Laboratory and field measured moduli of unsurfaced pavements on weak subgrade

Debakanta Mishra, Erol Tutumluer, Maziar Moaveni, Yuanjie Xiao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents findings on the effectiveness of field modulus determinations and modulus based assessment of constructed pavement foundation geomaterials, i.e. subgrade soil and base/subbase unbound aggregate material. Full-scale unsurfaced pavement test sections were constructed on controlled strength weak subgrades and tested to failure for studying effects of aggregate quality on pavement performance. Differences in aggregate quality were assessed by changes in aggregate properties such as particle angularity, fines content and plasticity of fines. In-situ moduli of the constructed layers were measured using both light weight deflectometer (LWD) and GeoGaugeTM type field devices. Tests were conducted on the engineered subgrade as well as on the finished aggregate layer surface with data collected consistently from the same locations using the two devices. Both the GeoGaugeTM and the LWD were successful in identifying anomalies in construction conditions, i.e., increasing or decreasing trends in moduli. However, field achieved dry densities and aggregate qualities could not be linked to the field modulus values, which also differed from the laboratory-measured resilient modulus properties.

Original languageEnglish (US)
Title of host publicationGeoCongress 2012
Subtitle of host publicationState of the Art and Practice in Geotechnical Engineering
Pages1381-1390
Number of pages10
Edition225 GSP
DOIs
StatePublished - Dec 1 2012
EventGeoCongress 2012: State of the Art and Practice in Geotechnical Engineering - Oakland, CA, United States
Duration: Mar 25 2012Mar 29 2012

Publication series

NameGeotechnical Special Publication
Number225 GSP
ISSN (Print)0895-0563

Other

OtherGeoCongress 2012: State of the Art and Practice in Geotechnical Engineering
CountryUnited States
CityOakland, CA
Period3/25/123/29/12

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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