Quantification of Sediment Properties from Pore Structure and Grain Contacts: A Microcomputed Tomography Analysis of SAX04 Sands
2006
Reed, A. H. | Thompson, K. E. | Willson, C. S. | Briggs, K. B. | Richardson, M. D. | Hefner, B. T.
During the Sediment Acoustic eXperiment (SAX04), sediment physical properties (e.g., porosity and permeability), determined by the arrangement of sand grains and the topology of the pore space, were evaluated in two ways: first, packing density in unconsolidated sand was adjusted from minimum to maximum density by vibration; and second, diver-collected cores were impregnated with polyester casting resin to maintain pore and grain morphologies. Sediment pore-morphology and grain data was captured in volumetric x-ray Computed Tomography (CT) images and quantified using a new grain-based algorithm. Porosity was calculated from the image data by voxel counting and permeability was determined using the Kozeny-Carman method, which is determined from porosity and grain size data. Grain contacts, an important determinant of frame modulus, were also determined.
Show more [+] Less [-]Presented at the conference on Boundary Influences in High Frequency, Shallow Water Acoustics, held at the University of Bath, U.K., on 5-9 Sep 2005. Published in the proceedings of the conference on Boundary Influences in High Frequency, Shallow Water Acoustics, p83-90, 2005. Prepared in collaboration with Louisiana State University, Baton Rouge, LA, and University of Washington, Seattle, WA. The original document contains color images.
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