Measuring and Modeling Proportion-Dependent Stress-Strain Behavior of EPS-Sand Mixture<sup>1</sup>Source: International Journal of Geomechanics:;2010:;Volume ( 010 ):;issue: 006DOI: 10.1061/(ASCE)GM.1943-5622.0000062Publisher: American Society of Civil Engineers
Abstract: A geofoam was produced by blending expanded polystyrene (EPS) beads and sands in proportions. The
formed mixtures, known as EPS-sands, were 26–63% lighter than general earth fills (e.g.,
sand). Consolidated-drained (CD) triaxial compression tests were conducted on EPS-sand mixture
specimens to observe their stress-strain characteristics, specifically, the stress-strain responses
in relation to the EPS contents (0.5, 1.5, and 2.5% by weight) used in the mixtures and confining
pressures (100, 200, 300 to 400 kPa) loaded on the specimens. The EPS content and confining pressure
were found to influence the stress-strain and volumetric strain behavior of the mixtures. Increasing
EPS content led to decreased shear strength and increased volumetric strain. Increasing confining
pressures enhanced the strength of the mixture. EPS-sand mixtures underwent a shear contraction
throughout the CD tests. The optimum EPS bead content (i.e., the one reasonably balancing the unit
weight, strength, and deformation) was in the order of 0.5% by weight. EPS content dependent strain
increment equations were derived by compromising Cam-clay and modified Cam-clay, and used to model
the stress-strain characteristics of EPS-sand mixtures. The established equations were verified
being able to depict the stress-strain observations of EPS-sand specimens, at least for the ranges
of EPS contents and confinements considered in this study.
|
Collections
Show full item record
contributor author | An Deng | |
contributor author | Yang Xiao | |
date accessioned | 2017-05-08T21:45:15Z | |
date available | 2017-05-08T21:45:15Z | |
date copyright | December 2010 | |
date issued | 2010 | |
identifier other | %28asce%29gm%2E1943-5622%2E0000073.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/61457 | |
description abstract | A geofoam was produced by blending expanded polystyrene (EPS) beads and sands in proportions. The formed mixtures, known as EPS-sands, were 26–63% lighter than general earth fills (e.g., sand). Consolidated-drained (CD) triaxial compression tests were conducted on EPS-sand mixture specimens to observe their stress-strain characteristics, specifically, the stress-strain responses in relation to the EPS contents (0.5, 1.5, and 2.5% by weight) used in the mixtures and confining pressures (100, 200, 300 to 400 kPa) loaded on the specimens. The EPS content and confining pressure were found to influence the stress-strain and volumetric strain behavior of the mixtures. Increasing EPS content led to decreased shear strength and increased volumetric strain. Increasing confining pressures enhanced the strength of the mixture. EPS-sand mixtures underwent a shear contraction throughout the CD tests. The optimum EPS bead content (i.e., the one reasonably balancing the unit weight, strength, and deformation) was in the order of 0.5% by weight. EPS content dependent strain increment equations were derived by compromising Cam-clay and modified Cam-clay, and used to model the stress-strain characteristics of EPS-sand mixtures. The established equations were verified being able to depict the stress-strain observations of EPS-sand specimens, at least for the ranges of EPS contents and confinements considered in this study. | |
publisher | American Society of Civil Engineers | |
title | Measuring and Modeling Proportion-Dependent Stress-Strain Behavior of EPS-Sand Mixture1 | |
type | Journal Paper | |
journal volume | 10 | |
journal issue | 6 | |
journal title | International Journal of Geomechanics | |
identifier doi | 10.1061/(ASCE)GM.1943-5622.0000062 | |
tree | International Journal of Geomechanics:;2010:;Volume ( 010 ):;issue: 006 | |
contenttype | Fulltext |