Attachment 2 SOW Dated revised 22Apr21.pdf

WHITEMAN AIR FORCE BASE

KNOB NOSTER, MISSOURI

SPECIFICATION FOR REPAIRING AIRFIELD

PAVEMENTS IDIQ

DATE: 14 Sep 2020

SECTION 0100

SUMMARY OF WORK

INDEX

1.1 SCOPE OF WORK

1.2 WORK COORDINATION

1.3 UTILITIES

1.4 GOVERNMENT FURNISHED MATERIALS AND TOOLS

1.5 PORTABLE TOILETS

1.6 SAFETY REQUIREMENTS

1.7 STANDARD PRODUCT

1.8 EXCAVATION PERMITS

1.9 PHYSICAL DATA

1.10 PROTECTION OF EXISTING ROADWAYS

1.11 BASE REGULATIONS

1.12 WORK HOURS

1.13 SECURITY CLEARANCE AND DRIVER’S TRAINING

1.14 EQUIPMENT IDENTIFICATION

1.15 LAYOUT OF WORK

1.16 CONCEALED WORK

1.17 NOTICE OF FINAL INSPECTION

1.18 WORK DELAY BY GOVERNMENT

1.19 APPLICABLE PUBLICATIONS

1.20 SOLID, CONSTRUCTION, DEMOLITION, AND DECONSTRUCTION WASTE

REQUIREMENTS

1.21 ENVIRONMENTAL PROVISIONS

SECTION 0110

SUMMARY OF WORK

1. SCOPE OF WORK: The varieties of work to be expected under this contract are concrete pop out repair, spall repair, full depth slab replacement, installation of aircraft anchor and grounding points, joint sealing/resealing, pavement markings and striping and any other pavement related items as outlined in the estimate sheet(s).

1.1.1 The contractor shall maintain overall cleanliness of the site at the end of each work day. After completion of all activities, and before final inspection, the contractor shall be required to clean the area by removing all dirt, trash, and debris resulting from their work and shall restore the area to its original state of cleanliness.

1.1.2 All concrete removed from the airfield will be properly disposed of, off base, with no additional cost to the government.

1.1.3 Adequate and proficient supervision shall be provided by the contractor throughout all phases of work.

1.1.4 The contractor is responsible for verifying all measurements, quantities, and specific requirements at an on-site visit. If requested, the government and the contractor can measure and figure up quantities and discuss the scope of work together provided a contracting representative is present.

1.2. WORK COORDINATION: The Contractor shall be specifically responsible for the coordination of work to the site and to the work of all trades. It is recommended that the Contractor visit the site and thoroughly familiarize himself with all details of the work and working conditions prior to submission of a bid. The Contractor shall verify all dimensions in the field and advise the Contracting Officer of any discrepancy before performing any work. The airfield pavements adjacent to work areas may be in use by aircraft during construction operations. The Contractor shall exercise extreme caution during contract performance to insure that no equipment, materials, or other items are allowed to enter areas of the airfield other than the immediate work areas. The airfield will be used during construction.

1.3. UTILITIES: All reasonably required amounts of water and electricity shall be made available to the Contractor from Government owned and operated water, and electrical systems without a charge to the Contractor. All temporary lines shall be furnished, installed, connected and maintained by the Contractor (IAW NESC, NEC and the Uniform Plumbing Code) in a workmanlike manner satisfactory to the Contracting Officer or his/her representative and shall be removed by the Contractor at his expense prior to the final acceptance of the construction.

1.4. GOVERNMENT FURNISHED MATERIALS AND TOOLS: No materials or tools will be furnished by the government.

1.5. PORTABLE TOILETS: Workmen shall not be permitted to use Government toilet facilities in existing buildings. The Contractor will be responsible for providing temporary toilet facilities. Locations and type of temporary toilets, shall be approved by the Contracting Officer.

1.6. SAFETY REQUIREMENTS:

1.6.1 General Safety: The contractor is responsible for the erection and maintenance of all safety barricades, shoring, fences, and other devices necessary for safe conditions to protect the work, equipment, workmen, public and others IAW OSHA Law. The contractor shall erect or construct such devices as conditions may require and shall maintain them to provide safe conditions through the construction period and conform to OSHA Regulations and the EM 385-1-1 Safety and Health Requirements.

1.6.2 Fire Protection Requirements: The contractor shall comply with Air Force and local fire regulations and NFPA 241 2019 “Safeguarding Building Construction and Demolition Operations.” Fire extinguishers rated and approved by the National Fire Protection Association, of sufficient size, type, and quantity to cope with all known hazards, shall be provided by the Contractor at the construction site during the execution of this contract.

1.6.3 Ground Fault Circuit: Ground fault circuit interrupters are required on all work on this contract when using extension cords.

1.6.4 Flight line Driving: All vehicle drivers on the airfield will receive training and be issued an AF Form 483. Vehicles that will routinely operate on the airfield shall use yellow rotating beacon lights that are visible on top of the vehicles. Vehicles that are not marked and lighted must be escorted by one that is equipped with a yellow rotating beacon in the same fashion.

Contractor vehicles require passes issued by airfield management and must be marked with identifying characters. Contractor vehicles are required to be equipped with a FOD (Foreign Object Debris) can. A construction vehicle traffic plan will be developed for each delivery order.

1.6.5 Construction Limits: Open trenches, excavations, and stockpiled material at the construction site should be prominently marked with low profile barricades and lighted with flashing yellow light units during hours of restricted visibility and/or darkness.

Stockpiled material will not be allowed on the airfield, only in the contractors approved “lay-down” yard. The contractor shall have a person designated on call 24 hours a day for emergency maintenance of airport hazard lighting and barricades when in use.

1.7. STANDARD PRODUCT: Reference to particular brand name or manufacturer’s catalog number in the specifications or on the drawings is not to be construed as a recommendation for a certain manufacturer’s product over others. These references are made solely as a guide to type and quality of products. Any approved or “equal” product is implied in all cases. All new components shall be compatible with the existing equipment and structures and shall be at least as good as those specified.

1.8. EXCAVATION PERMIT: Prior to any excavation, the contractor shall be responsible for obtaining an approved Base Civil Engineering Work Request (Dig Permit), AF Form 103, authorizing the excavation work and locating utility lines and/or cables in the areas of excavation. Any damage to utility lines or cables shown on the permit, outside the area covered by the permit, or prior to receipt of the permit, resulting from excavation by the contractor shall be paid for by the contractor. Air Force form 103, Base Civil Engineering Work Request (Dig Permit), will be provided by C.E. The contractor shall hand carry the form to all the agencies listed on the document for their signatures and direction.

1.9. PHYSICAL DATA: Information and data furnished or referred to below are furnished for the contractor’s information. Physical conditions indicated on the drawings and in the specifications are the result of site investigations. However, it is expressly understood that the government will not be responsible for any interpretation or conclusion drawn by the contractor.

1.10. PROTECTION OF EXISTING ROADWAYS: The contractor shall protect existing streets and roadways from damage by trucks and equipment. Any pavement or subgrade damaged, shall be repaired in a manner acceptable to the Contracting Officer at no additional cost to the government. Any dirt or debris dropped or tracked onto pavement surfaces shall be promptly removed by manual means or power brooms/street sweeper, the same day it is used.

1.11. BASE REGULATIONS: All activities of the contractor and his/her employees, and of all subcontractors and their employees while on the base, shall be conducted in strict accordance with all base regulations, including those of the fire marshal.

1.11.1 ENTRY TO WHITEMAN AIR FORCE BASE: Whiteman AFB is a closed base pursuant to Sec. 21, Internal Security Act of 1950, 50 U.S.C. 797 and, as such, only those persons granted permission may enter. It is, however, required that control be exercised over contractor personnel while working on the base. To maintain this control, a listing of all contractor personnel and subcontractor’s personnel that shall be working under the Contract, must be submitted to the Contracting Officer five (5) working days prior to start of work under this contract. The listing shall include, but not be limited to: Contract Number, Project Number, Employee: Name, Home Address, Badge Number, date and place of birth, Social Security number, and the estimated starting and ending date of each employee. Subsequent listings of all additions or deletions shall be submitted as employees are hired or released. The contractor is on notice that delays should be expected for entry onto the base and as such, no equitable adjustments to the contract shall be made as a result for these delays.

1.12. WORK HOURS: Normal work hours at Whiteman AFB are 6:00A.M. through 6:00 P.M., Monday through Friday. Work to be accomplished at other than the above hours shall require approval of the Contracting Officer. The following listed are holidays observed by the Government. Any work accomplished on these days shall require prior approval by the Contracting Officer.

New Years Day Martin Luther King, Jr’s Birthday

President’s Day Memorial Day

Independence Day Labor Day

New Founders Day Veterans Day

Thanksgiving Day Christmas

1.13. SECURITY CLEARANCE AND DRIVERS TRAINING: All primary contractor personnel shall apply for and obtain security badges. Site supervisors/leads will be issued badges with vouching authority. All personnel that will be driving on the airfield shall complete a flight line drivers training course and subsequently carry a flight line driver’s permit while operating a vehicle on the airfield.

1.14. EQUIPMENT IDENTIFICATION: All contractor’s machinery, motor vehicles, and mechanized equipment shall have acceptable identification showing the owner’s name.

This identification shall be posted in a conspicuous location on each piece of equipment.

1.15. LAYOUT OF WORK: The contractor shall furnish, at his own expense, all survey equipment, stakes, templates, platforms, equipment, tools, materials and labor as may be required in laying out the work from the baselines and the benchmarks. The contractor shall be held responsible for the execution of the work to such lines and grades as may be established. It shall be the responsibility of the contractor at his/her cost to maintain and preserve all survey stakes and other marks established until authorized to remove them.

Where established stakes or control points are destroyed through the contractor’s negligence or in the performance of the required work, the contractor shall reestablish such marks, as applicable, in order to properly lay out the work and to permit checking of the work. Should any discrepancy be discovered between actual measurements which prevents following good practice or the intent of the drawing and specification, the contractor shall notify the contracting officer and the contractor shall not proceed with the work until instructions have been given.

1.16. CONCEALED WORK: All items of work to be concealed shall be government inspected prior to concealment. The contractor shall notify the contracting officer or his/her representative of the intention to conceal a minimum of 24 hours in advance and no item shall be concealed until the contractor has received approval to do so.

1.17. NOTICE OF FINAL INSPECTION: The contractor shall give the contracting officer or his/her representative a minimum of three working days advance notice of the date the work will be ready for final inspection.

1.18. WORK DELAY BY THE GOVERNMENT: The contractor may be requested to stop work for up to 15 days per calendar year, with five (5) days to be consecutive due to mission, exercises, or air shows. The anticipated time frame for these delays are unknown at this point in time.

1.19. APPLICABLE PUBLICATIONS: Work shall conform to the most current edition of publications identified in the specifications such as American Society for Testing and Materials (ASTM), Airfield Standards for Construction, ETL’s, American Concrete Institute (ACI) standards, etc.

1.20. SOLID, CONSTRUCTION, DEMOLITION, AND DECONSTRUCTION

WASTE REQUIREMENTS: The areas affected by this contract shall be kept in a reasonably tidy condition throughout the construction period.

1.20.1 The Contractor shall comply with, but not limited to: (Executive Order 13423, Strengthening Federal Environmental, Energy, and Transportation Management, dated 26 Jan 07; Executive Order 13514, Federal Leadership in Environmental, Energy, and Economic Performance, dated 7 Oct 09; Office of the Under Secretary of Defense Memo, DoD Integrated (Non-Hazardous) Solid Waste Management Policy, dated 1 Feb 08, and AFI 32-7042, Waste Management.

1.20.2 The Contractor shall generate the least amount of solid waste as possible, maximize pollution prevention processes, and maximize landfill diversion efforts through source reduction, reuse of materials, and recycling.

1.20.3 The Contractor shall segregate all divertible, reusable, and recyclable materials, but not limited to: wood; green waste; concrete; asphalt; brick; cardboard; metals; paper, plastics, glass, serviceable items, salvageable items, and clean soils so that these items can be diverted off base.

The Contractor shall turn in by appointment, all Government purchased serviceable or salvageable items, except for locks, latches, and cylinders to the 509th Logistics Readiness Squadron, Base Supply, and Equipment Management. The Contractor shall turn in all other serviceable or salvageable items, except for locks, latches, and cylinders to the Defense Logistics Agency Disposition Service (DLADS). The Contractor shall segregate all scrap metal into ferrous and nonferrous metals and cut, dismantle, palletize, test, or prepare documentation as required for acceptance by the DLADS.

1.20.4 The Contractor shall only dispose of acceptable municipal solid waste at certified landfills.

1.20.5 The Contractor shall not dispose of any hazardous waste, designated waste, radioactive waste, serviceable items, salvageable items, green waste, concrete, or asphalt in municipal solid waste landfills. These shall be properly disposed, diverted, recycled, or reused.

1.20.6 The Contractor shall provide contractual proof, upon request of the landfill contractor operator, that the Contractor is authorized to use the municipal solid waste landfill. This allows the government to maintain compliance with landfill record keeping requirements.

1.20.7 The Contractor shall provide, for every load destined for the municipal solid waste landfill, a signed “Landfill Access Ticket”. The “Landfill Access Ticket” verifies that the solid waste was generated by a valid 509 BW project and meets the landfill disposal requirements. A Contractor’s signed “Landfill Access Ticket” shall include, but not limited to, the following information: the contract number; prime contractor’s name and phone number; subcontractor’s name and phone number (as applicable); source where the material was generated: project name and facility name or number. The “Landfill Access Ticket” shall be signed by the Government Construction Representative, include name and phone number, or if authorized by the Government, designating the Contractor’s representative the authority to sign the “Landfill Access Ticket”.

1.20.8 The Contractor shall submit monthly to the 509th CES/CEAN, Solid Waste Manager, (660-687-3272), the weight, quantity, and disposal cost of: 1) Municipal Solid Waste; and

2) Construction & Demolition debris disposed on or off-base.

1.20.9 The Contractor shall submit monthly to the 509th CES/CEAN, Solid Waste Manager, (660- 687-3272), the weight, quantity, and diversion cost of: 1) Municipal Solid Waste; and 2) Construction & Demolition debris diverted (used as daily cover, reused, or recycled) from disposal at the local permitted landfill. Municipal Solid Waste shall be itemized into the following diversion categories: compost, mulch, recycle, reuse, and donation.

1.21. ENVIRONMENTAL PROVISIONS: The contractor is responsible for strict adherence to any local, state or federal environmental regulations relating to this contract.

509 CES is the base point of contact for environmental compliance and non-compliance issues, and will provide the contractor a briefing of environmental requirements at the pre-performance conference for this contract.

Section 2 Specifications

Index

2.1 Site work & Demolition

2.2 Portland Cement Stabilized Base Course

2.3 Bituminous Paving for Airfields

2.4 Plant, Equipment, Machines, and Tools

2.5 Runway Grooving

2.6 Concrete for Airfield Patching/pop out repair

2.7 Joint Sealing and Resealing of Joints in Concrete Pavements for Airfields

2.8 Pavement Markings

SECTION 2.1 SITEWORK DEMOLITION

2.1.1 AVAILABILITY OF WORK AREAS: All work must be coordinated with the Airfield Manager. The runway and operational taxiways and portions of the Main Apron will be closed to construction traffic. Scheduling of work and coordination with the helicopter and aircraft activity will be the subject of discussion during the preconstruction conference.

2.1.2 SCOPE: The work included in this section consists of the removal and disposal of airfield pavement material. Cleaning and resealing of joints is covered in SECTION 2.7:

JOINT SEALING AND RESEALING OF JOINTS IN CONCRETE PAVEMENTS FOR

AIRFIELDS.

2.1.3 SUBMITTALS: The procedures proposed for the accomplishment of salvage and demolition work shall be submitted for approval. The procedures shall provide for safe conduct of the work, careful removal and disposition of materials specified to be salvaged, protection of property which is to remain undisturbed, coordination with other work in progress. The procedures shall include a detailed description of the methods and equipment to be used for each operation, and the sequence operations.

2.1.4 PROTECTION OF EXISTING WORK: Before beginning any cutting or demolition work, the Contractor shall carefully survey the existing work and examine the drawings and specifications to determine the extent of the work and shall obtain prior approval from the Contracting Officer or his representative of pavement areas to be sawed and removed. The Contractor shall take all necessary precautions to insure against damage to existing work to remain in place, to be reused, or to remain the property of the Government. Any damage to such work shall be repaired or replaced as approved by the Contracting Officer or his representative at no additional cost to the Government. The Contractor shall carefully coordinate the work of this section with all other work.

2.1.5 DUST CONTROL: The amount of dust resulting from demolition shall be controlled to prevent the spread of dust to occupied portions of the airfield and to avoid creation of a nuisance in the surrounding area. Use of water will not be permitted when it will result in, or create, hazardous or objectionable conditions such as ice, flooding and pollution.

2.1.6 BURNING: The use of burning at the project site for the disposal of refuse and debris will not be permitted.

2.1.7 USE OF EXPLOSIVES: Use of explosives will not be permitted.

2.1.8 DISPOSITION OF MATERIAL:

2.1.8.1 Title to Materials: Title to all materials and equipment to be demolished is vested in the Contractor upon receipt of Notice to Proceed. The Government will not be responsible for the condition, loss or damage to such property after notice to proceed.

2.1.8.2 Unsalvageable Materials: Concrete and old paint sealant shall be disposed of off Government controlled property at the Contractor’s expense.

2.1.9 CLEANUP:

2.1.9.1 Debris Control: Remove and transport debris in a manner as to prevent spills on streets or adjacent areas. It is imperative that construction debris spilled on the pavement be cleaned up immediately.

2.1.9.2 Regulations: Local (City, County and State) regulations regarding hauling and disposal apply.

Section 2.2 Portland Cement Stabilized Base Course

2.2.1 REFERENCES: The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by basic designation only.

AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)

ASTM C 136-96a Sieve Analysis of Fine and Coarse Aggregates

ASTM C 150-97e1 Portland Cement

ASTM C 171-97 Sheet Materials for Curing Concrete

95-03 Blended Hydraulic Cements ASTM D 75-87(1992)e1

Sampling Aggregates

ASTM D 422-63(2007) Particle-Size Analysis of Soils

ASTM D 558-96 Moisture-Density Relations of Soil-Cement Mixtures

ASTM D 559-96 Wetting and Drying Compacted Soil-Cement Mixtures

ASTM D 977-91 Emulsified Asphalt

ASTM D 1241-68(1994)e1 Materials for Soil-Aggregate Subbase, Base, and

Surface Courses ASTM D 1250-80(2002)e1 (1980; R 1990) Petroleum Measurement

Tables

ASTM D 1556-90(1996)e1 Density and Unit Weight of Soil in Place by the Sand-Cone Method

ASTM D 1557-91 Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/cu. ft.(2,700 kN-m/cu. m.))

ASTM D 1632-96 Making and Curing Soil-Cement Compression and Flexure Test

Specimens in the Laboratory

ASTM D 1633-96 Compressive Strength of Molded Soil-Cement Cylinders

922-91 Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth)

017-96 Water Content of Soil and Rock in Place by Nuclear Methods (Shallow Depth)

ASTM D 4318-95a Liquid Limit, Plastic Limit, and Plasticity

Index of Soils ASTM E 11-95 Wire-Cloth Sieves for Testing Purposes

2.2 DEFINITION: Portland-cement-stabilized base course, as used herein, is a mixture of portland cement and select borrow material uniformly blended and thoroughly compacted to produce a pavement course which meets all criteria as set forth in the plans and specifications.

2.3 SUBMITTALS: Government approval is required for submittals as shown on AF Form 66.

Stabilizing Course The proposed mix shall be developed using aggregate material which conforms to all requirements herein. The stabilized course shall have a minimum compressive strength of 1500 psi at 7 days of age.

Submit certified copies of aggregate test results, not less than 30 days before the material is required in the work. Submit calibration and related test results prior to using the device or equipment being calibrated.

Certificates Bituminous

Material

Certified copies of the manufacturer's test reports indicating compliance with applicable specified requirements, not less than 30 days before the material is required in the work.

Records Stabilizing

Course

Notification of sources from which aggregates are to be obtained, within 15 days after the award of contract.

Source of Bituminous Materials

Notification of sources from which bituminous materials are to be obtained within 15 days after the award of the contract.

2.4 PLANT, EQUIPMENT, MACHINES, AND TOOLS

2.4.1 General Requirements: Plant, equipment, machines, and tools used in the work shall be subject to approval and shall be maintained in a satisfactory working condition at all times.

The equipment shall be adequate and shall have the capability of producing the required compaction, meeting grade controls, thickness control and smoothness requirements as set forth herein. A test section of at least 8 feet by 100 feet, utilizing the equipment and procedures proposed for use by the Contractor, shall be placed to demonstrate that the base course stabilization conforming to this specification can be produced.

2.4.2 Central-Plant: The central plant shall be capable of producing a uniform cement-treated mixture at the required cement and moisture contents. Aggregate and cement shall be dry-mixed sufficiently to prevent cement balls from forming when water is added.

2.4.3 Straightedge: The Contractor shall furnish and maintain at the site, in good condition, one 12- foot straightedge for each bituminous paver, for use in the testing of the finished surface.

Straightedges shall be made available for Government use. Straightedges shall be constructed of aluminum or other lightweight metal and shall have blades of box or box-girder cross section with flat bottom reinforced to insure rigidity and accuracy. Straightedges shall have handles to facilitate movement on pavement.

2.5 WEATHER LIMITATIONS: Cement shall not be applied when the atmospheric temperature is less than 40 degrees F. No cement shall be applied to aggregate that is frozen or contain frost, or when the underlying material is frozen. If the temperature falls below 35 degrees F, completed cement-treated areas shall be protected against detrimental effects of freezing. Any areas of completed base that are damaged by freezing, rainfall, or other weather conditions shall be brought to a satisfactory condition in conformance with this specification without additional cost to the Government.

2.6 MATERIALS

2.6.1 Cement: Cement shall conform to ASTM C 150, Type II, low alkali.

2.6.2 Bituminous Material: Bituminous material shall conform to one of the following:

2.6.2.1 Emulsified Asphalt: ASTM D 977, Type RS-1 or RS-2.

2.6.4 Material to be Stabilized: The aggregate to be stabilized shall consist of select material conforming to ASTM D 1241, Type I, Grading B or C. Stones retained on a 2 inch sieve and deleterious substances such as sticks, debris, and organic matter shall be removed.

2.6.5 Water: Water shall be clean, fresh, and free from injurious amounts of oil, acid, salt, alkali, organic matter, and other substances deleterious to the hardening of soil-cement, and shall be subject to approval.

2.6.6 Impervious Sheeting: Sheeting shall conform to ASTM C 171 and shall be white waterproof paper, white opaque polyethylene film or white burlap-polyethylene sheets.

2.7 SAMPLING AND TESTING:

2.7.1 General Requirements: Sampling and testing shall be performed by an approved commercial testing laboratory or by facilities furnished by the Contractor. No work requiring testing shall be permitted until the facilities have been approved. The contractor shall submit data detailing the experience and sufficiency of the laboratory facilities to be used. Tests shall be performed in sufficient numbers and as specified to ensure that materials and compaction meet specified requirements. Copies of the test results shall be furnished to the Contracting Officer within 24 hours of completion of tests.

2.7.2 Test Results: Results shall verify that materials comply with the specification. When a material source is changed, the new material will be tested for compliance. When deficiencies are found, the initial analysis shall be repeated and the material already placed shall be retested to determine the extent of unacceptable material. All in-place unacceptable material shall be replaced or repaired to conform to the contract requirements at no additional cost to the Government.

2.7.3 Aggregate: Tests for determining the suitability of aggregate shall include, but not be limited to: sieve analysis in accordance with ASTM C 136, and ASTM D 422 using sieves conforming to ASTM E 11, liquid limits and plasticity index in accordance with ASTM D 4318.

Aggregate samples for laboratory tests shall be taken in accordance with ASTM D 75.

Specimens to be used for unconfined compression tests shall be prepared in accordance with ASTM D 1632 except that a 4 inch diameter by 8 inch high mold shall be used to prepare specimens when more than 35 percent of the material is retained on the No. 4 sieve.

2.7.4 Initial Sampling and Testing:

2.7.4.1 Laboratory Density: Moisture-density tests shall be conducted in accordance with the procedure contained in ASTM D 558, however the apparatus and procedures outlined in ASTM D 1557 shall be used to compact the soil-cement mixture.

2.7.4.2 Unconfined Compression Testing: Unconfined compression tests shall be conducted in accordance with ASTM D 1633. Three tests shall be conducted for each mix design tested.

Samples shall be cured at a constant moisture content and temperature for 7 days.

2.7.4.3 Sieve Analysis: A minimum of one analysis shall be performed for each 1000 tons of material to be stabilized, with a minimum of three analyses for each day's run until the course is completed. When the source of materials is changed and deficiencies are found, the analysis shall be repeated and the material already placed shall be retested to determine the extent of unacceptable material. All in-place unacceptable material shall be replaced at no additional cost to the Government.

2.7.4.4 Liquid Limit and Plasticity Index: One liquid limit and plasticity index shall be performed for each sieve analysis. Liquid limit and plasticity index shall be in accordance with ASTM D 4318.

2.7.5 Sampling and Testing During Construction: Quality control sampling and testing during construction shall be performed as required in paragraph 2.15 FIELD QUALITY CONTROL.

2.8 GENERAL REQUIREMENTS: Cement shall not be applied if the aggregate moisture content exceeds optimum moisture content specified for the cement-treated mixture. After mixing is completed, the proportions of the mixture shall be in accordance with the approved mix design. When application of water and mixing are completed, on the basis of dry weight, moisture shall not be below the optimum moisture content of the mixture nor shall it be more than 2 percent above the optimum moisture content. When the stabilized course is constructed in more than one layer, the previously constructed layer shall be cleaned of loose and foreign matter by sweeping with power sweepers or power brooms, except that hand brooms may be used in areas where power cleaning is not practicable. Adequate drainage shall be provided during the entire construction period to prevent water from collecting or standing on the areas to be stabilized or on pulverized, mixed, or partially mixed material. Line and grade stakes shall be provided as necessary for control. Grade stakes shall be placed in lines parallel to the centerline of the area under construction and suitably spaced for string lining.

2.9 OPERATION OF BORROW PITS: Borrow material shall be obtained from approved off-base sources.

2.10 STOCKPILING MATERIALS: Aggregate material for stabilizing shall be stockpiled in the manner and at the locations designated. Before stockpiling of material, the storage sites shall be cleared, drained, and leveled.

2.11 INSTALLATION:

2.11.1 General Requirements: Subgrade shall conform to SECTION 4 CONCRETE PAVEMENT

FOR ROADS AND AIRFIELDS.

2.11.2 Edges of Stabilized Course: Approved material shall be placed along the edges of the stabilized course in such quantity as will compact to the thickness of the course being constructed, or to the thickness of each layer in a multiple-layer course, allowing at least a 1 foot width of the shoulder to be rolled and compacted simultaneously with the rolling and compacting of each layer of the stabilized course.

2.11.3 Central-Plant Method: The mixture shall be hauled to the job in trucks equipped with protective covers. Underlying course shall be thoroughly moistened and the material shall be deposited on the prepared area in such quantity that will produce a compacted base of uniform density to the required grade and cross section. Spreading or spreading-trimming equipment shall be so constructed and operated as to produce a layer of material which is uniform in thickness and surface contour and free from irregularities in density. Spreading or spreading-trimming equipment shall be used in sufficient numbers and operated in staggered formation to obtain full-width spreading in one construction operation. Not more than 60 minutes shall elapse between the start of the moist mixing and the start of compaction of the treated layer.

Not more than 30 minutes shall elapse between the placements of the cement treated aggregate in adjacent lanes on two-lane structures at any location.

2.11.4 Layer Thickness: Compacted thickness of the stabilized course shall be as indicated.

No layer shall be in excess of 8 inches nor less than 4 inches in compacted thickness.

2.11.5 Compaction: Density of the compacted aggregate-cement mixture shall be at least 100 percent of the maximum density obtained from the laboratory prepared samples. Loose mixture shall be uniformly and continuously compacted until the entire depth and width of the area are compacted to the density specified herein. The moisture content at the surface shall be maintained near optimum at all times through the rolling but shall be less than that quantity which will cause the aggregate-cement mixture to become unstable during compaction.

Rolling shall begin at the outside edge of the surface and proceed to the center, overlapping on successive trips at least one-half the width of the roller. Alternate trips of the roller shall be slightly different lengths. Speed of the roller at all times shall be such that displacement of the mixture does not occur. Areas inaccessible to rollers shall be compacted with mechanical tampers.

2.12 FINISHING: The surface shall be shaped to the required lines, grades, and cross section. If necessary, the surface shall be lightly scarified to eliminate any imprints made by the compacting or shaping equipment. The surface shall then be thoroughly compacted to the specified density with rubber-tired rollers and smooth-wheel tandem rollers to the extent necessary to provide a smooth, dense, uniform surface that is free of surface checking, ridges, or loose material, and that conforms to the crown, grade, and line indicated. These finishing operations shall be completed within 2 hours after completion of mixing operations. In places not accessible to finishing and shaping equipment, the mixtures shall be compacted with mechanical tampers to the density specified and shall be shaped and finished by hand methods.

Any portion of the compacted mix that has density less than that specified, that has not properly hardened, or that is improperly finished shall be corrected as specified below.

2.13 CONSTRUCTION JOINTS: At the end of each day’s construction, a straight transverse construction joint shall be formed by cutting back into the completed work to form a true vertical face free of loose or shattered material. Material along construction joints not properly compacted shall be removed and replaced with aggregate-cement that is mixed, moistened, and compacted in accordance with this specification.

2.14 CURING AND PROTECTION: The finished surface shall be protected against rapid drying for 7 days by one of the methods specified.

2.14.1 Burlap: Burlap covers shall consist of two or more layers of burlap having a combined weight of 14 ounces or more per square yard in a dry condition. Burlap shall be either new or shall have been used only for curing concrete. Burlap strips shall have a length, after shrinkage, at least 1 foot greater than necessary to cover the entire width and edges of the finished stabilized area. Mats shall overlap each other at least 6 inches. Mats shall be thoroughly wetted before placing and shall be kept continuously wet and in intimate contact with the surface and edges of the finished stabilized area for the entire curing period.

2.14.2 Impervious Sheeting: The surface of the finished stabilized area shall be moistened with a fine spray of water and then covered with impervious sheeting. The burlap of the polyethylene-coated burlap shall be thoroughly saturated with water before placing. Sheeting shall be placed with the light-colored side up. Sheets shall extend over the edges of the stabilized area and shall be held securely in place throughout the curing period. Edges of sheets shall overlap each other at least 12 inches and shall be securely cemented or taped to form continuous closed joints. Tears and holes in sheets shall be repaired immediately.

2.14.3 Bituminous Material: Bituminous material shall be uniformly applied by means of a bituminous distributor within a temperature range of 75 degrees F to 130 degrees F, for RS-1 and 110 degrees F to 160 degrees F for RS-2 as directed. Bituminous material for curing shall be uniformly applied at the rate of 0.2 to 0.25 gallon per square yard. Areas inaccessible to or missed by the distributor shall be properly treated using the manually operated hose attachment.

Bituminous material shall be applied only to the top layer. At the time the bituminous material is applied, the surface shall be free of loose or foreign matter and shall contain sufficient moisture to prevent excessive penetration of the bituminous material. When necessary, water in sufficient quantity to fill the surface voids shall be applied immediately before the bituminous material is applied. Treated surface shall be sanded or dusted to prevent the bituminous material from being picked up by traffic.

2.15 FIELD QUALITY CONTROL:

2.15.1 Grade Control: Underlying material shall be excavated to sufficient depth for the required stabilized- course thickness so that the finished stabilized course with the subsequent surface course will meet the fixed grade. Finished and completed stabilized area shall conform to the lines, grades, cross section, and dimensions indicated.

2.15.2Smoothness Test: The surface of a stabilized layer shall show no deviations in excess of 3/8 inch when tested with the 12- foot straightedge. Deviations exceeding this amount shall be corrected by removing material and replacing with new material as directed. Measurements for deviation from grade and cross section shown shall be taken in successive positions parallel to the paving lane centerline with a 12- foot straightedge. Measurements shall also be taken perpendicular to the paving lane centerline at 50- foot intervals.

2.15.3 Thickness Control: The completed thickness of the stabilized course shall be within 1/2 inch of the thickness indicated. Where the measured thickness is more than 1/2 inch deficient, such areas shall be corrected by scarifying, adding mixture of proper gradation, re-blading, and re-compacting as directed. Where the measured thickness is more than 1/2 inch thicker than indicated, the course shall be considered as conforming with the specified thickness requirements. Average job thickness shall be the average of all thickness measurements taken for the job, but shall be within 1/4 inch of the thickness indicated. The thickness of the stabilized course shall be measured at intervals in such a manner as to ensure one measurement for each 500 square yards of stabilized course. Measurements shall be made in 3 inch diameter test holes penetrating the stabilized course.

2.15.4 Testing: Field tests shall be performed in sufficient numbers to assure that the specifications are being met. Testing shall be the responsibility of the Contractor and shall be performed by an approved commercial laboratory.

2.15.5 Field Density: Field density tests shall be performed in accordance with ASTM D 1556 or ASTM D 2922. ASTM D 2922 results in a wet unit weight of soil, and when using this method, ASTM D 3017 shall be used to determine the moisture content of the soil. Calibration curves furnished along with the density gauge shall be checked as described in ASTM D 3017.

Calibration checks of the density gauge shall be made at the beginning of a job on each type of material encountered. If ASTM D 2922 is used, in-place densities shall be checked by ASTM D 1556 at least once per lift for each 4000 square yard of stabilized material. Calibration curves and calibration test results shall be furnished within 24 hours of conclusion of the tests. At least one field density test shall be performed for each 1000 square yards of each layer of base material.

2.15.6 Maintenance: The stabilized area shall be maintained in a satisfactory condition until the completed work is accepted. Maintenance shall include immediate repairs to any defects and shall be repeated as often as necessary to keep the area intact. Defects shall be remedied as specified herein.

2.15.7 Traffic: Completed portions of the cement-treated base area may be opened immediately to light traffic provided the curing is not impaired and the surface has been sanded. After the curing period has elapsed, completed areas may be opened to all traffic provided that the cement-stabilized course has hardened sufficiently to prevent marring or distorting of the surface by equipment or traffic. Heavy equipment shall not be permitted on the area during the curing period. Finished portions of cement- stabilized base that are traveled on by equipment used in constructing an adjoining section shall be protected in a manner so as to prevent equipment from marring, or damaging the completed work.

2.15.8 DISPOSAL OF UNSATISFACTORY MATERIALS: Material that is removed for the required correction of defective areas, waste material, and debris shall be disposed of off Government controlled land.

Section 3 Bituminous Paving for Airfields

Whiteman AFB does not have any bituminous pavement on the runway. It does have it on Taxiway Delta, the shoulders and the overruns. The type of bituminous paving to be utilized will be the SUPERPAVE hot mix that is outlined in the MODOT specifications for roads and bridges. PG-76 asphalt will be used.

3.1 Unless otherwise directed, bituminous courses shall not be constructed when temperatures of the existing surface is below 40 degrees F.

3.2 After final rolling, no vehicular traffic of any kind shall be permitted on the pavement until it has cooled to 140 degrees F.

3.3 Standard Construction Practices of milling bituminous pavements will be utilized.

SECTION 4

CONCRETE PAVEMENT FOR ROADS AND AIRFIELDS

4.1 APPLICABLE PUBLICATIONS: The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only.

4.1.1 FEDERAL STANDARD (FED STD).

H-28 1A Sep 90 Screw-Thread Standards for Federal Services Supp l. 1A

4.1.2 CORPS OF ENGINEERS PUBLICATIONS.

CRD-C 55-92 Test Method for Concrete Uniformity

CRD-C 100-75 Sampling Concrete Aggregate and Aggregate Sources, and Selection of Material for Testing

CRD-C 104-80 Method of Calculation of the Fineness Modulus of Aggregate

CRD-C 112-69 Surface Moisture in Aggregate by Water Displacement

CRD-C 114-94 Soundness of Aggregates by Freezing and Thawing of concrete specimens

CRD-C 119-91 Flat and Elongated Particles in Coarse aggregate.

CRD-C 130-89 Scratch Hardness of Coarse Aggregate Particles

CRD-C 300-90 Membrane-Forming Compounds for Curing Concrete

CRD-C 400-63 Water for Use in Mixing or Curing Concrete

CRD-C 572-74 Polyvinylchloride Waterstop

4.1.3 US DEPARTMENT OF COMMERCE, NATIONAL BUREAU OF STANDARDS

HANDBOOK. HB44-95 Specifications, Tolerances, and Other Technical Requirements for

Weighing and Measuring Devices (1983)

4.1.4 AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION

OFFICIALS (AASHTO)

M 254 Corrosion Resistant Coated Dowel Bars

M 284 Epoxy Coated Reinforcing Bars

4.1.5 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) WITH

CORRESPONDING CRD STANDARD INDICATED WHERE AVAILABLE.

A 36-97a Carbon Structural Steel

A 53-97 Pipe, Steel, Black and Hot-Dipped Zinc Coated (Galvanized) Welded and Seamless for Ordinary Uses

A 184-90 Fabricated Deformed Steel Bar Mats for Concrete Reinforcement (CRD- C562)

A 185-97 Welded Steel Wire Fabric for Concrete (CRD-C 510) reinforcement

A 497-97 Steel Welded Wire Fabric, Deformed, for Concrete Reinforcement

A 615-96A Deformed and Plain Billet-Steel Bars for Concrete Reinforcement (CRD-C 501)

A 616-96 Rail-Steel Deformed and Plain Bars for Concrete reinforcement (CRD-502)

A 617-96A Axle-Steel Deformed and Plain Bars for Concrete Reinforcement (CRD-C 519)

A 675-90a(1995) Steel Bars, Carbon, Hot-Wrought, Special Quality, Mechanical properties

C 31-96 Making and Curing Concrete Test Specimens in the Field (CRD-C 11)

C 33-97 Concrete Aggregates

C 40-92 Organic Impurities in Fine Aggregate for Concrete (CRD-C 121)

C 70-94 Surface Moisture in Fine Aggregate (CRD-C 111)

C 78-94 Flexural Strength of Concrete (Using Simple Beam with Third-Point Loading) (CRD-C 16)

C 87-83(1995) Effect of Organic Impurities in Fine Aggregate on Strength of Mortar (CRD-C 116)

C 88-90 Soundness of Aggregates by Use of Sodium (CRD-C 137) Sulfate or Magnesium Sulfate

C 94-97 Ready-Mixed Concrete (CRD-C 31)

C 117-95 Materials Finer Than 75 um (No. 200) Sieve in (CRD-C 105) Mineral Aggregates by Washing

C 123-96e1 Lightweight Pieces in Aggregate (CRD-C 122)

C 127-88(1993) Specific Gravity and Absorption of Coarse Aggregate

C 131-96 Resistance to Degradation of Small Size Coarse(CRD-C 117) Aggregate by abrasion and Impact in the Los Angeles Machine

C 136-96a Sieve Analysis of Fine and Coarse Aggregates (CRD-C 103)

C 142-78(1990)Clay Lumps and Friable Particles in Aggregates (CRD-C 142)

C 143-97 Slump of Portland Cement Concrete (CRD-C 5)

C 150-97e1 Portland Cement (CRD-C 201)

C 171-97 Sheet Materials for Curing Concrete (CRD-C 310)

C 172-90 Sampling Freshly Mixed Concrete

C 174-97 Measuring Length of Drilled Concrete Cores (CRD-C 28)

C 192-95 Making and Curing Concrete Test Specimens in the Laboratory (CRD-C 10)

C 227-90 Potential Alkali Reactivity of Cement Aggregate Combinations (Mortar Bar Method)

C 231-97 Air Content of Freshly Mixed Concrete by the Pressure Method (CRD-C 41)

C260-95 Air-Entraining Admixtures for Concrete

C 295-90 Petrographic Examination of Aggregates for Concrete (CRD-C 127)

C 311-97 Sampling and Testing Fly Ash or Natural Pozzolans for use as a Mineral Admixture in Portland Cement Concrete

C 494-92 Chemical Admixtures for Concrete (CRD-C 87)

C 566-97 Total Moisture Content of Aggregate by Drying (CRD-C 113)

C 618-97 Fly Ash and Raw or Calcined Natural Pozzolan for use as a Mineral Admixture in Portland Cement Concrete

C 881-90 Epoxy-Resin-Base Bonding Systems for Concrete

D 1751-83(1991) Preformed Expansion Joint Fillers for Concrete Paving and Structural Construction (Non-extruding and Resilient Bituminous Types) (CRD-C 508)

D 1752-84(1996)e1 Preformed Sponge Rubber and Cork Expansion (CRD-C 509)

Joint Fillers for Concrete Paving and Structural Construction

4.2 GENERAL:

4.2.1 COMPOSITION. Concrete shall be composed of cement, fine aggregate, coarse aggregate, water and an air-entraining admixture. At the Contractor's option, fly ash may be used as a partial replacement of portland cement, subject to the requirements specified hereinafter. If fly ash is used, the Contractor will be entitled to no additional compensation or extension of time due to the requirements specified for its use or any effect its use may have on the extent or nature of his operations. If fly ash is used, it shall be in the proportion of 20 percent of the total cementitious material by absolute volume, based on the specific gravities of the two materials.

4.2.2 PAVING PROCEDURE. Concrete shall be placed and finished by means of standard placing and finishing equipment and procedures using fixed forms or, if approved, shall be placed and finished by means of slip-form paving equipment and procedures. Approval of the use of slip-form paving equipment and procedures will be based on satisfactory performance on the job. If slip-form paving is proposed for use on airfield pavement, the Contractor shall construct at least two test sections at the start of the job, at least one single lane and one fill-in lane, to demonstrate the capability of his equipment and procedures. Each test section shall consist of at least 300 feet of paving lane and shall be at an approved location in or near one edge of the pavement. Each test section will be evaluated for approval separately.

4.2.3 STRENGTH AND AIR CONTENT. The Contractor will select the proportions for the concrete mixtures, using approved materials. The concrete shall be designed to have an average flexural strength of 650 psi at 90 days as determined by ASTM C 78, using the mixture proportion requirements specified in paragraph MIXTURE PROPORTIONS. The field acceptance strength shall be the 14 day strength that corresponds with the 90 day strength as determined from the mix design. The air content of the concrete by volume shall be maintained by the Contractor at 6 percent plus or minus 1 percent.

4.2.4 CONCRETE MIX DESIGN: Trial mixes having proportions, air content, and slump suitable for the work shall be based on ACI 211.1, using at least three different water-cementitious material ratios which will produce a range of strengths encompassing that required for the work. The mixes shall be designed for maximum permitted air and slump. For each water-cementitious material ratio, at least three test beams for each test age shall be made and cured in accordance with ASTM C 192. The beams shall be tested at 14, 28, and 90 days, in accordance with ASTM C 78, as applicable. From these test results, a curve shall be plotted showing the relationship between water cementitious material ratio and strength. The maximum allowable water-cementitious ratio shall be that shown by this curve to produce an average flexural strength 15 percent greater than specified. All fly ash mixtures shall contain fly ash in the proportion of 20 percent of the total cementitious material, by absolute volume (based on the specific gravity of the portland cement and fly ash.) During actual paving operations, no substitutions shall be made in the materials or proportions which were used in the mix design studies, except as specifically approved or directed.

4.2.5 CONTRACTOR'S OPTION: If the Contractor deems it necessary to start paving prior to completion of the 90 day mix design in order to meet phasing schedules, he may come up with…