This item of work involves construction
of a non-reinforced Portland cement concrete pavement on a prepared
surface. The same methods and practices
are utilized in the construction of 452
Pavement with some exceptions listed below.
The major difference between 451
and 452
Pavement is the elimination of the steel reinforcing mesh in the 452
specification.
Non-reinforced Portland
cement concrete pavement is constructed in accordance with 451
with the following exceptions:
1. Reinforcing mesh specified in 451.08
is not required.
2. Dowels are required in transverse contraction joints
in mainline pavement, ramps, acceleration/deceleration lanes, and
collector/distributor lanes, but not in concrete shoulders adjacent to the
above-listed pavements unless the contraction joints are within 500 feet (150
m) of a pressure relief joint.
3. The spacing of contraction joints in 452
is 15 feet (4.6 m) unless the 452
Pavement is placed as a shoulder tied to 451
or 305
Pavement. In this case, the joints
in the 452
Pavement must match the spacing, alignment, sawing, and sealing
requirements of the adjacent pavement.
4. Construction joints in 452
Pavement must not be located closer than 6 feet (1.8 m) from another
parallel joint.
Non-reinforced Portland
cement concrete pavement is measured by the square yard (square meter) of
pavement completed and accepted. All of
the provisions of 451
method of measurement apply to 452.
Payment for 452
Pavement is the same as for 451
Pavement. Payment is made for
accepted quantities of pavement by the square yard (square meter) at the
contract bid price. If pavement is found
to be deficient in thickness or compressive strength, the Department will pay a
reduced price according to 451.19.
There is no additional
payment for any pavement constructed and found to have an average thickness in
excess of the thickness specified.
1. Document subgrade/subbase
preparation.
2. Document contraction, expansion, and longitudinal
joints dowel and tiebar sizes, type, coating,
support, placement, spacing.
3. Document forms set 100 percent bearing, correct
alignment and grade, rigid, clean and oiled.
4. Document length of lap, clearance maintained on steel
mesh.
5. Document contraction joint spacing, dowels oiled,
dowel assembly tie wires removed, number and size of pins used to hold dowel
assembly, and alignment of dowels.
6. For slip form construction document:
a. Test section results.
b. Approval of slip form paver.
c. Alignment of dowels using MIT Scan-2.
d. Corrective action as required.
7. Document concrete placement, including all quality
control testing, method of placement, finishing, tining,
curing (type and amount), stamping of stationing, and weather conditions.
8. Document use of HIPERPAV software, time of sawing, and depth and width
of sawed joints.
9. Document coring for thickness verification and
results.
10. Record results of beam breaks and opening to traffic.
11. Measure length and width for pay.
12. Document on CA-D-3A
or CA-D-3B or other approved forms.