Scope of Work Roads (1).pdf

PARTl

1.1

GENERAL

SCOPE

REPAIR OF ASPHALT

FCC FORREST CITY COMPLEX

1300 Dale Bumpers Road

Forrest City, Ar

STATEMENT OF WORK

The intent of these specifications is to describe acceptable, materials, and construction methods to repair and/or replace ifrequired due to the existing conditions of the asphalt located in the area of the institution. Contractor will prepare road base for the application of hot asphalt for repairs needed to the Medium Perimeter Road, And the Roads connecting warehouse to medium parking lot as well as to rear gate of the Medium Institution, These repairs wills consist of patching holes approximately 6500 SF. and filling cracks along the specified areas. Contractor will have approximately 120 days from notice to proceed to complete this project.

It is the responsibility of the contractor to furnish all labor, supervision, materials, equipment, shop drawings, necessary to complete this contract in accordance with these specifications, , and other contract documents. All contracted work shall be coordinated with and under the auspices of the Government Contracting Officer, his/her designee, the Contracting Officers Technical Representative (COTR).

The work under this description

1.2 DESCRIPTION :6500 square foot cut out and Crack Repair

Contractor shall provide material to complete approximately 6500 sf of asphalt for repair. These repairs will consist of a complete squared cut out and removal of all materials to include base layer of up to 2 foot from top of base or at depths to meet compaction rate applicable to repairs.

Grind and Repair approximately 2000 linear foot of cracks. These cracks will exceed 1 inch in width and repairs will be made by rotomilling (grinding) crack with a minimum of 4 inches on either side approximately 2 inches deep. Once grinding has been completed the crack will then be cleaned from debris and repaired with hot asphalt per specifications 1.4 .

Repair approximately 3500 linear foot cracks. For cracks less than 3/8 inch contractor will ensure area can be cleaned and cleared of grasses and debris. Repairs will be made using rubber Bituminous Emulsion Crack Sealant STE-I {Snap-Tack} or approved equal as specified in 1.5

The contractor shall submit a certified analysis of the proposed asphalt from the refinery laboratory to the COR for review and approval. The COR shall reserve the right to make check test of the asphalt received on the project site. And if the asphalt is not in accordance to the certification requested he has the right to reject the material.

The asphalt required by these specifications shall conform to the requirements of the Asphalt institute for the type and grade needed for the repairs.

1.3 QUALITY ASSURANCE

Substitutions: No substitutions will be considered unless written request for approval has been submitted by the bidder and received by the owner at least 10 days prior to the date of receipt of bids. Prior to being awarded this work, the Contractor must show proof that the company has asphalt construction background, to receive the required warranty, and is a qualified installation contractor of asphalt, as specified.

1.4 CRACK AND JOINT SEALANT

General The Work under this Section shall consist of the performance of all plant, labor and supervision, equipment, and material for performing all operations required for the preparation and application of a hot bituminous emulsion and three-eighths inch (3/8") chip applied as a crack and joint sealant. The Work under this Section shall be performed after the asphalt pavement has been rotomilled or as directed by the Engineer.

B. Materials Asphalt materials shall be approved by the Engineer prior to use (a certified analysis by the refinery laboratory with each shipment of asphalt to the project may be acceptable). The Engineer shall reserve the right to make check tests of the asphalt received on the job and if the certified analysis proves to be unsatisfactory individual check tests will be required. The asphalt required by these specifications shall conform to the requirements of the Asphalt Institute for the type and grade shown below: Asphalt for Bituminous Emulsion Crack Sealant STE- I {Snap-Tack} or approved equal

The aggregate shall consist of crushed gravel (three-eighths inch (3/8") minus and sand) evenly mixed and shall be sound, durable, and free of adherent coatings of clay, dirt, or any other objectionable matter. Not less than sixty percent (60%) by weight of crushed gravel shall consist of pieces having two or more faces being freshly fractured. The aggregate shall have the following gradation: Sieve Designation Percentage By Weight Passing 3/8" 100 #4 85-100 #8 0- 25 #200 0-2

All aggregate equipment shall meet federal and State of Arkansas safety standards and shall be sufficient in size and mechanical condition to meet the requirements and to produce the Work.

The equipment will be inspected jointly by the Municipality and the Contractor and shall be approved by the Engineer before any Work is started. Any units found defective shall be immediately repaired or replaced before starting Work on this project. The Contractor shall notify the Engineer twenty-four (24) hours in advance for equipment:

Article 1.5 Construction

Crack and joint sealant shall be applied to cracks or joints that have dimensions greater three-eighths inch (3/8") and three-quarter inch 3/4") in width as directed by the Engineer. The sealant shall be applied in conformance with the manufacturer' s instructions and to full depth of the crack. Cracks less than three-eighths inch (3/8") in width will be filled with sealant (STE-I).

The cracks shall be cleaned and all loose material shall be blown out to the full depth of the crack. The interior of the crack shall be completely dried and existing asphalt surfaces shall be exposed to enable bonding of the sealant.

All cracks shall have a minimum depth of one inch (l "). If the crack does not have a minimum depth of one inch (1 "), the crack shall be deepened to a minimum of one inch (4") through the use of a router or similar device approved by the Engineer. The area covered with the emulsion/aggregate treatment shall be a minimum of six inches (6") on either side of the crack.

Crack and joint sealant shall be prepared and applied in conformance with the manufacturer' s instructions. All extruded sealant shall be removed and feathered to transition to the existing pavement surface. Crack sealant shall not be applied during cold weather, after sunset, or when the surface and crack are wet. The crack sealant shall be applied only when the temperature of the atmosphere is above sixty degrees (60°) Fahrenheit.

The application of the bituminous material shall be made by means of a pressure distributor of approved type. Undiluted amounts of bituminous material (STE-I) shall be distributed at the rate two-tenths to thirty-five hundredths (0.20 to 0.35) gallons per square yard. The quality of material as measured by the volume-measuring device shall not vary from the true quantity, as herein specified, by more than five percent (5%). The bituminous material shall be applied at a temperature between one hundred and twentyfive and one hundred and eighty-five degrees (125° and 185°) Fahrenheit.

The hot bituminous emulsion shall be applied with a hand held spray bar, with a nozzle pressure range from twenty (20) pounds per square inch (psi) to forty-five (45) pounds per square inch (psi), to distribute the bituminous material uniformly to the full depth of the crack without filling

it. Aggregate distribution shall follow the emulsion applications closely as possible. It shall be placed prior to the emulsion breaking to ensure the greatest adherence.

The loose aggregate shall be removed and all crack repairs shall be broomed and cleaned before the asphalt overlay is installed. For wide cracks or other openings in the existing asphalt surface, which in the opinion of the Engineer are too large for crack sealing, the Engineer shall direct the Contractor to remove and replace pavement.

Asphalt pavers shall be self-propelled units provided with a heated vibratory screed. Grade and cross slope shall be controlled through the use of automatic grade and slope control devices. The paver screed control system shall be automatically actuated by the use of an erected string-line or a mobile string-line (ski) at least thirty feet (30 ') in length on the high side of the paver. Grade control shall be used on either (a) both the high and low sides, or (b) grade control on the high side and slope control on the low side.

Rollers shall be self-propelled, reversible, and equipped to maintain clean and straight contact surfaces. Heat shall be maintained on pneumatic tires by skirting or other approved devices. The number, weight, and type of rollers furnished shall be sufficient to obtain the required density and surface requirements while the mix is in a workable condition. One pneumatic and a minimum of one vibratory roller shall be furnished and operated in a workmanlike manner by the Contractor. There shall be at least one operator for each roller.

Pneumatic tired roller shall ride on not less than seven uniformly sized and uniformly inflated smooth tires mounted on wheel rims of twenty inch (20") minimum diameter. The rear group of tires shall align behind and cover the spaces between the forward group of tires. Tires shall be inflated, and the roller ballasted, to provide a uniform (plus or minus five [5] pounds per square inch) minimum ground contact weight of seventy (70) pounds per square inch, unless a lower weight is requested in writing by the Engineer. If a pneumatic roller experiences a pick-up problem, t

C. Use adequate numbers of skilled workmen who are thoroughly trained and experienced in the necessary crafts and who are completely familiar with the specified requirements and the methods needed for proper performance of the work in section.

PART2

2.1

PRODUCTS

STANDARDS EQUIPMENT

A. All equipment must be approved and cleared prior to entry.

B. General All equipment furnished by the Contractor shall be maintained in a sound mechanical condition. Equipment shall be serviced and lubricated away from the paving site;

units that drip fuel , oil and/or grease shall be removed from the Project until such leakage is corrected to the satisfaction of the Engineer.

C. Asphalt Mixing Plant All plants, used by the Contractor, shall be designed, coordinated and operated to produce a mix uniformly within the job- mix tolerances as listed herein and in accordance with AASHTO M-156. The plant may be either a weightbatch type or a volumetric proportioning, continuous/drum mixing type, provided the equipment has demonstrated that it is suitable for producing finished mixtures complying with the job-mix formula specified herein. .

The plant shall be equipped with the necessary equipment for storing, handling, drying, heating and mixing the aggregate and asphalt. Satisfactory means shall be provided for aggregate and asphalt control as to quantity and temperature. Adequate safety measures shall be provided on stairs, gears, pulley, chains, sprockets, and all other dangerous moving parts.

Contractor shall calibrate the asphalt plant not more than thirty (30) days in advance of production and furnish copies of the data to the Engineer at least one day prior to asphalt concrete production.

PART2

2.2

PRODUCTS

INSTALLATION CONSTRUCTION

The substrate must be clean, dry and sound. Remove dust, laitance, grease, curing compounds, waxes, foreign particles and any previously applied potentially incompatible coatings by scarifying, chipping, wire brushing, acid etching, or pressure washing. If pressure washing or any other liquid method is used for prep, substrate should be fully rinsed, and allowed to completely dry. If the surface is not prepared properly, product adhesion will fail and warranties will be voided.

The road repair work is located on the institutional grounds contractors will have to work closely with the COR and other staff coordinate traffic detours and traffic control. The COR shall provide final approval of the traffic control plan prior to starting work. Prepare the site, traffic signage, and secure the area from public access for the duration of the work.

For large areas Saw cut and remove the existing asphalt paving in the area as designated by COR Re-compact the existing base material to 95% compaction. New base must be installed using aggregate specified where needed. Proof roll and perform compaction testing to identify unsatisfactory areas of base material that does not reach the compaction requirement. Rework (scarify, dry, re-compact) and/or replace existing base material as necessary to achieve the required compaction.

Weather Limitations Asphalt concrete mixture shall not be placed when it is raining or when rain is imminent, on a saturated surface, on an unstable/yielding roadbed, when the base material is frozen, or when weather conditions prevent proper handling or finishing of the mixture. Asphalt concrete mixture shall not be placed unless the surface temperature is forty-five degrees (45°) Fahrenheit or warmer and the ambient air is at least thirty-two degrees (32°) Fahrenheit and not descending. Air temperature shall be measured in the shade away from heat sources at the paving site

Preparation of Area to be Paved The area to be paved shall be true to line and grade, having a smooth dry, compacted surface prior to the start of paving operations. The area to be paved shall be free from all loose asphalt and foreign material.

Contractor shall notify the Engineer, a minimum of twenty-four (24) hours prior to paving, that the newly constructed, rotomill planed, or existing surface, has been prepared in conformance with the Drawings and Specifications and are ready to be paved. Engineer or his representative shall inspect the grade through the use of string line, straightedge, levels, or any other means necessary

Existing paved surfaces shall be cleaned of loose material by sweeping with a power broom, supplemented by hand sweeping, if determined necessary by the Engineer.

The excavated area shall be backfilled, as directed by the Engineer, with crushed aggregate Leveling Course material and/or Asphalt Concrete leveling course in Pavement surface irregularities, remaining from the rotomilling effort, that extend more than three quarters inch (3/4") below the milling indentations shall be pre-leveled and brought into conformance with the tolerances established in

Preparation of Paving Asphalt, The asphalt shall be heated at the paving plant to a temperature at which it can be properly handled through the pumping system, but at no time shall the temperature of the asphalts exceed that recommended by the asphalt supplier or manufacturer, or be greater than three hundred twenty-five degrees (325°) Fahrenheit or less than two hundred fifty degrees (250°) Fahrenheit.

2.3 MAINTENANCE

A. Typical maintenance will follow manufactures specifications.

2.4 WARRANTY

A. Asphalt covering shall be installed with a 1 year labor warranty,

2.5 OWNERSHIP RESPONSIBILITY:

A. Provide project oversight by appointed COTR.

2.6 CONTRACTOR CLEARANCE

A. All contractor must be able to complete and clear a NCIC background investigation prior to the beginning of construction.