4-36.
4-37.
4-38.
4-39.
4-40.
4-41.
Which of the following methods is a
general method used for soil
stabilization?
1.
Modification
2.
Additive
3.
Cementing
4.
Bituminous
The method of soil stabilization to
be used is determined by which of
the following factors?
1.
Soil description
2.
Soil classification
3.
Amount of required
stabilization
4.
Each of the above
The mechanical method of soil
stabilization is accomplished by
mixing what materials?
1.
Soils of different gradations
2.
Cement and soil
3.
Bituminous products and soil
4.
Each of the above
Additives are used for what primary
purpose?
1.
To improve soil strength only
2.
To improve soil durability only
3.
To reduce the thickness
required only
4.
To improve soil quality
When stabilization is achieved by
cementing, the final strength
depends on which of the following
factors?
1.
Amount of cement used
2.
Density achieved during curing
3.
Density achieved during
compaction
4.
Both 2 and 3 above
Learning Objective: Identify types
of stabilizers and the methods used
for determining the type and the
amount of stabilizer required.
Which of the following tests must
be performed before a stabilizer
can be selected?
1.
Moisture content
2.
Sieve analysis
3.
Specific gravity
4.
Bearing tests
4-42.
4-43.
4-44.
4-45.
4-46.
4-47.
4-48.
Cement can be used with
coarse-grained soils that meet what
criteria?
1.
At least 45% retained on a
No. 4 sieve
2.
At least 45% passing a No. 4
sieve
3.
At least 45% retained on a
No. 40 sieve
4.
At least 45% passing a No. 40
sieve
Plasticity index should meet what
criteria when you use a bituminous
material for soil stabilization?
1.
Greater than 30
2.
Less than 30 but greater than
10
3.
Equal to 25
4.
Less than 10
When you choose a stabilizer
additive, which of the following
factors must be considered?
1.
Environmental conditions
2.
Cost
3.
Type of soil quality
improvement desired
4.
Each of the above
Plastic soil-cement is used for
which of the following purposes?
1.
Road repairs
2.
Erosion prevention
3.
Paving ditches
4.
Each of the above
When you add cement to the soil,
which of the following properties
increases ?
1.
Plasticity
2.
Water-holding capacity
3.
All properties
4.
Bearing capacity
Water is used in soil-cement for
what purpose?
1.
For hydration of the cement
2.
To obtain maximum compaction
3.
Both 1 and 2 above
4.
To increase the weight
Soils used for soil-cement must be
well graded to provide proper
aggregate cohesion.
1.
True
2.
False
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