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Evaluation of a Sand Bentonite Mixture as a Shaft Borehole Sealing Material
Date
2016-09-29
Author
Akgün, Haluk
Koçkar, Mustafa Kerem
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https://hdl.handle.net/11511/85809
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Evaluation of a sand bentonite mixture as a shaft/borehole sealing material
Akgün, Haluk (2018-11-01)
The mechanical and hydrological characteristics of compacted sand bentonite mixtures with bentonite contents ranging from 5 to 40% were investigated in the laboratory in order to assess their use as a waste isolation material and to select an optimum sand bentonite mixture. Laboratory tests included compaction, compaction permeability, unconfined compression and direct shear tests which led to a recommendation to select a mixture with a bentonite content of 30% for the isolation of underground geological wa...
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This study investigates the performance of an optimum compacted bentonite/sand mixture seal for the isolation of underground waste repositories. Engineering geological tests such as compaction, flow, swelling, mechanical and shear strength tests have been conducted to select an optimum mixture and to recommend a stable bentonite/sand seal length-to-radius ratio (L/a) as far as the factor of safety (F) is concerned. The results of the compaction permeameter tests led to a recommendation to select an optimum ...
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Evaluation of natural zeolite as a viscosity-modifying agent for cement-based grouts
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The effects of natural zeolite on the theological and workability properties of the grout mixtures were studied. Setting times of grouts were also determined as part of the experimental study. For comparison, grout mixtures were also prepared with a commercially available viscosity modifying admixture (VMA). The experimental results show that addition of natural zeolite modifies both the rheological and workability properties of grouts. For a constant superplasticizer (SP) content, an increase in the zeolit...
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H. Akgün and M. K. Koçkar, “Evaluation of a Sand Bentonite Mixture as a Shaft Borehole Sealing Material,” 2016, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/85809.