A relatively loose, uncompacted sandy fill that is originally 6 ft in thickness is found to have a relative density of 40%. Laboratory tests have indicated that the minimum and maximum void ratios of the sandy soil are 0.46 and 0.90, respectively; and the specific gravity of the soil solids is 2.65. (A) Determine the dry unit weight of the loose sand. (Show all pertinent volume-weight relationships and calculations.) (B) Determine the new thickness and dry unit weight of the fill (originally 6-ft thick) if the sandy soil is compacted to relative densities of 50%, 60%, 70%, 80%, 90%, and 100%, respectively. (Notes: The surface area of the fill over which the compaction process s takes place in the field remains virtually constant. Also, show all pertinent volume-weight relationships and calculations.)

A relatively loose, uncompacted sandy fill that is originally 6 ft in thickness is found to have a relative density of 40%. Laboratory tests have indicated that the minimum and maximum void ratios of the sandy soil are 0.46 and 0.90, respectively; and the specific gravity of the soil solids is 2.65. (A) Determine the dry unit weight of the loose sand. (Show all pertinent volume-weight relationships and calculations.) (B) Determine the new thickness and dry unit weight of the fill (originally 6-ft thick) if the sandy soil is compacted to relative densities of 50%, 60%, 70%, 80%, 90%, and 100%, respectively. (Notes: The surface area of the fill over which the compaction process s takes place in the field remains virtually constant. Also, show all pertinent volume-weight relationships and calculations.)

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter6: Soil Compaction

Section: Chapter Questions

Problem 6.7P

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