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Effects of Granulometric Parameters and Mix Proportions on the Shear Strength of Binary Granular Mixtures.Unknown Date (has links)
Geotechnical engineers are commonly faced with the need to perform ground
improvement techniques to achieve the necessary bearing capacity for a project. Some of
the most common techniques involve the excavation and replenishment of problematic
geomaterial with one of better quality. Common projects, such as road embankments and
retaining walls, also require the selection of backfill material. The guidelines for selecting
backfill material are typically limited to complying with certain gradation bands, relative
densities and allowable fines content.
Round-grained silica sand, and beach sand from Boca Raton, FL, were used to generate
a total of 16 binary granular mixtures containing different amounts of finer material, for
which a series of direct shear tests were conducted. Based on the experimental results, it
may be possible to provide an alternative criteria for selecting backfill material based on
granulometric parameters and the amount of finer material. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2016. / FAU Electronic Theses and Dissertations Collection
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Effect of median grain size ratio on the compaction behavior of binary granular mixesUnknown Date (has links)
Optimization of compaction in granular material without the use of traditional ground improvement methods may be possible by optimizing the percentage of finer material and the median grain size ratio in binary soil mixtures. In this study, the median grain size ratio D50/d50 was explored as a fundamental parpmeter affecting the compaction characteristics of binary mixes made from natural sands as opposed to singular measurements such as fines content and mean grain size traditionally used to represent granular soils. A total of 18 binary granular mixes were synthetically generated from natural sands obtained from Longboat Key, Florida and evaluated through grain size analysis, laboratory compaction and determination of relative density. Results indicate that the D50/d50 ratio shows promise as a fundamental parameter for compaction optimization in binary mixes with values exceeding six approaching the densest packing configuations. / by Tara Devine Brenner. / Thesis (M.S.C.S.)--Florida Atlantic University, 2012. / Includes bibliography. / Mode of access: World Wide Web. / System requirements: Adobe Reader.
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