A comparison of the behavior of intact and Resedimented Boston Blue Clay (BBC)
Name
810203604-MIT.pdf
Description
Full printable version
Size
11.78 MB
Format
Adobe PDF
Checksum (MD5)
ed91bd8f9be5d4da7e65e485557dccdb
Author(s)
House, Robert Donald
Advisor(s)
John T. Germaine.
Date Issued
2012
Publisher
Massachusetts Institute of Technology
Abstract
Resedimented Boston Blue Clay (RBBC) has been used as an analog test material for research at MIT for decades, due to local variability and the high cost of sampling. However, a comprehensive study of the differences in behavior between intact and resedimented BBC has not been completed recently. This thesis analyzes test data from laboratory CRS and triaxial tests conducted at MIT on intact and RBBC. Typical ranges for compression ratio, hydraulic conductivity, coefficient of consolidation, lateral stress ratio, preconsolidation pressure and peak friction angle of RBBC were within ranges for intact BBC. Ranges for secant friction angle, swell ratio and undrained strength for intact BBC overlapped and were lower than ranges reported for RBBC. Both intact and RBBC CRS data plotted to the right of the sedimentation compression line (SCL) in the Burland (1990) framework, showing significant structure and clay fabric. The Jaky equation (1948) was found to overestimate KO for intact BBC when using the peak friction angle, and underestimate KO when using the secant friction angle. Despite these differences, RBBC should continue to be used as an analog test material for studying clay behavior of BBC. Future research should expand the comparison into different test modes and additional clay mineralogies.
Description
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 93-94).
Subjects
Civil and Environmental Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
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