3. The following time/settlement record was obtained from a consolidation test on a soft clay sample of average initial thickness 19 mm, for a given intensity of loading, drainage being through top and bottom surfaces: Time (min) Deformation (mm) 0.25 0.14 0.282 0.424 2.25 4 0.564 9. 0.839 16 1.019 25 1.148 36 1.231 49 1.28 100 1.4 200 1.48 400 1.55 1440 1.65 (a) Find the coefficient of consolidation, cv, using Cassagrande's log time method. (b) Mark the primary consolidation and secondary compression regions on the deformation-log time graph. (c) Determine the secondary compression index (C). Time (min) 10 0.1 100 1000 10000 0.00 0.20 0.40 0.60 (ww)

3. The following time/settlement record was obtained from a consolidation test on a soft clay sample of average initial thickness 19 mm, for a given intensity of loading, drainage being through top and bottom surfaces: Time (min) Deformation (mm) 0.25 0.14 0.282 0.424 2.25 4 0.564 9. 0.839 16 1.019 25 1.148 36 1.231 49 1.28 100 1.4 200 1.48 400 1.55 1440 1.65 (a) Find the coefficient of consolidation, cv, using Cassagrande's log time method. (b) Mark the primary consolidation and secondary compression regions on the deformation-log time graph. (c) Determine the secondary compression index (C). Time (min) 10 0.1 100 1000 10000 0.00 0.20 0.40 0.60 (ww)

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter11: Compressibility Of Soil

Section: Chapter Questions

Problem 11.14P

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