Journal Published Online: 19 September 2014
Volume 37, Issue 6

Effect of Confinement on Creep Behavior of EPS Geofoam



Time-dependent deformation under sustained loading or creep is an important consideration in the long-term performance of expanded polystyrene (EPS) geofoam. The design of EPS geofoam fills is mainly based on limiting working stresses to produce tolerable deformations. Results from unconfined uniaxial creep tests have provided justification for such design criteria. With different types of applications involving submergence and higher surcharge loads, creep deformations under confining pressures have been occurring. A series of creep tests were performed on different densities of EPS geofoam with and without confining pressures. The results showed confining pressures can significantly affect the creep responses of EPS geofoam. Effects of confining pressures on creep deformations were more pronounced at lower densities.

Author Information

Birhan, Amsalu
Syracuse Univ., Syracuse, NY, US
Negussey, Dawit
Syracuse Univ., Syracuse, NY, US
Pages: 9
Price: $25.00
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Stock #: GTJ20140010
ISSN: 0149-6115
DOI: 10.1520/GTJ20140010