Problem 1: The table below present the results of a standard proctor test of a borrow pit soil. Mass of wet soil +Mould in 3.69 3.75 3.82 3.92 3.98 3.93 (kg) Water content (%) 8 6.2 9.8 11.5 12.4 13.3 The volume and the mass of the mould was 1000cm and 2 kg, respectively. The specific gravity of the soil is 2.72, determine the following : a) Plot the compaction curve of this soil. b) Optimum water content c) Maximum dry density. d) Plot the zero air void line. e) Determine the degree of saturation at the maximum dry density.
Problem 1: The table below present the results of a standard proctor test of a borrow pit soil. Mass of wet soil +Mould in 3.69 3.75 3.82 3.92 3.98 3.93 (kg) Water content (%) 8 6.2 9.8 11.5 12.4 13.3 The volume and the mass of the mould was 1000cm and 2 kg, respectively. The specific gravity of the soil is 2.72, determine the following : a) Plot the compaction curve of this soil. b) Optimum water content c) Maximum dry density. d) Plot the zero air void line. e) Determine the degree of saturation at the maximum dry density.
Chapter2: Loads On Structures
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Transcribed Image Text:Problem 1:
The table below present the results of a standard proctor test of a borrow pit soil.
Mass of wet soil +Mould in
3.69
3.75
3.82
3.92
3.98
3.93
(kg)
Water content (%)
6.2
8
9.8
11.5
12.4
13.3
The volume and the mass of the mould was 1000cm³ and 2 kg, respectively. The specific gravity
of the soil is 2.72,
determine the following :
a) Plot the compaction curve of this soil.
b) Optimum water content
c) Maximum dry density.
d) Plot the zero air void line.
e) Determine the degree of saturation at the maximum dry density.
Problem 2:
The above borrow pit soil has a natural bulk unit weight of 14.5 kN/m and water content of
4.5%. An embankment is to be constructed using this soil and the specification require the fill to
be compacted to 96% of the above proctor compaction. Determine the cost for 50,000 m of the
embankment considering the following:
a) The distance between the borrow pit and the embankment is 55 km
b) The cost of transporting 1 m of the borrow pit soil to the site is 16 OMR/km.
c) The cost of compaction is 8 OMR/m.
Problem 3:
plot the variation of the total, neutral, and effective stresses with the depth under the center of
the
embankment,
refer to problem 2
Elevation (m)
Water table
above.
The
embankment has a
0.
height of 10 m and
supported by a ground having the soil profile shown in
the figure below,
SAND. e= 0.67, G=2.68
silty CLAY. w=34%, G=2.75
Pervious Rock
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