Abstract
Many polymeric materials are recently used in geotechnical practice for enhancing the engineering properties of soils. Among the various polymers, this study aims at investigating the geotechnical properties of silica sand coated with polystyrene(PS), which is rarely studied in geotechnical engineering. The polystyrene coated sand was prepared by polymerizing styrene monomer on the surface of silanized sand with median diameter of 0.467 mm. Testing specimens were prepared at 3 different initial relative densities (30, 50 and 70%) by air pluviation. Comprehensive experiments, including one-dimensional compression test with bender elements and triaxial test, were performed to observe the change in geotechnical properties due to the coating of PS on sand surface. The results demonstrate that the adsorbed polymer plays different roles according to strain levels. At very small strain, the polymer on the sand surface may increase the interparticle contact area by applying additional adhesion force between soil particles, leading to an increase in Gmax. However, with an increase in strain level, the polymer will act as the lubricant between sand particles; therefore, the coated sand can show increased compression index and decreased friction angle.
Original language | English |
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Title of host publication | 7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019 |
Editors | Erdin Ibraim, Alessandro Tarantino |
Publisher | EDP Sciences |
ISBN (Electronic) | 9782759890644 |
DOIs | |
Publication status | Published - 2019 Jun 25 |
Event | 7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019 - Glasgow, United Kingdom Duration: 2019 Jun 26 → 2019 Jun 28 |
Publication series
Name | E3S Web of Conferences |
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Volume | 92 |
ISSN (Print) | 2555-0403 |
ISSN (Electronic) | 2267-1242 |
Conference
Conference | 7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019 |
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Country/Territory | United Kingdom |
City | Glasgow |
Period | 19/6/26 → 19/6/28 |
Bibliographical note
Publisher Copyright:© The Authors, published by EDP Sciences.
ASJC Scopus subject areas
- General Environmental Science
- General Energy
- General Earth and Planetary Sciences