Date of Graduation
5-2018
Document Type
Thesis
Degree Name
Bachelor of Science in Civil Engineering
Department
Civil Engineering
Advisor/Mentor
Coffman, Richard
Committee Member/Reader
Barry, Michelle
Abstract
A centrifuge soil testing device, currently operated by researchers at the University of Arkansas, was used to develop a technique to determine a hydraulic conductivity placement window. The purpose of this research was to develop a placement window by means of a centrifuge instead of by means of a panel board. Soil specimens were created at standard PRcotor energy and at 50 percent of Standard Proctor energy at -3 percent of optimum, -1.5 percent of optimum, two specimens at optimum, +1.5 percent of optimum, and +3 percent of optimum water content. Values of hydraulic conductivity for the respective specimens were determined to be 1.90E-08, 2.18E-08, 2.10E-08, 1.85E-08, 2.00E-08, and 1.80E-08. Specimens were observed to have been centrifuged at too large of a rotation speed which induced too high of stresses on the specimen, and too large of a gradient across the specimens. Piping, slurry formation, and resedimentation was observed in several of the specimens; specifically piping was observed in the specimens that had porous bronze filters instead of porous stone filters.
Keywords
Landfill liner, centrifuge, placement window, hydraulic conductivity
Citation
Thomas, G. (2018). Development of a Hydraulic Conductivity Placement Window using Centrifuge Techniques. Civil Engineering Undergraduate Honors Theses Retrieved from https://scholarworks.uark.edu/cveguht/44
Included in
Civil Engineering Commons, Environmental Engineering Commons, Geotechnical Engineering Commons