EPS geofoam design parameters for pavement structures

Xiaoodng Huang, Dawit Negussey

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

2 Citations (Scopus)

Abstract

Most of the current geofoam design methods adopt the working stress concept. To design pavement structures with geofoam as subgrade according to the AASHTO and other pavement design guides, the resilient modulus, California Bearing Ratio (CBR), and modulus of subgrade reaction of geofoam need to be determined. The standard test methods are not suitable for geofoam because they usually prescribe higher stress than can be applied on geofoam. This paper presents modified tests methods designed for geofoam to determine the three parameters. Modified tests showed geofoam has resilient modulus unacceptable for subgrade by normal standards. CBR values interpreted by a modified method yielded higher values than conventional methods but still less than acceptable soils. Modified plate load tests indicated low values of modulus of subgrade reaction for geofoam. The concrete slab-geofoam composite subgrade was evaluated by numerical modeling. By considering the composite action of the concrete slab and geofoam, higher resilient modulus and modulus of subgrade reaction values were obtained. Based on the modified tests and modeling, an approach for selecting appropriate geofoam design parameters is proposed.

Original languageEnglish (US)
Title of host publicationGeotechnical Special Publication
Pages4544-4554
Number of pages11
Edition211 GSP
DOIs
StatePublished - 2011
EventGeo-Frontiers 2011: Advances in Geotechnical Engineering - Dallas, TX, United States
Duration: Mar 13 2011Mar 16 2011

Other

OtherGeo-Frontiers 2011: Advances in Geotechnical Engineering
CountryUnited States
CityDallas, TX
Period3/13/113/16/11

Fingerprint

subgrade
pavement
Pavements
Bearings (structural)
Concrete slabs
slab
Composite materials
design method
Soils
modeling
parameter
test
method
soil

Keywords

  • Design
  • Foam
  • Parameters
  • Pavements

ASJC Scopus subject areas

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

Cite this

Huang, X., & Negussey, D. (2011). EPS geofoam design parameters for pavement structures. In Geotechnical Special Publication (211 GSP ed., pp. 4544-4554) https://doi.org/10.1061/41165(397)465

EPS geofoam design parameters for pavement structures. / Huang, Xiaoodng; Negussey, Dawit.

Geotechnical Special Publication. 211 GSP. ed. 2011. p. 4544-4554.

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

Huang, X & Negussey, D 2011, EPS geofoam design parameters for pavement structures. in Geotechnical Special Publication. 211 GSP edn, pp. 4544-4554, Geo-Frontiers 2011: Advances in Geotechnical Engineering, Dallas, TX, United States, 3/13/11. https://doi.org/10.1061/41165(397)465
Huang X, Negussey D. EPS geofoam design parameters for pavement structures. In Geotechnical Special Publication. 211 GSP ed. 2011. p. 4544-4554 https://doi.org/10.1061/41165(397)465
Huang, Xiaoodng ; Negussey, Dawit. / EPS geofoam design parameters for pavement structures. Geotechnical Special Publication. 211 GSP. ed. 2011. pp. 4544-4554
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