This thesis presents the results of the experimental work conducted on glass beads in order to investigate the effects of particle size, confining pressure, and surface roughness on the strength properties of the particulate media. Conventional triaxial compression tests were conducted to investigate those effects. Three different sizes of beads were tested: small (diameter = 0.75 1.00 mm), medium (diameter = 1.55 1.85 mm), and large (diameter = 3.30 3.60 mm). The glass beads were subjected to three different confining pressures: 25-, 100-, and 400-kPa. Smooth and etched beads were tested; the etched surface was achieved by submerging the beads in a bath of Hydrofluoric acid. It was found that as the confining pressure increases, the peak stress ratio decreases. Also, it was found that an increase in roughness produces an increase in the peak friction angle. The particle size was found to affect the stress-strain and volumetric strain behavior of the beads; however, a specific trend was not found.
| Identifer | oai:union.ndltd.org:LSU/oai:etd.lsu.edu:etd-0711103-101559 |
| Date | 11 July 2003 |
| Creators | Novoa-Martinez, Brenda |
| Contributors | Khalid A. Alshibli, Dante O. Fratta, Emir Macari |
| Publisher | LSU |
| Source Sets | Louisiana State University |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lsu.edu/docs/available/etd-0711103-101559/ |
| Rights | unrestricted, I hereby grant to LSU or its agents the right to archive and to make available my thesis or dissertation in whole or in part in the University Libraries in all forms of media, now or hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation. |
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