12-18.
What functions does a prime coat
of bituminous material serve?
1.
The prime coat penetrates the
base course about 2 inches,
fills most of the voids, and
promotes adhesion between the
base and previous bituminous
applications
2.
The prime coat penetrates the
base course about 1/4 inch,
fills most of the voids,
promotes adhesion between the
base and bituminous
applications placed on top of
it, and waterproofs the base
3.
The prime coat waterproofs the
wearing surface and controls
dust and loose aggregates
4.
The prime coat increases
compaction and binds the
aggregates and fines together
1219.
An underprimed area can be
corrected by performing which
of the following operations?
1.
Applying twice the amount
of prime material
2.
Applying a layer of sand,
then repriming over it
3.
Applying twice the thickness
of asphalt over the
underpriced area
4.
Applying a second coating
of the prime material
1220.
What is an indication that the
base course is overpriced?
1.
A free film of prime material
remains on the base after a
45hour curing period
2.
The area looks dry and dark
after a 24hour curing period
3.
A free film of prime material
remains on the base after an
8hour curing period
4.
The area looks and feels damp
after a 12hour curing period
12-21.
A tack coat is an application
of asphalt to an existing paved
surface that provides a bond
between which of the following
surfaces?
1.
The subsurface and subgrade
surface
2.
The finish surface and the
subgrade surface
3.
The existing surface and the
asphalt material to be placed
on it
4.
The subsurface and the base
surface course
1222.
An area that has an excess of tack
coat material can be corrected by
taking which of the following
actions?
1.
Apply heat until the excess
bitumen drys
2.
Spread clean, dry sand on
the area
3.
Skip over the area and pave
it last
4.
Dig up the area and replace
the material
Learning Objective:
Recognize
the types of asphalt pavement
construction.
12-23.
What is the major difference
between plant-mix construction
asphalt and mixinplace
construction asphalt?
1.
The type of asphalt and
aggregate used in plant-mix
construction is much heavier
and stronger than that used
in mixinplace construction
asphalt
2.
Plant-mix construction asphalt
requires a different rolling
technique
3.
Plant-mix construction asphalt
is prepared in a central
mixing plant
4.
Plant-mix construction asphalt
requires a different curing
time
90