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Full-Text Articles in Geotechnical Engineering
Experimental Study Of Hydraulic Conductivity Of A Soil-Bentonite Cutoff Wall, Landon Crawford Barlow
Experimental Study Of Hydraulic Conductivity Of A Soil-Bentonite Cutoff Wall, Landon Crawford Barlow
Master’s Theses
Soil-bentonite (SB) cutoff walls are commonly employed in the US to control groundwater flow and subsurface contaminant migration. In these applications, both the short-term (as built) integrity of the barrier and the potential for degradation in the integrity of the barrier over time are of critical importance. Although many laboratory studies have been conducted to investigate the performance of SB cutoff walls as hydraulic barriers and the various factors affecting this performance, field investigations are scarce. With support from the National Science Foundation, a 200 m long, 7 m deep, and 0.9 m wide SB cutoff wall has been designed, …
Restricted Salt Diffusion In A Geosynthetic Clay Liner, Michael A. Malusis, Jong Beom Kang, Charles D. Shackelford
Restricted Salt Diffusion In A Geosynthetic Clay Liner, Michael A. Malusis, Jong Beom Kang, Charles D. Shackelford
Faculty Journal Articles
No abstract provided.
Membrane Efficiency Of A Dense Prehydrated Gcl, Michael A. Malusis, Akmal Daniyarov
Membrane Efficiency Of A Dense Prehydrated Gcl, Michael A. Malusis, Akmal Daniyarov
Other Faculty Research and Publications
No abstract provided.
Chemical Compatibility Of Model Soil-Bentonite Backfill Containing Multiswellable Bentonite, Michael A. Malusis, Matthew D. Mckeehan
Chemical Compatibility Of Model Soil-Bentonite Backfill Containing Multiswellable Bentonite, Michael A. Malusis, Matthew D. Mckeehan
Faculty Journal Articles
The objective of this study was to evaluate the chemical compatibility of model soil-bentonite backfills containing multiswellable bentonite (MSB) relative to that of similar backfills containing untreated sodium (Na) bentonite or a commercially available, contaminant resistant bentonite (SW101). Flexible-wall tests were conducted on consolidated backfill specimens (effective stress =34.5 kPa) containing clean sand and 4.5–5.7% bentonite (by dry weight) using tap water and calcium chloride (CaCl2) solutions (10–1,000 mM) as the permeant liquids. Final values of hydraulic conductivity (k) and intrinsic permeability (K) to the CaCl2 solutions were determined after achieving both short-term termination criteria as …
Compressibility And Hydraulic Conductivity Of Zeolite-Amended Soil-Bentonite Backfills, Catherine Hong, Charles D. Shackelford, Michael A. Malusis
Compressibility And Hydraulic Conductivity Of Zeolite-Amended Soil-Bentonite Backfills, Catherine Hong, Charles D. Shackelford, Michael A. Malusis
Faculty Journal Articles
The effect of zeolite amendment for enhanced sorption capacity on the consolidation behavior and hydraulic conductivity, k, of a typical soil-bentonite (SB) backfill for vertical cutoff walls was evaluated via laboratory testing. The consolidation behavior and k of test specimens containing fine sand, 5.8 % (dry wt.) sodium bentonite, and 0, 2, 5, or 10 % (dry wt.) of one of three types of zeolite (clinoptilolite, chabazite-lower bed, or chabazite-upper bed) were measured using fixed-ring oedometers, and k also was measured on separate specimens using a flexible-wall permeameter. The results indicated that addition of a zeolite had little impact …
Hydraulic Conductivity Of Model Soil-Bentonite Backfills Subjected To Wet-Dry Cycling, Michael A. Malusis, Jeffrey C. Evans, Seungchoel Yeom
Hydraulic Conductivity Of Model Soil-Bentonite Backfills Subjected To Wet-Dry Cycling, Michael A. Malusis, Jeffrey C. Evans, Seungchoel Yeom
Faculty Journal Articles
The potential for changes in hydraulic conductivity, k, of two model soil-bentonite (SB) backfills subjected to wet-dry cycling was investigated. The backfills were prepared with the same base soil (clean, fine sand) but different bentonite contents (2.7 and 5.6 dry wt %). Saturation (S), volume change, and k of consolidated backfill specimens (effective stress = 24 kPa) were evaluated over three to seven cycles in which the matric suction, Ym, in the drying stage ranged from 50 to 700 kPa. Both backfills exhibited susceptibility to degradation in k caused by wet-dry cycling. Mean values of …