- 375 - SECTION 517 -- PRIME COAT
517.01 Description
1.This work shall consist of the application of asphaltic materials on bases, roadbeds or other surfaces as sh own in the contract or as designated by the Engineer.
517.02 Material Requirements
1.Asphaltic materials for prime coat shall be the type and grade shown in the contract and shall conform to the requirements of Section 1030.
517.03 Construction Methods
1.The Contractor shall blade off all loose material, then sweep the surface with mechanical brooms until the surface is substantially dust free.
2.a. The Contractor shall distri bute the asphaltic material at a uniform rate of 0.30 Gal/SY (1.36 L/m2).
b.The distributor shall meet the requirements of Subsection 501.02, Paragraph 5.
c.Hand sprayers may be used to coat small and irregular sections.
3.Asphaltic material shall not be applied if the ambient temperature is below 50°F (10 C).
4.The surface shall be dry before asphaltic materials are applied.
517.04 Method of Measurement
1.Asphaltic materials are measur ed by the gallon (liter) at 60°F (16C).
517.05 Basis of Payment
1.P a y I t e m P a y U n i t Prime Coat Asphaltic Oil Gallon (Gal) [Liter (L)]
2.Any amount of Prime Coat asphaltic oil which is outside the specified property ranges of Table 517. 01, shall be paid for at the contract unit price multiplied by the pay factor determined in Table 517.01. If the resultant pay factor for the material indicates rejection as an option, the Engineer will determine if the non-compliant material will be removed.
517.05 Prime Coat
- 376 - Table 517.01 Tolerances and Pay Factors Specified Property Deviation Tolerance Pay Facto r Residue from distillation, volume percent of sample by difference. ≤ -1.0% 1.00 -1.1% to -3.0% 0.85 -3.1% to -5.0% 0.70 > -5.0% 0.40 or Reject Pay Factors for Tests for all other Properties Specified* 1.00 for deviation of ± less than or equal to 10% 0.75 for a deviation of ± greater than 10% to less than or equal to 25% 0.40 or Reject for deviation of ± greater than 25% * When the specification requirement is stated as a percentage, the test result deviation from the s pecification will be divided by the specification value. The result ing deviation percentage is then applied to the listed criteria. Note: When more than one specified property exceeds specification tolerances, t he single largest Pay Factor Reduction will be the one applied.
3.When disputes arise in test resu lts, the Department will select an independent laboratory for referee test ing on the remainder of the sample. The identity of the independent labo ratory will not be revealed until the selected laboratory has completed the referee testing.
a.Only the Contractor can init iate dispute resolution, and request referee testing. Should the Contractor request referee testing, it shall be submitted in writing to the Department within 30 days of receiving the written notification of deficiency.
b.If the independent lab’s tests indicate failing results and pay deductions equal to or greater than the Department’s, the Contractor will reimburse the Department for the cost of testing. If the independent lab’s tests indicate that the material meets s pecifications or is at a pay deduction less than the Department’s, the Department will assume the cost of testing. When the independent lab’s tests indica te a pay deduction, the lesser of the Department’s and the independent la b’s deductions will be applied.
4.Payment is full compensation for all work described in this Section. - 377 - SECTION 518 -- FABR IC REINFORCEMENT
518.01 Description
1.This work shall require the Contractor to furnish and place a reinforcing fabric, crack repair system on joints or cracks as shown in the contract or as directed by the Engineer.
518.02 Material Requirements
1.The repair fabric shall consist of fiberglass grid and shall conform to the following requirements: Table 518.01 Mechanical Properties Material Fiberglass reinforcement grid coated with an elastomeric polymer Grid size 0.5 inch x 0.5 inch or 1.0 inch x 1.0 inch Tensile strength across 1100 pounds / inch Minimum Tensile strength along l e550 pounds / inch Minimum Weight 16 oz. / square yard Minimum Roll width 4.5 feet Minimum
2.Fabric reinforcement materials approved for use are shown on the Department’s Approved Products List.
518.03 Construction Methods
1.The fabric reinforcement shal l be applied immediately before the placement of the bituminous overlay. The materials and application method shall resist shoving and lifting during pl acement of the bituminous overlay.
2.The Contractor shall follow the recommendations of the manufacturer in placing the fabric reinforcing system, including preparing the surface, joints, and cracks on which the system is to be applied. Substitutions involving any element of a system will not be allowed without the written approval from the manufactu rer and concurrence of the Engineer.
3.Manufacturer installation inst ructions shall be provided to the Engineer two weeks prior to installation.
4.The fabric shall be placed on t he leveling course asphaltic concrete pavement centered on the crack or jo int. The fabric shall be placed at temperatures of 50 oF or above. The pavement surface on which the fabric is to be placed shall be dry and free of dirt, debris and other foreign matter.
5.Immediately after placement, the fabric shall be rolled with a pneumatic roller to ensure a good bonding between the fabric and the roadway. At no time will traffic, ex cept minimal construction traffic, be allowed on the placed fabric.
6.The application of the materials will be accepted by visual examination and satisfactory initial performance.
518.04 Method of Measurement
1.Fabric reinforcement repair will be measured by the total length in linear feet (meters).
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 409–410 of 1,048.