Study of Geofoam Particle Effects on Improvement Geotechnical Properties of Sand-Clay Mixture

Document Type : Original Article

Authors

1 Department of Civil Engineering, East Azerbaijan Science and Research Branch, Islamic Azad University, Tabriz, Iran. Department of Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran.

2 Department of Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran

Abstract

Nowadays new materials for improving bearing capacity of soils are widely used. Kind of new materials used in this regard are geosynthetics. Geofoam panel type of geosyntethic materials is useful and alternative for backfill in retaining wall or pavement layers. Main idea in this research is study geofoam particles effects on improvement bearing capacity of sand, clay and sand-clay mixtures. Geofoam particles effects on mixture in 0.05, 0.1 and 0.25% percent were considered and sand mixed with clay in 5, 10 and 30% percent. In order to evaluating geofoam particles influence in geotechnical properties of soil mixed some laboratory tests such as compaction, direct shear (in vertical stresses 1,2 and 3 kG/cm2) in saturate and dry (in natural moisture) conditions and permeability tests were performed. Results of this study showed that with increasing 0.05% percent geofoam in soil mixture maximum dry density went up and vertical settlement decreased. At the same time, shear strength of specimens increased. Although, with adding geofoam in specimens permeability went up and drainage condition improved.

Keywords

Asas Journal
Volume 20, Issue 50
May 2018
Pages 43-57

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History

  • Receive Date: 12 February 2018
  • Revise Date: 09 July 2018
  • Accept Date: 06 August 2018

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