PROPOSAL NOTE 414-93
(Rev. 6-15-99)
COUNTY _____________
SECTION _____________
_____________
ASPHALT CONCRETE SURFACE SMOOTHNESS REQUIREMENTS
DESCRIPTION: The surface tolerance requirements for the asphalt concrete pavement surface course shall be modified for all mainline lanes as specified herein. Surface courses for all other pavement areas (ramps, shoulders, crossovers, etc.) shall meet the requirements of 441.15. If the final surface course is 803, this specification shall apply to the pavement course placed before the final surface course.
MATERIALS AND EQUIPMENT: Initial approval and project verification per Supplement 1058.
SURFACE SMOOTHNESS REQUIREMENTS: The requirements of 441.15 surface tolerances are waived for mainline lanes. The Contractor shall place the asphalt concrete surface course, on the mainline lanes, to an average Profile Index of 12 inches per mile or less, with no individual areas of the surface having a deviation (bump or dip) greater than 0.4 inches in 25 feet or less. These profile requirements shall terminate 17 feet from each bridge approach slab or existing pavement.
For the first three days, the profile of each day's paving shall be run by the next working day. After the first three days of profiling, profile measurements for each day's work shall be presented to the Engineer at least every third day or before zone opening to traffic, whichever is sooner. Before performing each day's profile testing, the Contractor shall notify the Engineer. The Contractor shall test the asphalt concrete surface course in the wheel paths with the profiler and develop a Profile Index Trace in accordance with California Test 526, 1978. The wheel paths will be located parallel to the centerline of the pavement and approximately 3.0 feet measured transversely, inside all lane edges. The path of the profiler shall be parallel to the pavement edge at all times. Any dirt and debris on the surface of the pavement shall be removed by the Contractor before the profiler measurements. Necessary traffic control and survey stationing for any measurements shall be provided by the Contractor. The Contractor shall provide the profile trace using a 0.2 inch blanking band to the Engineer for evaluation. The evaluation shall be made in accordance with California Test 526, 1978, to detect any areas with deviations greater than 0.4 inches in 25 feet or less, in addition to the Profile Index for each 0.10 mile section of paving.
For each project five random 0.1 mile sections (including some problems sections) shall have the blanking band changed to 0.1 inch and 0.0 inch and the traces reprinted. IRI , Ride Number and these printouts along with a trace at 0.20 blanking band shall be sent to the Office of Highway Management, attention Flexible Pavements Engineer.
CORRECTIVE WORK REQUIRED: All surface areas having deviations greater than 0.4 inches in 25 feet or less shall be removed by the Contractor and replaced by asphalt concrete meeting the contract requirements. After removal of all individual deviations greater than 0.4 inches, corrective work shall be performed, if necessary, to reduce the average Profile Index to 10 inches per mile or less. In addition, any 0.1 mile section having an initial Profile Index greater than 12 inches per mile shall be corrected to reduce the Profile Index to 10 inches per mile or less.
This additional corrective work shall be performed, at the Contractor's expense, using one of the following methods:
OVERLAYING: Corrections made by overlaying the pavement area shall be performed by the Contractor using asphalt concrete meeting the contract requirements. The overlay lift shall extend the full width of the underlying pavement surface and have a finished compacted thickness sufficient to correct the roughness and produce a final surface meeting the specified surface smoothness. If the overlay does not meet the longitudinal smoothness required, a second overlay will not be allowed and corrective action shall then be removal and replacement.
REMOVING AND REPLACEMENT: Corrections made by removal shall be replaced with asphalt concrete meeting the contract requirements.
On those sections where corrections are made, the pavement shall be tested to verify that corrections have produced a Profile Index of 10 inches per mile or less.
METHOD OF MEASUREMENT: The Profile Index will be determined for each 0.10 mile section of paving. On those pavement sections where corrections are performed, a second profilograph run will be made to verify that corrections have produced an average Profile Index of 10 inches per mile or less per 0.10 mile section, with no deviations greater than 0.4 inch in 25 feet or less.
For the purposes of determining pavement sections where pay adjustments will be necessary, the pavement will be evaluated in 0.10 mile sections, for each lane width.
PAY ADJUSTMENTS WITH INCENTIVES: Contract unit price adjustments of the completed asphalt concrete surface course will be made using the following schedule when the Contractor is entitled to incentive payments or elects to accept contract unit price adjustments instead of reducing the Profile Index:
PROFILE INDEX PRICE ADJUSTMENT
(inches per Mile per 0.1-Mile Section) (Percent of Pavement Unit Bid Price)
1 or less 105
Over 1 to 2 103
Over 2 to 3 102
Over 3 to 4 101
Over 4 to 7 100
Over 7 to 8 98
Over 8 to 9 96
Over 9 to 10 94
Over 10 to 11 92
Over 11 to 12 90
Over 12 Corrective work required
Pay adjustment for incentives will only be based on the initial measured Profile Index before any corrective work. The price adjustment schedule for 100 percent pay or pay reductions applies to pavement sections where corrective work has been completed.
The unit bid price adjustment will apply to the total theoretical cubic yards representing the total thickness of the asphalt concrete pavement paved for each 0.10 mile long section for the lane width represented by the profile. The total theoretical cubic yards shall not include the cubic yard quantities of any asphalt treated free draining base or open graded asphalt friction course paved on this project.
No payment will be made for any pavement that has an average Profile Index greater than 12 inches per mile per 0.10 mile section until corrective work has been completed by the Contractor and the pavement retested to verify the average Profile Index has been reduced to 10 inches per mile per 0.10 mile section or less.
BASIS OF PAYMENT: The cost of all labor, equipment, and materials to meet this specification shall be included in the contract unit prices for the applicable pavement items.
REVIEWER'S NOTE: This note should be used with 446 asphalt concrete surface courses when the project:
1. Involves constructing or resurfacing greater than 1 centerline mile of a divided highway with 2 or more lanes in each direction; and,
2. The total new pavement thickness is greater than 4 inches without planing the existing surface or greater than 3 inches if the existing pavement is planed.