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 takes place in the field remains virtually constant. Also, show all pertinent volume-weight relationships and calculations.) (C) Plot the variation of fill thickness with relative density using MS Excel software, and draw a brief 2-line conclusion. (D) Plot the variation of dry unit weight with relative density using MS Excel software, and draw a brief 2-line conclusion.

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 takes place in the field remains virtually constant. Also, show all pertinent volume-weight relationships and calculations.) (C) Plot the variation of fill thickness with relative density using MS Excel software, and draw a brief 2-line conclusion. (D) Plot the variation of dry unit weight with relative density using MS Excel software, and draw a brief 2-line conclusion.

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

See similar textbooks

Similar questions

Problem 1.9 The maximum and minimum void ratios for a sand are 0.805 and 0.501 respectively. The field density test performed on the same soil has given the following results: 3 p= 1.81 Mg/m², w = 12.7%. Assume G₁ = 2.65. Compute the density index.
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 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 takes place in the field remains virtually constant. Also, show all pertinent volume-weight relationships and calculations.) (C) Plot the variation of fill thickness with relative density using MS Excel software, and draw a brief 2-line conclusion. (D) Plot the variation of dry unit weight with relative density…
the maximum and minimum void ratio for sand are 0.805 and 0.501 respectively . The field density test performed on the same soil has given the following result Bulk density 1.81Mg/m3 . water content 12.7% .Assume the specific gravity 2.65 and volume 1m3 . compute the dry density of solids and volume of voids ratio and relative density of sand.
A loose, uncompacted sand fill 1.8 m. depth has a relative density of 40% Laboratory test indicated that the minimum and maximum void ratios of the sandare 0.46 and 0.90 respectively. Specific gravity of the solids of the sand is 2.65.a) Determine the void ratio of the sand having a relative density of 40%b) What is the dry unit weight of the sand?c) If the sand is compacted to a relative density of 75%, what is the decrease in the thickness of the 1.8m fill?
An undisturbed sample of sand has a dry weight of 4.20 lb and occupies a volume of 0.038 ft3. The soil solids have a specific gravity of 2.75. Laboratory tests performed to determine the maximum and minimum densities indicate void ratios of 0.42 at the maximum density and 0.92 at the minimum density. Compute the relative density of this material.
A sample of coarse sand was found to have a void ratio of 0.87 and 0.52 in its loosest and densest states respectively. The in-situ density and water content of the sand were 1.95 g/cm3 and 23%. Determine the relative density of the sand in the field. Choose the corret answer below a.0.53b.0.59c.0.55d.0.57
A loose compacted sand fill is 1.81 m in depth and has a relative density of 41%. Laboratory tests indicated that the sand's minimum and maximum void ratios are 0.47 and 0.91 respectively. The specific gravity of the solids of the sand is 2.65. Find; (a) Dry unit weight of the sand. (b) Void ratio of the sand having a relative density of 40%. (c) If the sand is compacted to a relative density of 75% what is the decrease in the thickness of the 1.8m fill?
A saturated soil sample has a water content of 34% and void ratio of 0.92. Determine the effective and moist unit weight. Another soil has an effec-tive unit weight of 10.29 kN/m3 and has a void ratio of 0.62, what is this soil’s bulk density and degree of saturation at a water content of 14%. Assume a logical value of Gs with at least 4 significant figures.
A sample of sand above the water table was found to have a naturalmoisture content of 10% and a unit weight of 120 lb/ft^3. Laboratory tests on a driedsample indicated values of void ratio as 0.45 and 0.90, for the densest and looseststates respectively. Compute the (a) degree of saturation, and (b) relative density.Use GS=2.65.
For a sand sample, the maximum and minimum possible void ratios were determined in the laboratory to be 0.94 and 0.33, respectively. The relative density of the sand is 0.75 and the moisture content is 10%. The specific gravity is Gs = 2.65. Determine the moist unit weight of the sand compacted in the field?
sample of gray silty clay has a mass of 126 kg. Laboratory tests results give a moist density (ρ) of 2.05 g/cm3, a specific gravity of solids (Gs) of 2.71, and moisture content (w) of 15.7%. First determine all entries in the phase diagram. Then determine the void ratio (e), the porosity (n), the degree of saturation (S), the dry density (ρd), the dry unit weight (Ƴd), and the moist unit weight (Ƴ)