Comparison of Resedimented with Intact Mudrock Behavior
Finnegan, James.
2020
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Thesis (M.S.)--Tufts
University, 2020.
Submitted to the Dept. of Civil Engineering.
Advisor: John Germaine.
Committee: Richard Plumb, and Lucy Jen.
Keywords: Soil sciences, Geotechnology, and Petroleum geology.
This thesis studies Gulf of Guinea Miocene Mudrock (GoG) samples, provided by Chevron, and compares resedimented to intact engineering ... read moreproperties. GoG required a new processing method to break apart clay floccs. Clay mineralogy is dominated by kaolinite, and plasticity is unusually high for kaolinite based on Atterberg limits. Hydrometer tests had significant bias, likely caused by structured water, abnormally dense water bonded in layers to the surface of the clay particles. CRS tests show that resedimented specimens are less dense than intact specimens at the in situ stress level of 9.5 MPa, and permeability is similar. Mercury porosimetry data show similar pore size distributions. One CRS test was performed on an intact specimen using the same methods, and the intact compression index was very similar to that of the resedimented specimens. However, porosity of the intact specimen was slightly higher, and intact yield stress was much higher.read less - ID:
- 05742587v
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