(2000 ft. x 10 ft.)/30000 sq.ft. = 0.6667 ratio of joint area to
mat area (ratio).
c. Step 3: Weighted pay factor (wpf) for joint is determined as
indicated below:
wpf = joint pay factor + (100 - joint pay factor) (1 - ratio) wpf
= 97.3 + (100-97.3) (1-.6667) = 98.2%
d. Step 4: Compare weighted pay factor for joint density to pay factor
for mat density and select the smaller:
Pay factor for mat density:
98.3%.
Weighted pay factor for joint
density: 98.2%
Select the smaller of the two values as pay factor based on
density: 98.2%
3.11.7
Grade
**************************************************************************
NOTE: The grade and surface smoothness requirements
specified below are for the final wearing surface
only. If there is a requirement to test and control
the grade and smoothness for the intermediate
courses, i.e., when the intermediate courses will be
exposed to traffic, slight modifications to this
specification will be required.
**************************************************************************
Within 5 working days after completion of a particular lot incorporating
the final wearing course, the Contractor shall test the final wearing
surface of the pavement for conformance with specified plan grade
requirements. All testing shall be performed in the presence of the
Contracting OfficerEngineer. The final wearing surface of pavement shall
conform to the elevations and cross sections shown and shall vary not more
than 9 mm 0.03 foot for runways or 15 mm 0.05 foot for taxiways and aprons
from the plan grade established and approved at site of work. Finished
surfaces at juncture with other pavements shall coincide with finished
surfaces of abutting pavements. Deviation from the plan elevation will not
be permitted in areas of pavements where closer conformance with planned
elevation is required for the proper functioning of drainage and other
appurtenant structures involved. The grade will be determined by running
lines of levels at intervals of 7.6 m 25 feet, or less, longitudinally and
transversely, to determine the elevation of the completed pavement surface.
Detailed notes of the results of the testing shall be kept and a copy
furnished to the GovernmentEngineer immediately after each day's testing.
When more than 5 percent of all measurements made within a lot are outside
the 9 or 15 mm 0.03 or 0.05 foot tolerance, the pay factor based on grade
for that lot will be 95 percent. In areas where the grade exceeds the
tolerance by more than 50 percent, the Contractor shall remove the surface
lift full depth; the Contractor shall then replace the lift with hot-mix
asphalt to meet specification requirements, at no additional cost to the
GovernmentOwner. Diamond grinding may be used to remove high spots to meet
grade requirements. Skin patching for correcting low areas or planing or
milling for correcting high areas will not be permitted.
SECTION 02749
Page 34
Previous Page
