4-49.
4-50.
4-51.
4-52.
4-53.
4-54.
Which of the following soils is the
most desirable for soil-cement
construction?
1.
Silty and clayey soil that
contains a relatively high
percentage of clay
2.
Sandy soil that is deficient in
fines
3.
Sandy and gravelly soil with
more than 55% passing a No. 4
sieve
4.
Sandy and gravelly soil that
contains 10% to 35% silt and
clay
What is the first requirement for
quality soil-cement?
1.
Proper moisture content
2.
Adequate cement content
3.
Density of the soil
4.
Proper compacting equipment
When you perform laboratory tests,
composite samples should not be
used because they could provide
misleading and inaccurate results.
1.
True
2.
False
The required cement content for
nonfrost areas is determined by
which of the following tests?
1.
Moisture-density
2.
Freeze-thaw
3.
Wet-dry
4.
Both 2 and 3 above
The wet-dry test takes approx-
imately how long to complete?
1.
1 day
2.
2 days
3.
24 days
4.
108 days
Your sample is classified as a
gravelly soil. What is the passing
criteria for this type of soil when
the freeze-thaw test has been
performed on the sample?
1.
At least 7% weight loss
2.
Not more than 7% weight loss
3.
At least 14% weight loss
4.
Not more than 14% weight loss
4-55.
The principle requirement of a
soil-cement mixture is to withstand
exposure to the weather. By
meeting this requirement, another
requirement is also met.
What is
that other requirement?
1.
Strength
2.
Moisture content
3.
Plasticity
4-56.
The use of bitumen has which of the
following effects on the soil?
1.
Decreases the load-bearing
capacity
2.
Decreases cohesion
3.
Increases the resistant to
4-57.
4-58.
4-59.
water action
4.
Each of the above
In frost areas, tar is the
recommended bituminous binder.
1.
True
2.
False
When pollution control concerns
exist, what type of bituminous
product is recommended?
1.
Asphalt cement
2.
Asphalt emulsion
3.
Tar
4.
Cutback asphalt
For a well-graded aggregate with
little to no mineral filler, which
of the following bituminous
materials should you use?
1.
MC-3000
2.
MC-250
3.
SS-1h
4.
SC-70
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