Measuring shear strength parameters of polymer-added bentonite-sand mixtures in laboratory experiments
| Autor: | Hakki O. Ozhan |
|---|---|
| Přispěvatelé: | Özhan, Hakkı O. |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Dry unit weight
chemistry.chemical_classification lcsh:GE1-350 Materials science 0211 other engineering and technologies Compaction 02 engineering and technology Polymer 021001 nanoscience & nanotechnology Bentonite-Sand Mixtures Laboratory Experiments chemistry Tap water Friction angle 021105 building & construction Bentonite Cohesion (geology) Direct shear test Composite material 0210 nano-technology lcsh:Environmental sciences |
| Zdroj: | E3S Web of Conferences, Vol 92, p 11014 (2019) |
| ISSN: | 2267-1242 |
| Popis: | 7th International Symposium on Deformation Characteristics of Geomaterials, IS-Glasgow 2019 -- 26 June 2019 through 28 June 2019 -- -- 149312 2-s2.0-85069679444 In order to evaluate the shear strength parameters of an anionic polymer-added bentonite-sand mixture that was permeated with tap water, Proctor compaction tests and direct shear tests were performed on the mixture with a bentonite content of 15% by mass. The polymer content in the polymer-bentonite mixture was chosen as 0.5, 1, 2, 5, 10, 15 and 20% by mass, respectively. According to the results, maximum dry unit weight (?dmax) first decreased as the polymer content was increased to 1% and then, increased. ?dmax of 20% polymer-added mixture and the mixture without polymer addition was measured as 17.55 and 17.28 kN/m3, respectively. Test results indicated that cohesion (c) increased and internal friction angle (ø) decreased due to polymer addition. 2% polymer addition caused an increase of 42 kPa in c but a decrease of 4.2° in ø. As the polymer content increased, maximum shear strength of the mixture (?max) increased. ?max increased from 171.8 to 197.8 kPa as the polymer content was increased from 0 to 2%. As a result, 2% anionic polymer-added bentonite-sand mixture provided sufficient increase in the shear strength of the mixture. © The Authors, published by EDP Sciences. |
| Databáze: | OpenAIRE |
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