ RI &RPSRVLWHV LQWR ,QIUDVWUXFWXUH &,&, ¶ VLWH DW 7$08 16) 3'P ra k'asUh Balan), for its partial support towards this work. The authors would also like to acknowledge Thamer Yacoub and Sina Javankhoshdel of Rocscience Inc. This study was sponsored by the Army Research Office and was accomplished under Grant Numbers W911NF -16-1-0336, W911NF -18-1-0068 and W911NF -20-1-0238. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Office or the U.S. Government. The authors would like to express their gratitude to Mr. Gary Hubbard at Greater Bossier Economic Development Foundation and Dr. Shams Arafat for their assistance in soil sampling works in the field. We thank Swarajit Sarker for assistance with Figure 1. W e are also immensely grateful to Graphic Packaging International Inc. for kindly proving black liquor and Millennium Galvanizing for kindly providing SSA. The authors want to sincerely acknowledge the competitive research subprogram of the Louisiana Board of Regents for funded project LEQSF(2017 -20)-Rd-A11 and Region 6 Environmental Protection Agency P2 for grant NP - 01F55301 – 0. The two grants provided financial support for conducting the research presented in this paper. Financial support was provided by the Colombian Administrative Department of Science, Technology and Innovation (COCL IENCIAS) , Scholarship Program No. 757-2016, and the Florida Department of Transportation (FDOT), Grant No. BDV24 TWO 977 -29. The support of the funding agencies is greatly appreciated. This research was supported by the Iowa Department of Transportation under IHRB Project TR-725. This support is gratefully acknowledged. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the sponsor. The authors wish to thank Paul Kremer for his guidance and help during instrumentation; Haluk Sinan Coban , Sajjad Satvati, Qingwei Meng and Ziqiang Xue for their assistance in field installation. The authors also acknowledge the hard work contributed by Masrur Mahedi to the laboratory and fieldwork that was critical to the successful completion of this project. The authors would also like to gratefully acknowledge the financial support from the National Science Foundation under Grant No. CMMI -1804822.
| Funders | Funder number |
|---|---|
| Carbon Credit Sales Fund | |
| HQWHU IRU | |
| HQWHU IRU Research and Education in Advanced Transportation Engineering Systems | |
| NEHRP | G17AP00088 |
| Region 6 Environmental Protection Agency | NP - 01F55301 – 0 |
| US Army Engineer Research and Development &HQWHU | |
| National Science Foundation | 0537244, CMMI -1804822 |
| National Aeronautics and Space Administration | 18-DISASTER18-0022 |
| Army Research Office | W911NF -16-1-0336, W911NF -20-1-0238, W911NF -18-1-0068 |
| U.S. Department of the Interior | S17AS00005 |
| U.S. Geological Survey | |
| Louisiana Board of Regents | LEQSF(2017 -20)-Rd-A11 |
| Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS) | 757-2016 |
| Florida Department of Transportation | BDV24 TWO 977 -29 |
| Office of Surface Mining Reclamation and Enforcement | |
| Iowa Department of Transportation | TR-725 |