Attachment 0001_ Statement of Work 31 March 2022.pdf

Statement of Work for Paving Materials

GPLS 20-2020

PART I – General Contract Requirements

1. General Requirements.

1.1. Hot-mix asphalt shall be delivered by trucks from the batch plant to the job site. Once on site, the contractor shall load the materials into the hopper of the Government operated asphalt paving machine under the direction of the Government workers on the job site. The asphalt shall conform to the specifications provided in Part II-Hot-Mix Asphalt Specifications.

1.2. The Contractor shall deliver and apply tack and prime coat at the direction of the Government.

The tack and prime coat shall conform to the specifications provided in Part III.

1.3. Base course shall be delivered by trucks from the batch plant to the job site. All base course shall be placed at the direction of the Contracting Officer’s Representative (COR);

the Contractor is providing the material for work to be completed by the Government. The base course shall conform to the specifications in Part IV.

1.4. The Contractor shall batch and deliver concrete to the job site. All concrete shall be placed at the direction of the Contracting Officer’s Representative (COR); the Contractor is providing the material for work to be completed by the Government. The concrete shall conform to the specifications in Part V.

1.5. Engineered Fill shall be delivered by trucks from the batch plant to the job site. All

Engineered Fill shall be placed at the direction of the Contracting Officer’s Representative

(COR); the Contractor is providing the material for work to be completed by the

Government. The fill material shall conform to the specifications in Part VI.

1.6. All material is to be delivered to the 820th RED HORSE Squadron (820 RHS) operating at Royal Air Force Feltwell (RAFF), Norfolk, England.

1.7. The contractor shall provide all labor, materials, tools, equipment, transportation, expertise, supervision, communication, and all other items and services as necessary to complete the work described in this Statement of Work. The contractor shall perform to the standards in the contract.

The Contractor shall execute all work in a timely, safe and professional manner, in accordance with the applicable specifications, plans, drawings, and industry standard construction practices and techniques.

1.8. All increases, decreases, or modifications to the requirements specified in this Statement of

Work must be directed by the Contracting Officer (CO).

1.9. All deliveries under this agreement shall be accompanied by an original delivery ticket.

Contractor shall provide a copy of said ticket or rental slip to the contracting officer’s designated representative on site at the time of delivery. It shall contain the following:

1.9.1. Name and location of Plant

1.9.2. Contract Number

1.9.3. Date of Order

1.9.4. Quantity, unit price and less applicable discounts

1.9.5. Date of Delivery

1.9.6. Material data (ensuring conformance with the specifications below)

1.10. Equipment: All trucks and trailers shall be covered (tarped) when loaded with aggregate base course or engineered fill material. All equipment used in the work shall be of the proper type, of a sufficient size and in good operating condition to safely deliver the aforementioned quantity in several deliveries. The Contracting Officer may order removal and/or replacement of any unsatisfactory equipment at the Contractor's expense. All equipment must meet all

Federal and State licensing and safety requirements.

1.11. Safety: The Contractor shall exercise due caution and care when working to prevent undue conflict with public users of roads. Roads shall remain passable to traffic during the Contractor's operations. The Contracting Officer has authority to have deliveries stopped when weather or road conditions are unsuitable for the hauling of aggregate. If operations are stopped for any reason, the

Contractor will be notified by the CO twenty- four (24) hours prior to resuming operations.

2. The Contractor shall be responsible for providing material and all necessary supporting equipment to deliver the material to RAFF according to the criteria provided in the included specifications (Parts II

- VI) through one of the entry control point’s for task orders against this contract will not be authorized unless specifically approved by the CO.

3. Delivery Periods. The Contractor shall be available for delivery of materials during standard working hours, 0500-1900, Monday through Saturday between the dates of 15 May 2022 through 30 August

2022. The Government will provide notice to the Contractor for a material call no later than 48 hours prior to the anticipated delivery; the Government reserves the delivery with 48 hours advance notice. The Contractor shall be responsible for delivery with 48 hours advance notice. The

Contractor shall be responsible for transporting construction materials to the construction site. The

Government will make every effort to provide the Contractor the maximum amount of notice possible. The Government reserves the right to reschedule a delivery due to adverse circumstance including weather conditions and site mishaps with 12 hours’ notice.

4. The contractor shall be capable of delivering as much as 550 Tons of asphalt a day and a little as 275

Tons of asphalt a day with all deliveries arriving within as short as 15 minute intervals of one another. Daily delivery amounts and intervals will be coordinated by the COR.

5. The contractor shall be capable of delivering as much as 236 cubic meters of concrete a day and as little as 56 cubic meters of concrete in a day with all deliveries arriving within as short as 15 minute intervals of one another. Daily delivery amounts and intervals will be coordinated by the COR.

6. Military Installation Requirements.

6.1. The Contractor is responsible for the collection and off-base disposal of all debris, rubble, residue, and non-salvageable, unusable, and waste material generated in the performance of work under this contract. All such materials shall be disposed of at an off-base landfill by the

Contractor or at an on-base location specified by the CO, if approved. The Contractor is not permitted to deposit any such materials in the installations trash collection containers or at any other location on the installation without prior approval by the CO. Disposal of materials shall be in accordance with all applicable host nation and international laws. The Contractor shall keep the site clean and free of trash and debris at all times. Loose materials must be secured at all times. Daily and final site cleanup is the Contractor’s responsibility.

6.2. Hazardous Materials. Materials classified as hazardous by rules, regulations, laws, and/or the

Overseas Environmental Baseline Guidance Document (OEBGD) shall be handled and processed for disposal in accordance with those rules, regulations, laws, and/or OEBGD. The

Contractor is responsible for all such materials that are residual from Contractor-furnished supplies and materials which were brought to the job site by the Contractor as well as any such materials identified in this document or the drawings.

6.3. In the event the Contractor brings any hazardous material on to RAFF, the Contractor shall notify

48 CES/CEI of the approximate quantities of the material to be used on the project and will supply a Material Safety Data Sheet (MSDS) of those materials in English.

6.4. The Contractor shall be responsible for the covering of open bodied vehicles transporting any material likely to create air pollution or become debris while on base.

6.5. All mud, dirt, debris, foreign objects, trash, or spills (including Sub-Contractors and suppliers) on a street or parking lot, used as access to the work site or staging area shall be cleaned off the same day or as soon as practicable or requested by the CO.

6.6. The Contractor shall immediately report to the CO to discuss any issues or incidents which may indicate potential imminent risk to Government personnel or the environment. Following the notification, the Contractor shall be available to the CO for instructions regarding remediation of the release. Contractor should be aware of “you spill, you dig” policies related to working on

RAFF and be prepared to respond to a release caused by the Contractor’s personnel. To report a release or spill, contact the Government escort immediately.

6.7. Any tanks or drum containers used by the Contractor on RAFF to store hazardous materials including petroleum products will be stored within secondary containment structures capable of holding a volume of 110% of the largest container.

7. Workplace Safety. The Contractor is responsible for the safety of his workers and the safety of all personnel at RAFF. The Contractor shall ensure that vehicles are operated safely and professionally at all time. Spotters are required when backing up vehicles. The Government reserves the right to halt work if unsafe workplace practices are discovered. Work shall remain halted until the safety issue is resolved to the Government’s satisfaction. Smoking is prohibited inside buildings and within 15 meters (50 feet) of flammable and combustible liquids. Smoking is permitted only in designated areas.

7.1. If any item is discovered that may be unexploded ordinance, immediately alert the Government escort. The Government escort will contact appropriate agencies.

8. Contractor Furnished Items and Services. The Contractor shall furnish everything needed to perform all work under this statement of work, unless otherwise specified. All materials provided by the

Contractor shall be new and match or exceed industry standard for projects of similar size and complexity. The Contractor’s equipment shall be in good repair and operate safely and efficiently.

The Government reserves the right to inspect the Contractor’s equipment and/or tools. At no additional cost to the Government, the Contractor shall remove unsafe items from the job site. The

Contractor shall provide any and all individual safety equipment necessary to comply with all local

Government safety requirements.

9. Prohibited Material. The Contractor shall certify that products do not contain mercury, lead, hexavalent chromium, toluene, chlorinated solvents, hydrolyzable chlorine derivatives, nor any ethylene based glycol ethers and their acetates. When tested, the lead content shall not exceed 0.06% by weight of the dry film and the test for chromium content shall be negative.

10. Convenience Facilities. The Contractor shall provide accommodations for restroom facilities for use by the Contractor’s personnel unless directed otherwise by the CO.

11. Security Requirements.

11.1. Contractor Access to Installations: Access to DoD installations is limited to personnel with a valid installation access pass. Failure to submit required information to obtain required documentation will result in the exclusion of such employees from the installation until such documentation is obtained. Contractor employees may be subject to personal and vehicle searched when entering or leaving a DoD installation. If installation access is required, the Government will provide the Contractor with the required information and documents for installation access passes upon award. Subsequently, the Contractor shall provide a list of all employees along working under this contract, along with the required documentation upon receipt of contract award, and no later than 30 days prior to the projected need for any new installation access pass requirements.

The Contractor is responsible for maintaining an adequate number of personnel with active installation access passes, and adhering to the timeframes stated in this section. The cognizant mission partner is responsible for the coordination of installation access passes. Upon termination of employment, termination or cancellation of the contract, or expiration of the contract the

Contractor is responsible for collecting employee installation access passes and turning them in to the CO, or the cognizant mission partner in a timely fashion.

11.2. Operational Security (OPSEC): The Contractor shall be familiar with the organizational critical information and indicators list (CIIL) and OPSEC policy of any installation they require access to.

The required CIIL can be provided by the Contracting Officer.

11.3. Safety: The Contractor shall promptly report pertinent facts regarding mishaps involving

Government property damage or injury to Government/Contractor personnel that takes place on an installation. The Contractor shall notify the cognizant Contracting Officer within 24 hours of all mishaps or incidents. The Contracting Officer will in-turn notify the Safety Office. The Contractor shall cooperate in any resulting safety investigation.

12. Emergency Situations. Access may be restricted at any time. Restricted access is reserved for emergency actions, exercises, or increased installation security.

13. Contractor Responsibility.

13.1. The Contractor shall provide a contact phone number for a manager that can make decisions for the Contractor and who is responsible for the performance of the work. The manager shall be designated in writing when the contract is awarded, and must always be available during work hours. The manager shall read, write, and speak fluent English. Additionally, the on-site manager shall have sufficient technical knowledge with regard to the requirements prescribed in this

Statement of Work. The COR shall have the right to request for a replacement of any individual deemed acceptable to the Government at any time.

13.2. All materials and articles requiring approval shall be submitted by the Contractor using the AF

Form 3000. Any material used without or before Government approval is subject to removal, at no additional cost to the Government. The Contractor shall submit material samples, design drawings, and related calculations to the CO for approval a minimum of five (5) calendar days prior to procurement and placement of that particular material and construction respectively.

This is to preclude approval of a completed design package preceding any construction placement thereby completing delivery orders expeditiously. Upon review by the Government, the submittal along with any comments will be returned to the Contractor within five (5) calendar days. If required, the Contractor shall modify the submittal per Government’s comments and resubmit within five (5) calendar days. Upon final approval, the Contractor shall commence with the delivery and/or service accordingly.

14. A Responsive Bidder shall include the following items current within the last six months with their bid:

14.1. Completed Bid Sheet.

14.2. All Plant Location and Capacities.

14.3. Estimated Haul/Delivery Times.

14.4. Times of Material Delivery Availability (i.e., on what days/times can deliveries be made).

14.5. Asphalt JMF and Applicable Test Results as Referenced in Part II.

14.6. Proposed Tack and Prime Coat Material and Applicable Test Results.

14.7. Available base coarse data ensuring conformance with the specifications referenced in Part IV and

Part VI.

14.8. Results of the Proposed Concrete Mix Design and Applicable Test Results referenced in Part V.

END OF SECTION

Statement of Work for Paving

Materials

PART II – Hot-Mix Asphalt Specifications

1. The Contractor shall provide hot-mix asphalt that conforms to the specifications in this section.

2. Payment:

2.1. All asphalt material will be paid for on the basis of unit price; this unit price shall include the cost of the material and for delivery to the job site. The amount paid for will be the number of metric tons of hot-mix asphalt mixture used in the accepted work. Weigh hot-mix asphalt mixture after mixing, and no separate payment will be made for weight of asphalt cement material incorporated herein. The Contractor shall provide the COR weight receipts for all trucks to validate the quantities of materials delivered to the job site.

2.2. Asphalt material not meeting the specifications of this Statement of Work shall be removed and replaced at the Contractor’s expense, or at the sole discretion of the Government, the material can be accepted at a reduced unit price using standard pay modification factors.

3. Aggregates.

Aggregates shall consist of crushed stone, crushed gravel, crushed slag, screenings, natural sand, and mineral filler, as required. The portion of material retained on the 4.75 mm (No. 4) sieve is coarse aggregate.

The portion of material passing the 4.75 mm (No. 4) sieve and retained on the 0.075 mm (No. 200) sieve is fine aggregate. The portion passing the 0.075 mm (No. 200) sieve is defined as mineral filler. Submit sufficient materials to produce 90 kg (200 lbs) of blended mixture for mix design verification. All aggregate test results and samples shall be submitted to the CO at least 7 days prior to start of construction; deviations from this schedule shall be coordinated with the CO. Aggregate testing shall be performed by a 3rd party company for the cured asphalt, and asphalt components (aggregate, sand, binder, etc.) and must have been performed within 90 days of performing the mix design.

3.1. Coarse Aggregates.

3.1.1. Coarse aggregate shall consist of sound, tough, durable particles, free from films of material that would prevent thorough coating and bonding with the asphalt material and free from organic matter and other deleterious substances. The coarse aggregate particles shall meet the following requirements:

3.1.2. The percentage of loss shall not be greater than 40 percent after 500 revolutions when tested in accordance with ASTM C 131 or equivalent British standard approved by the CO.

3.1.3. The sodium sulfate soundness loss shall not exceed 12 percent, or the magnesium sulfate soundness loss shall not exceed 18 percent after five cycles when tested in accordance with ASTM C 88 or equivalent British standard approved by the CO.

3.2.4. At least 75 percent by weight of coarse aggregate shall have at least two or more fractured faces when tested in accordance with U.S. Army Corps of Engineers

CRD-C 171. Fractured faces shall be produced by crushing.

3.2.5. The particle shape shall be essentially cubical, and the aggregate shall not contain more than 20 percent, by weight, of flat and elongated particles (3:1 ratio of maximum to minimum) when tested in accordance with ASTM D 4791 or equivalent British standard approved by the CO.

3.2.6. Slag shall be air-cooled, blast furnace slag, and shall have a compacted weight of not less than 1,200 kg/cubic meter (75 lb/cu ft) when tested in accordance with

ASTM C29/C29M or equivalent British standard approved by the CO.

3.2.7. Clay lumps and friable particles shall not exceed 0.3 percent, by weight, when tested in accordance with ASTM C 142/C 142M or equivalent British standard approved by the CO.

3.3. Fine Aggregates.

3.3.1. Fine aggregate shall consist of clean, sound, tough, durable particles. The aggregate particles shall be free from coatings of clay, silt, or any objectionable material and shall contain no clay balls. The fine aggregate particles shall meet the following requirements:

3.3.2. The quantity of natural sand (non-crushed material) added to the aggregate blend shall not exceed 15 percent by weight of total aggregate.

3.3.3. The individual fine aggregate sources shall have a sand equivalent value greater than 45 when tested in accordance with ASTM D 2419 or equivalent British

3.3.4. The fine aggregate portion of the blended aggregate shall have an uncompacted void content greater than 45.0 percent when tested in accordance with ASTM C

1252 Method A or equivalent British standard approved by the CO.

3.3.5. Clay lumps and friable particles shall not exceed 0.3 percent, by weight, when tested in accordance with ASTM C 142/C 142M or equivalent British

3.4. Mineral filler shall be non-plastic material meeting the requirements of ASTM D 242/D 242M or

3.5. Gradation.

3.5.1. The combined aggregate gradation shall conform to the gradation specified in the table below, when tested in accordance with ASTM C 136 and ASTM C 117 or equivalent

British standard approved by the CO, and shall not vary from the low limit on one sieve to the high limit on the adjacent sieve or vice versa, but grade uniformly from coarse to fine. The JMF shall be within the specification limits.

Gradations

Percent Passing by Mass (%)

Sieve Size (mm

/ Sieve #) Surface Course Intermediate Course

25.0 / 1” 100 100

19 / 3/4” 100 76-96

12.5 / 1/2” 76-96 68-88

9.5 / 3/8” 69-89 60-82

4.75 / No. 4 53-73 45-67

2.36 / No. 8 38-60 32-54

1.18 / No. 16 26-48 22-44

0.60 / No. 30 18-38 15-35

0.30 / No. 50 11-27 9-25

0.15 / No. 100 6-18 6-18

0.075 / No. 200 3-6 3-6

4. Asphalt Binder.

4.1. Asphalt cement binder shall conform to AASHTO M 320 Performance Grade (PG) 70-22 or an approved alternate by the CO. Test data indicating grade certification shall be provided by the supplier at the time of delivery of each load to the mix plant. Copies of these certifications shall be submitted to the CO. The supplier is defined as the last source of any modification to the binder. The CO or COR may sample and test the binder at the mix plant at any time before or during mix production. Samples for this verification testing shall be obtained in accordance with ASTM D140/D140M or equivalent British standard approved by the CO and in the presence of the CO or COR. These samples shall be furnished to the CO or COR for the verification testing, which shall be at no cost to the Contractor.

5. Mix Design.

5.1. The Contractor shall develop or submit a previously designed mix design that meets the specifications put forth in this statement of work with quote submittal. The Job Mix Formula

(JMF) shall have been developed and aggregates tested no earlier than three months before contract award. The asphalt mix shall be composed of a mixture of well-graded aggregate, with mineral filler if required, and asphalt binder. The aggregate fractions shall be sized, handled in separate size groups, and combined in such proportions that the resulting mixture meets the grading requirements of this contract. The hot-mix asphalt shall meet the criteria of the Marshall Mix Design method. A well-blended, representative sample of the JMF, weighing no less than 34 kg (75 lbs), shall be provided to the COR for verification of mix design at least 7 days prior to initial delivery; deviations from this requirement shall be coordinated with the CO. If the Tensile Strength ratio (TSR) of the mix, as determined by

ASTM D 4867/D 4867M or equivalent British standard approved by the CO is less than 75, the aggregates shall be rejected or the asphalt mixture treated with an anti-stripping agent. The amount of anti- stripping agent added shall be sufficient to produce a TSR of not less than 75;

the anti-stripping agent shall be provided at no additional cost to the Government.

5.2. The Contractor shall utilize the Marshall Design method, warm-mix asphalt, or polymer modified binders, but should submit a request for information to the CO requesting the specifications to be utilized.

Marshall Mix Design Criteria

Test Property 75 Blow Mix Stability (N / pounds minimum) 9560 / 2150(1)

Flow (0.25 mm / 0.01 inch) 8-16(2)

Percent Air voids 4% Dust Proportion(3)

0.8-1.2

TSR, Minimum Percent 75%

TSR Conditioned Strength (minimum kPa/psi) 415 / 60

Percent Voids in Mineral Aggregate (minimum) Intermediate Courses 13%

Surface Course 14%

Notes:

1. This is a minimum requirement. The average during construction shall be significantly higher than this number to ensure compliance with the specifications.

2. The flow requirement is not applicable for Polymer Modified Asphalts.

3. Dust Proportion is calculated as the aggregate content, expressed as a percent of mass, passing the 0.075 mm (No. 200 sieve), divided by the effective asphalt content, in percent of total mass

4. Calculate VMA in accordance with AI MS-2, based on ASTM D2726/D2726M or equivalent British standard approved by the CO bulk specific gravity for the aggregate.

5.3. The Contractor shall submit four copies of the proposed JMF test results for approval in writing, for approval, at least 14 days prior to the start of the Government identified test section. The test results should at a minimum include:

5.3.1. Percent passing each sieve size.

5.3.2. Percent of asphalt cement.

5.3.3. Percent of each aggregate and mineral filler to be used.

5.3.4. Asphalt viscosity grade, penetration grade, or performance grade.

5.3.5. Number of blows of hammer per side of molded specimen.

5.3.6. Laboratory mixing temperature.

5.3.7. Lab compaction temperature.

5.3.8. Temperature-viscosity relationship of the asphalt cement.

5.3.9. Plot of the combined gradation on the 0.45 power gradation chart, stating the nominal maximum size and theoretical maximum aggregate size.

5.3.10. Graphical plots and summary tabulation of stability, flow, air voids, voids in the mineral aggregate, and unit weight versus asphalt content as shown in AI MS-02. Summary tabulation shall include individual specimen data for each specimen tested.

5.3.11. Specific gravity and absorption of each aggregate.

5.3.12. Percent natural sand.

5.3.13. Coarse Aggregate Angularity

5.3.14. Sand Equivalence Test

5.3.15. Fine aggregate angularity.

5.3.16. Percent flat or elongated particles (in coarse aggregate).

5.3.17. Tensile Strength Ratio and wet/dry specimen test results.

5.3.18. Anti-strip agent (if required).

5.3.19. List of all modifiers.

5.4. Adjustments to the JMF.

5.4.1. The JMF for each mixture shall be in effect until a new formula is approved in writing by the CO. Should a change in sources of any materials be made, a new mix design shall be performed and a new JMF approved before the new material is used. The

Contractor will be allowed to make minor adjustments within the specification limits to the JMF to optimize mix volumetric properties. Adjustments to the original JMF shall be limited to plus or minus 4 percent on the 4.75 mm (No. 4) and coarser sieves;

plus or minus 3 percent on the 2.36 mm (No. 8) to 0.30 mm (No. 50) sieves; and plus or minus 1 percent on the 0.15 mm (No. 100) sieve. Adjustments to the JMF shall be limited to plus or minus 1.0 percent on the 0.075 mm (No. 200) sieve. Asphalt content adjustments shall be limited to plus or minus 0.40 percent from the original JMF. If adjustments are needed that exceed these limits, a new mix design shall be developed.

6. Execution

6.1. The asphalt binder material shall be heated avoiding local overheating and providing a continuous supply of the asphalt material to the mixer at a uniform temperature. The temperature of unmodified asphalts shall not exceed 160 degrees C (330 degrees F) when added to the aggregates. Performance Graded (PG) asphalts shall be within the temperature range of 141 degrees C (285 degrees F) to 166 degrees C (330 degrees F) when added to the aggregates.

6.2. Preparation of Mineral Aggregate.

6.2.1. The aggregate for the mixture shall be heated and dried prior to mixing. No damage shall occur to the aggregates due to the maximum temperature and rate of heating used. The temperature of the aggregate and mineral filler shall not exceed 175 degrees

C (350 degrees F) when the asphalt cement is added. The temperature shall not be lower than is required to obtain complete coating and uniform distribution on the aggregate particles and to provide a mixture of satisfactory workability.

6.3. Preparation of Hot-Mix Asphalt Mixture.

6.3.1. The aggregates and the asphalt cement shall be weighed or metered and introduced into the mixer in the amount specified by the JMF. The combined materials shall be mixed until the aggregate obtains a thorough and uniform coating of asphalt binder

(testing in accordance with ASTM D2489/D2489M or equivalent British standard approved by the CO may be required by the CO) and is thoroughly distributed throughout the mixture. The moisture content of all hot-mix asphalt upon discharge from the plant shall not exceed 0.5 percent by total weight of mixture as measured by ASTM D1461 or equivalent British standard approved by the CO.

6.4. Transporting. The hot-mix asphalt shall be transported from the mixing plant to the site in clean, tight vehicles. Hauling over freshly placed material will not be permitted until the material has been compacted as specified, and allowed to cool to 60 degrees C (140 degrees F).

6.4.1. Delivery Quantities. The Contractor shall be capable of to delivering a minimum of 32

MT of asphalt in a day and truck sizes will not exceed 32 MT due to Government paver capabilities unless a deviation is approved by CO.

6.4.2. Delivery Temperature. Temperature upon arrival at the job site shall be between 141 and

146 degrees C (285 and 295 degrees F). The COR shall be present to record each truck’s temperature upon arrival. If the material fails to meet these temperature requirements, the entire truck will be rejected, the material removed, and replaced at no additional cost to the Government.

6.4.3. Trucks used for hauling hot-mix asphalt shall have tight, clean, and smooth metal beds.

To prevent the mixture from adhering to them, the truck beds shall be lightly coated with a minimum amount of paraffin oil, lime solution, or other approved material. Petroleum based products shall not be used as a release agent. Each truck shall have a suitable cover to protect the mixture from adverse weather. When necessary to ensure that the mixture will be delivered to the site at the specified temperature, truck beds shall be insulated or heated and covers (tarps) shall be securely fastened.

6.4.4. A delivery (scale) ticket shall be prepared for each load of hot-mixed bituminous pavement, at no additional cost to the U.S. Government and given to the CO’s representative during asphalt operations. A copy of each ticket shall be retained by the CO. Delivery tickets shall indicate the following:

6.4.4.1. Supplier’s name and date

6.4.4.2. Truck number

6.4.4.3. Project number and identification

6.4.4.4. Gross weight of truck and asphalt

6.4.4.5. Tare weight of truck

6.4.4.6. Net weight of asphalt

6.4.4.7. Daily cumulative weight of asphalt

6.4.4.8. Mix design identification

6.4.4.9. Provide the following blank space to record information:

6.4.4.9.1. Project station

6.4.4.9.2. Temperature of mix at the laydown machine

6.4.4.9.3. Time of lay down

6.4.4.9.4. Note if sample was taken

6.4.4.10. The time and date the load was placed on the vehicle

6.5. Delivery Scheduling.

6.5.1. Deliveries shall be scheduled in coordination with the COR so that placing and compacting of mixture is uniform with minimum stopping and starting of the paver.

6.6. Segregation.

6.6.1. The CO or COR can sample and test any material that looks deficient. When the material appears to be segregated, the CO or the COR has the option to sample the material and have it tested and compared to the aggregate gradation, asphalt content requirements in this contract. If the material fails to meet these specification requirements, the extent of the segregated material will be removed and replaced at no additional cost to the

Government.

7. Asphalt Mixing Plant

7.1. Plants used for the preparation of hot-mix asphalt shall conform to the requirements of AASHTO

M 156 or equivalent British standard approved by the CO with the following changes:

7.1.1. Truck Scales. Weigh the asphalt mixture on approved scales furnished by the Contractor, or on certified public scales at the Contractor’s expense. Scales shall be inspected and sealed at least annually by an approved calibration laboratory. Proof of inspection shall be provided to the CO.

7.1.2. Testing Facilities. Provide laboratory facilities at the plant for the use of the Contractor’s quality control testing.

7.1.3. Inspection of Plant. The COR shall have access at all times to all areas of the plant to check the adequacy of equipment, inspect operations of the plant, verify weights, verify proportions, verify material properties, check the temperatures maintained in the preparation of the mixtures, and to take samples. The Contractor shall provide assistance as requested by the COR to procure any desired samples.

7.1.4. Storage Bins. The asphalt mixture may be stored in non-insulated storage bins for a period of time not exceeding three hours. The asphalt mixture may be stored in insulated storage bins for a period of time not exceeding eight hours. The mix drawn from bins shall meet the same requirements as mix loaded directly into trucks.

8. Quality Control. The Contractor shall implement a quality control plan (QCP) to ensure that its materials meet the specifications provided in this contract. The COR will be provided with a copy of all products related to the QCP.

8.1. The Contractor shall submit the following information as part of its QCP deliverables: mix design, aggregate gradation, results of the material quality tests as specified in Part II of this

SOW, moisture content, mixture volumetric information, and information on the release agent used by the Contractor.

9. Quality Assurance: The Government’s quality assurance (QA) program for this project is separate and distinct from the Contractor’s quality control (QC) program. Acceptance of the plant produced mix requirements will be on a truck by truck basis.

9.1. One random mixture sample for determining laboratory air voids, and theoretical maximum density, will be taken from a loaded truck delivering mixture to each sublot, or other appropriate location for each sublot. Sublots are equal to a quarter of a lot. A standard lot for all requirements will be equal to 2,000 MT. All samples will be selected randomly, using commonly recognized methods of assuring randomness conforming to ASTM D3665 or equivalent British standard approved by the CO and employing tables of random numbers or computer programs. Laboratory air voids will be determined from three laboratory compacted specimens of each sublot sample in accordance with ASTM D6926 or equivalent British standard approved by the CO. The specimens will be compacted within two hours of the time the mixture was loaded into trucks at the asphalt plant. Samples will not be reheated prior to compaction and insulated containers will be used as necessary to maintain the temperature.

Results will be submitted to the CO.

9.2. The CO reserves the right to direct additional samples and tests for any area which appears to deviate from the specification requirements. The cost of any additional testing will be paid for by the Government/Owner. Testing in these areas will be treated as a separate lot. Payment will be made for the quantity of HMA represented by these tests in accordance with the provisions of this section.

9.3. Perform all quality control tests applicable to these specifications and as set forth in the Quality

Control Program. The testing program shall include, but shall not be limited to, tests for the control of asphalt content, aggregate gradation, temperatures, aggregate moisture, moisture in the asphalt mixture, laboratory air voids, stability, and flow.

9.4. Temperatures shall be checked at least four times per lot, at necessary locations, to determine the temperature at the dryer, the asphalt cement in the storage tank, the asphalt mixture at the plant, and the asphalt mixture at the job site.

9.5. The moisture content of the mixture shall be determined at least once per lot in accordance with

AASHTO T 329 or equivalent British standard approved by the CO.

9.6. Any additional testing, which the Contractor deems necessary to control the process, may be performed at the Contractor’s option.

9.7. Submit all QC test results to the CO on a daily basis as the tests are performed. The CO reserves the right to monitor any of the Contractor’s quality control testing and to perform duplicate testing as a check to the Contractor’s quality control testing.

9.8. When directed by the CO or COR, sample and test any material which appears inconsistent with similar material being produced, unless such material is voluntarily removed and replaced or deficiencies corrected by the Contractor. All sampling shall be in accordance with standard procedures specified.

Statement of

Work for Paving

PART III – Prime and Tack Coat Specifications

1. The Contractor shall provide and spray prime and tack coat material to the job site. The material shall be applied by the Contractor at a location determined by the COR.

2. Payment:

2.1 The bituminous material paid for will be the measured quantities used in the accepted work, including gallons of tack oil used and hours of application time, provided that the measured quantities are not 10 percent over the specified application rate. Any amount of bituminous material more than 10 percent over the specified application rate for each application shall be deducted from the measured quantities, except for irregular areas where hand spraying of the bituminous material is necessary. Measurements at temperatures other than 15.6 degrees C (60 degrees F) shall be corrected in accordance with ASTM D 1250 or equivalent British standard approved by the CO. The Contractor shall provide documentation to the COR to validate the quantities of materials delivered to the job site. Material not meeting the specifications of this

Statement of Work shall be removed and replaced at the Contractor’s expense, or at the sole discretion of the Government, the material can be accepted at a reduced unit price using standard pay modification factors.

3. Materials.

3.1 The Contractor shall select a prime coat and tack coat material in compliance with the specifications in this section to use. All materials shall be submitted for approval to the CO prior to use. Emulsified asphalts of grades SS-1 or SS-1h are the preferred material; however, the Government will allow the usage of acceptable alternates as approved by the CO.

3.2 Cutback asphalt shall conform to American Society for Testing and Materials (ASTM) D 2028, Standard Specification for Cutback Asphalt (Rapid-Curing Type), cutback grades RC-70 or RC-

250 or equivalent British standard approved by the CO. These materials perform better than emulsions in cool weather construction.

3.3 Paving grade asphalt shall conform to the table below.

ASTM Standard Grade

ASTM D 946, Standard Specification for

Penetration-Graded Asphalt Cement for Use in Pavement Construction or equivalent

British standard approved by the CO

Penetration grade 200-300, 120-150, or

85-100

ASTM D 3381, Standard Specification for

Viscosity-Graded Asphalt Cement for Use in

Pavement Construction or equivalent British standard approved by the CO

Viscosity grade AC 2.5, AC 5, or AC 10

ASTM D 3381 or equivalent British standard approved by the CO

Aged residue viscosity grades AR 1000, AR 2000, or AR 4000

3.4. Emulsions, either anionic or cationic, can be used for tack coats. Anionic emulsion shall conform to ASTM D 977, Standard Specification for Emulsified Asphalt, grades RS-1, MS-1, HFMS-1, SS-1 or SS-1h. Cationic emulsions shall conform to ASTM D 2397, Standard

Specification for Cationic Emulsified Asphalt, grades CRS-1, CSS-1, and CSS-1h or equivalent British standard approved by the CO. Grades SS-1 and CSS-1h are made with harder base asphalt and are recommended for airfield pavements. Grades RS-1, SS-1, and SS-

1h are widely used as tack coat materials.

3.5 Emulsified asphalt should be diluted with no more than an equal volume of water. The base asphalt used to manufacture the emulsion shall show a negative spot when tested in accordance with AASHTO T 102 using standard naphtha or equivalent British standard approved by the

CO.

3.6 The equipment for heating the bituminous material shall be steam, electric, or hot oil heaters.

Steam heaters shall consist of steam coils and equipment for producing steam, so designed that the steam cannot get into the material. Fix an armored thermometer to the tank with a temperature range from 4.4 to 204.4 degrees C (40 to 400 degrees F) so that the temperature of the bituminous material may be determined at all times.

4. Execution.

4.1 Application of Tack Coat.

4.1.1 The application rates specified in this paragraph are the rates for the asphalt residue content and do not account for the water or solvent if an emulsion or cutback is used. Tack coats shall be applied at the rate of 0.3 to 0.7 liter per square meter (0.05 to 0.15 gallons per square yard). If, at the prescribed application rate, the material flows off the surface, the application rate shall be adjusted at the direction of the COR.

4.1.2 A calibrated bituminous distributor capable of the required application rates will apply prime and tack coats. The equipment will include a self-powered pressure bituminous material distributor and equipment for heating bituminous material. The distributor will be designed, equipped, maintained, and operated so that bituminous material at even heat may be applied uniformly on variable widths of surface at the specified rate. The allowable variation from the specified rate will not exceed 10 percent. Distributor equipment will include a tachometer, pressure gauges, volume-measuring devices or a calibrated tank, and a thermometer for measuring temperatures of tank contents. The distributor will be self-powered and will be equipped with a power unit for the pump and full circulation spray bars adjustable laterally and vertically.

4.1.3 The application temperature will provide an application viscosity between 10 and

60 seconds, Saybolt Furol, or between 20 and 120 square millimeters per second

(20 and 120 centistokes), kinematic. The table below shows the normal application temperatures for each material type

Asphalt Type Grade Application Temperature

Liquid Asphalts

SC-70 50-107 °C (120-225 °F)

SC-250 75-132 °C (165-270 °F)

MC-30 29-87 °C (85-190 °F)

MC-70 50-107 °C (120-225 °F)

MC-250 75-132 °C (165-270 °F)

RC-70 50-90 °C (120-200 °F)

RC-250 75-120 °C (165-250 °F)

Viscosity and Aged

Residue Grade Asphalts

AC 2.5 +132 °C (+270 °F)

AC 5 +137 °C (+280 °F)

AC 10 +137 °C (+280 °F)

AR 1000 +135 °C (+275 °F)

AR 2000 +140 °C (+285 °F)

AR 4000 +143 °C (+290 °F)

Penetration Grade

Asphalt

200-300 +130 °C (+265 °F)

120-150 +132 °C (+270 °F)

85-100 +137 °C (+280 °F)

Emulsions

RS-1 20-60 °C (70-140 °F)

MS-1 20-70 °C (70-160 °F)

HFMS-1 20-70 °C (70-160 °F)

SS-1 20-70 °C (70-160 °F)

SS-1h 20-70 °C (70-160 °F)

CRS-1 52-85 °C (125-185 °F)

CSS-1 20-70 °C (70-160 °F)

CSS-1h 20-70 °C (70-160 °F)

4.1.4. Asphalt material shall be applied at the specified rate with uniform distribution over the surface to be treated. All areas and spots missed by the distributor will be properly treated by hand spray. If required, clean, dry sand will be used to soak up excess bituminous material.

4.2 Application of Prime Coat

4.2.1 The application rates specified in this paragraph are the rates for the asphalt residue content and do not account for the water or solvent if an emulsion or cutback is used. Tack coats shall be applied at the rate of 0.8 to 1.6 liter per square meter (0.18 to 0.35 gallons per square yard). If, at the prescribed application rate, the material flows off the surface, the application rate shall be adjusted at the direction of the COR.

4.2.2 A calibrated bituminous distributor capable of the required application rates will apply prime and tack coats. The equipment will include a self-powered pressure bituminous material distributor and equipment for heating bituminous material. The distributor will be designed, equipped, maintained, and operated so that bituminous material at even heat may be applied uniformly on variable widths of surface at the specified rate. The allowable variation from the specified rate will not exceed 10 percent. Distributor equipment will include a tachometer, pressure gauges, volume-measuring devices or a calibrated tank, and a thermometer for measuring temperatures of tank contents. The distributor will be self-powered and will be equipped with a power unit for the pump and full circulation spray bars adjustable laterally and vertically.

4.2.3. The application temperature will provide an application viscosity between 10 and 60 seconds, Saybolt Furol, or between 20 and 120 square millimeters per second (20 and 120 centistokes), kinematic. The table below shows the normal application temperatures for each material type.

Asphalt Type Grade Application Temperature

Liquid Asphalt

SC-70 50-107 °C (120-225 °F)

SC-250 75-132 °C (165-270 °F)

MC-30 29-87 °C (85-190 °F)

MC-70 50-107 °C (120-225 °F)

MC-250 75-132 °C (165-270 °F)

RC-70 50-90 °C (120-200 °F)

RC-250 75-120 °C (165-250 °F)

Viscosity Grade Asphalt

AC 2.5 +132 °C (+270 °F)

AC 5 +137 °C (+280 °F)

AC 10 +137 °C (+280 °F)

AR 1000 +135 °C (+275 °F)

AR 2000 +140 °C (+285 °F)

AR 4000 +143 °C (+290 °F)

Penetration Grade

Asphalt

200-300 +130 °C (+265 °F)

120-150 +132 °C (+270 °F)

85-100 +137 °C (+280 °F)

Emulsions

RS-1 20-60 °C (70-140 °F)

MS-1 20-70 °C (70-160 °F)

HFMS-1 20-70 °C (70-160 °F)

SS-1 20-70 °C (70-160 °F)

SS-1h 20-70 °C (70-160 °F)

CRS-1 52-85 °C (125-185 °F)

CSS-1 20-70 °C (70-160 °F)

CSS-1h 20-70 °C (70-160 °F)

4.2.4. Asphalt material shall be applied at the specified rate with uniform distribution over the surface to be treated. All areas and spots missed by the distributor will be properly treated by hand spray. If required, clean, dry sand will be used to soak up excess bituminous material.

Work for

Paving

ASVF 20-0101

PART IV – Base Course Specifications

10. The Contractor shall provide base course that conforms to the specifications in this section.

11. Payment:

11.1. All base course will be paid for on the basis of unit price (cubic meters); this unit price shall include the cost of the material and for delivery to the job site. The Contractor shall provide the COR batch receipts for all trucks to validate the quantities of materials delivered to the job site. Material not meeting the specifications of this Statement of

Work shall be removed and replaced at the Contractor’s expense, or at the sole discretion of the Government, the material can be accepted at a reduced unit price using standard

12. Definitions: Graded-Crushed Aggregate Base Course: Graded-crushed aggregate (GCA) base course is well graded, crushed, durable aggregate uniformly moistened and mechanically stabilized by compaction. GCA has more stringent requirements and it produces a base course with higher strength and stability.

1.1. Submittals: Submit the sampling and testing reports.

1.2. Quality Assurance: Sampling and testing are the responsibility of the Contractor and performed by a testing laboratory. Test the materials to establish compliance with the specified requirements. Furnish copies of test results to the Contracting Officer within 24 hours of completion of the tests.

1.2.1. Sampling: Take samples for laboratory testing in conformance with ASTM

D 75/D 75M or equivalent British standard approved by the CO. When deemed necessary, the sampling will be observed by the COR.

1.2.2. Tests: Perform the following tests in conformance with the applicable standards listed.

1.2.3. Sieve Analysis: Make sieve analysis in conformance with ASTM C 117 and ASTM C 136 or equivalent British standard approved by the CO.

Sieves shall conform to ASTM E 11 or equivalent British standard approved by the CO.

1.2.4. Liquid Limit and Plasticity Index: Determine liquid limit and plasticity index in accordance with ASTM D 4318 or equivalent British standard approved by the CO.

1.2.5. Moisture-Density Determinations: Determine the laboratory maximum dry density and optimum moisture content in accordance with ASTM D 1557 or equivalent British standard approved by the CO.

1.2.6. Wear Test: Perform wear tests on GCA course material in conformance with ASTM C 131 or equivalent British standard approved by the CO.

1.2.7. Soundness: Perform soundness tests on GCA in accordance with ASTM C 88 or

1.2.8. Testing Frequency

1.2.8.1. Initial Tests: Perform one of each of the following tests, on the proposed material prior to delivery, to demonstrate that the proposed material meets all specified requirements when furnished. If materials from more than one source are going to be utilized, this testing shall be completed for each source.

1.2.8.1.1. Sieve Analysis.

1.2.8.1.2. Liquid limit and plasticity index

1.2.8.1.3. Moisture-density relationship.

1.2.8.1.4. Wear.

1.2.8.1.5. Soundness.

2. PRODUCTS

2.1. Aggregates: Provide GCA consisting of clean, sound, durable particles of crushed stone, crushed limestone, crushed concrete, crushed gravel, angular sand, or other approved material. GCA shall be free of silt and clay as defined by ASTM D 2487 or equivalent British standard approved by the CO, organic matter, and other objectionable materials or coatings. The portion retained on the No. 4 sieve is known as coarse aggregate; that portion passing the No. 4 sieve is known as fine aggregate.

2.1.1. Coarse Aggregate: Provide coarse aggregates with angular particles of uniform density. When the coarse aggregate is supplied from more than one source, aggregate from each source shall meet the specified requirements and shall be stockpiled separately.

2.1.1.1. Crushed Gravel: Crushed gravel shall be manufactured by crushing gravels, and shall meet all the requirements specified below.

2.1.1.2. Crushed Stone: Provide crushed stone consisting of freshly mined quarry rock, meeting all the requirements specified below.

2.1.1.3. Graded-Crushed Aggregate Base Course: GCA coarse aggregate shall not show more than 40 percent loss when subjected to the Los Angeles abrasion test in accordance with ASTM C 131 or equivalent British standard approved by the CO. GCA coarse aggregate shall not exhibit a loss greater than 18 percent weighted average, at five cycles, when tested for soundness in magnesium sulfate, or 12 percent weighted average, at five cycles, when tested in sodium sulfate in accordance with ASTM C 88 or equivalent British standard approved by the CO. The amount of flat and elongated particles shall not exceed 20 percent for the fraction retained on the 12.5 mm (1/2 inch) sieve or 20 percent for the fraction passing the 12.5 mm (1/2 inch) sieve.