A06_NIFC_Campus_Asphalt_Seal_Coat_SPECS_24JULY2023.pdf

NIFC Campus Asphalt Seal Coat July 24, 2023

PART 1 – GENERAL INFORMATION

A. Summary: The Bureau of Land Management, National Interagency Fire Center

(NIFC), located at 3833 S Development Avenue Boise, Idaho 83705, has a requirement for an application asphalt seal coat with aggregate cover, applied to the existing asphalt concrete pavement surface to renew and seal the surface. Following the seal coat process, line striping will be performed to re-stablish the campus parking and roadway areas. This document specifies the characteristics of the material and details the application workmanship.

B. The campus is comprised of asphalt concrete (AC) surfacing in a combination of parking lots and roadways. The AC surfacing has received miscellaneous patches and sealcoat throughout the years with no formal materials used. The surface is used by passenger vehicles, semi-trucks, and equipment such as forklifts.

C. Work will be done throughout the campus over consecutive weekdays to allow

Government to move vehicles and equipment from one area to the next. Contractor will coordinate with COR to ensure government vehicles and equipment are moved.

D. Administration: Overall administration of this contract shall be by the Contracting

Officer (CO). The CO will appoint a Contracting Officer Representative (COR) to manage the detailed activities of the contract.

E. Installer qualifications: Work shall be accomplished by companies demonstrating 5 years of seal coating experience in the State of Idaho.

F. SUBMITTALS:

1. Contractor shall submit product data to the Government for review. Submit package a minimum of 1 week prior to scheduled work start date. Allow

Government 5 business days to review. Contractor shall not proceed with replacement until receipt of reviewed submittals from the government.

2. Submittal Package shall include:

(a) Seal coat materials: asphalt type and grade, anti-strip additives, cover coat material.

(b) Test results indicating:

i) Cover coat material does not show a loss of more than 40 when tested in accordance with AASHTO T 96 Los Angles Abrasion

Testing, Gradation C.

ii) Cover coat material has retained asphalt film above 95 percent when tested in accordance with AASHTO T 182. Aggregates not meeting this requirement may be used in combination with an antistrip agent, providing the combination meets the 95 percent requirement.

(c) Pavement paint manufacturers certification that paints and beads meet or exceeds specified requirements.

(d) Project Schedule, describing at a minimum; start date, work schedule for each parking lot/roadway, weekend and holiday work expected and total project length.

G. Attachments

1. See Drawings for maps of the Existing Campus

PART 2 – PRODUCTS

A. EMULSIFIED ASPHALT

1. Seal coat – Provide CSS-1, CSS-1h, or HFRS-P1 Emulsified Asphalt for the seal coat.

2. Anti-Strip additive – Product as required to meet the project requirements.

B. COVER COAT MATERIAL

1. Furnish Aggregate cover material consisting of crushed or uncrushed Rock free of Clay, loam or other harmful substances and meeting the following gradation. Sieve analysis will be determined according to AASHTO T 27.

Table 1. Cover Coat Material Gradation

Sieve Size Percent Passing

(By Weight)

3/8” 100

1/4” 90 – 100

No. 8 30 – 66

No. 30 8 – 28

No. 100 0 – 5

2. The cover coat material aggregate to have cleanliness value of not less than

82 in accordance with ITD T 72.

3. 70 percent of by weight of the particles retained on the No. 4 sieve shall have one fractured face or more as determined by AASHTO T-335.

C. PAVEMENT PAINTING

1. Paint to be waterborne with volatile organic compound (VOC) less than 150 g/L.

2. Paint to conform to either the current ITD Waterborne Traffic Line Paint

Specifications (Formula No. 14) or to Federal Specification TT-P-1952-D.

3. Federal Standard Colors:

(a) White 37875: parking isles, stop bars, arrows, no parking zones, fog line, handicapped logo

(b) Yellow 33538: centerline, safety boundaries

(c) Blue 15080: handicapped logo background

4. Glass beads: AASHTO Type I beads.

PART 3 – EXECUTION

A. GENERAL

1. Complete all work in each section as indicated by the individual sheet before moving onto the next section. Refer to the Drawings for areas to be seal coated and painted.

2. Work to comply with Idaho Standards for Public Works Construction (ISPWC)

B. CONSTRUCTION LIMITATIONS

1. Do not apply asphalt when roadway surface or weather conditions would prevent satisfactory construction.

2. Weather Limitations: Do not place the prime coat or fog coat when the air temperature is below 60℉, or when the Engineer determines that weather or surface conditions are detrimental to proper construction.

3. Following are minimum pavement surface temperature for applying emulsified asphalt: 80°F and rising.

4. Do not seal coat when pavement temperatures exceed 140°F.

5. If bleeding on the completed seal coat becomes apparent, cease seal coat operation and resume after corrective actions have been initiated.

6. Do not seal coat when wind velocity exceeds 15 mph.

7. Allow asphalt mixes to cure a minimum of ten days before applying seal coat.

8. Temporary stockpiles to be placed in approved locations.

C. SCHEDULING

1. Prior to moving to next scheduled area of work, contractor to notify COR to confirm work is complete and ready to accept traffic.

D. EQUIPMENT

1. Asphalt applying equipment to meet requirements for proper application.

2. Rotary broom(s) required

3. Only pneumatic tire rollers.

(a) Rollers to meet the requirements for proper rolling.

(b) Do not operate roller at speeds in excess of 8 mph for the first coverage nor in excess of 16 mph for subsequent coverages.

4. Self-propelled aggregate spreader.

(a) Supported by at least 4 wheels equipped with pneumatic tires on 2 axles.

(b) Spreader to be equipped with positive controls so that the required amount of material will be deposited uniformly over the full width required, in a manner acceptable to the Engineer.

E. APPLYING ASPHALT

1. Clean surfaces with powered vacuum sweeper and high-pressure water as required to meet conditions. Do not begin applying asphalt until surface is completely dry and has been approved by Engineer.

2. Apply crack seal to surface in preparation for asphalt application.

3. Protect all drains and expansion joints from seal coat application.

4. Use an Asphalt Distributor designed, equipped, maintained and operated to apply a uniform application of Emulsified Asphalt at and even heat.

5. Apply Emulsified Asphalt at within the range of 0.20 to 0.35 gallons per square yard of surface.

6. Do not dilute Emulsified Asphalt unless directed by manufacturer for specific use.

7. Correct any skipped or deficient areas.

8. Length of spread of asphalt limited to that which trucks loaded with coat material can immediately cover.

9. Under no circumstances is the operation to proceed in such a manner that the asphalt will be allowed to chill, set up, dry, or otherwise impair retention of the cover coat material.

10. Protect all utilities and utility covers by covering with building paper prior to spreading asphalt.

11. Provide Traffic Control to prevent “tracking” of asphalt.

F. APPLICATION OF COVER COAT MATERIAL

1. Spread aggregate within the range of 0.004 to 0.013 cubic yards per square yard immediately following the application of the asphalt.

2. Spread in a manner that at no time the tires of the trucks or spreading equipment touch the uncovered asphalt.

3. Begin rolling immediately behind the spreader. Apply 4 complete roller coverages.

4. Sweep excess material from entire surface by means of rotary brooms, after placing material.

5. Conduct brooming in a manner that does not displace any embedded cover coat material.

6. Pick up and dispose of excess material.

7. 2 days following application perform subsequent pickup type power brooming to ensure surface is free of loose Aggregate to the satisfaction of Engineer.

G. PAVEMENT MARKING

1. Use airless spray-type marking equipment, compatible with waterborne paint, and capable of providing a uniform wet film thickness of 15 ± 2 mils.

2. Prior to application provide pavement cure time minimum of 7 days.

3. Pavement surface must be clean and thoroughly dry.

4. Ambient air temperature must be above 50°F.

5. Paint stripes to be uniform and free of erratic waves.

6. Width and location of marking to be designated in the Contract Documents.

7. Apply paint in accordance with the manufacturer's recommendations.

8. Mix paint thoroughly prior to application.

9. Do not thin paint.

10. Apply paint at a rate of not more than 100 square feet/gallon.

11. Apply glass beads during or immediately following the application of paint in such a manner as to provide good adhesion and reflection.

12. Apply glass beads at a rate of 6 pounds/gallon.

13. All pavement marking to conform to the MUTCD.

14. Provide minimum 2 hour dry time before allowing traffic to enter.

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