ABSTRACT
This research evaluated the application of post consumer glass as a cementing agent in
underground mine backfills. The underlying theory indicates that glass is pozzolanic and,
when used in finely divided form, reacts as an activator to generate binding products, thus
contributing to the development of backfill strength. The objective of the research was to
evaluate the strength performance of backfills when Normal Portland Cement (NPC) is
replaced with various percentages of post consumer glass.
The research evaluated the performance of backfills prepared using tailings from three
candidate mines, namely Stobie, David Bell and Kidd Creek. Each backfill was prepared
using unique recipes, and the strength and other properties were evaluated at cure times
of 7, 14, 28, 56, 112 and 224 days. Laboratory work involved visual, physical and
chemical material characterization followed by strength evaluations.
Results of strength assessment reveal that glass, when incorporated as part of the binder
in backfill development is reactive, and can contribute to the strength of backfill. Further
analysis of the results also indicated that the reactivity of glass may be affected by the
incorporation of slag within the recipe, the availability of lime and the level of hydration
of the binders.
The research concluded that, at 15 % glass replacement of NPC, backfill prepared with
David Bell tailings, NPC and glass can achieve improved or equivalent strength
performance compared to backfill prepared with David Bell tailings and NPC. NPC and
slag outperformed backfills prepared with NPC, slag and glass at all replacement levels,
using tailings from Kidd Creek and Inco-Stobie. However, future work should be
designed to maximize the effect of specific pozzolan (for example glass) and material
properties (aggregates) on backfill strength performance. / Thesis (Master, Mining Engineering) -- Queen's University, 2008-01-29 15:09:30.281
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:OKQ.1974/1002 |
| Date | 30 January 2008 |
| Creators | Sargeant, Aubrey Lancelot |
| Contributors | Queen's University (Kingston, Ont.). Theses (Queen's University (Kingston, Ont.)) |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English, English |
| Detected Language | English |
| Type | Thesis |
| Format | 2229822 bytes, application/pdf |
| Rights | This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner. |
| Relation | Canadian theses |
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