SOW- B301 Concrete Replacement.pdf

pg. 1

STATEMENT OF WORK

Building 301 Concrete Replacement

XHZG202001092

16 MAY 2022

1. The contractor shall provide all labor, material, tools, equipment and transportation necessary to complete the work identified in this Statement of Work.

2. All debris is to be disposed of off Base with proper documentation in accordance with the waste plan generated by the contractor after the project is awarded.

3. Access and General Protection/Security Policy and Procedures. This standard language is for contractor employees with an area of performance within government controlled installation, facility, or area. The contractor shall comply with all applicable installation/facility access and local security policies and procedures, which may be obtained from the Contracting Officer’s Representative (COR). The contractor shall also provide all information required for background checks to meet installation access requirements to be accomplished by the local installation’s Security Forces, Director of Emergency Services or local Security Office. The contractor shall ensure compliance with all personal identity verification requirements as directed by DoD, HAF and/or local policy. Should the Force Protection Condition (FPCON) change, the Government may require changes in contractor security matters or processes.

a. For Contractors that do not require CAC, but require access to a DoD Facility and/or Installation. Contractor and all associated sub-contractors employees shall comply with adjudication standards and procedures using the National Crime Information Center Interstate Identification Index (NCIC-III) and Terrorist Screening Database (TSDB) (AFI 31-101 and AFI 10-245), applicable installation, facility and area commander installation/facility access and local security policies and procedures (provided by government representative), or, at OCONUS locations, in accordance with status of forces agreements and other theater regulations.

4. All contractor employees, to include subcontractor employees, requiring access to Government Installations, Facilities and Controlled Access areas shall complete AT Level I awareness training within 10 calendar days after contract start date or effective date of incorporation of this requirement into the contract, whichever is applicable. Certificates of completion for each affected contractor employee and subcontractor employee will be maintained by the COR or Antiterrorism Representative.

5. This project is to be in accordance with the current version of the EMS Environmental Protection Statement. A copy of this document will be provided to bidding contractors via sam.gov as an attachment.

6. This project is to be in accordance with the current version of the 138FW Safety and

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Accident Prevention Guide. A copy of this document will be provided to bidding contractors via beta.sam.gov as an attachment.

7. The contractor shall apply all environmental health and safety procedures required by local, state and federal regulations.

8. All work to be performed 7:00 AM to 5:30 PM Monday thru Thursday in accordance with the general conditions stated in the general conditions of the specifications. If alternate work schedule is desired, it must be requested in writing and approved by CE and Security 48 hours prior to the desired schedule.

9. The contractor is required to provide an AF Form 103 (Work Clearance Request) prior to any earthwork or wall penetrations.

10. The contractor is responsible for marking/locating all underground utilities. All base underground utilities are not covered by the Call OKIE service, contractor will be responsible for locating and marking those utilities as well. The only utilities that Call OKIE service will mark is Natural gas and Cox communications. All other utilities to include base communications fiber optic lines, electric, sewer and water will be the contractor’s responsibility to mark. Contractor must have all utilities marked in an area before a dig permit is issued.

a. If a utility is damaged, the contractor will repair per current code specifications or base standards.

11. Prior to any work, the contractor shall submit for approval by CE, one electronic copy of technical literature for all products to be used. Provide Safety Data Sheets for all appropriate products. Provide a Form 889 for all equipment/items that can need maintenance or repairs where parts will need to be purchased to maintain or repair the equipment at a later date.

a. Two Ways to Get a Form 889

i. Check SAM.gov FAR 52.204-26 (Oct 2020)

ii. Use RPA tool (Email DUNS # to info@section889request.com)

12. All DBIDS Contractor passes will be approved by the BCE and issued by SFS after completion of required background checks. Final payment to the general contractor will not be made at the completion of the construction project until all contractor badges have been returned or the continuing need is validated and documented in writing by SFS and BCE personnel.

13. Contractor will be responsible for keeping a log of all debris disposed of off base to include tonnage, volume, and disposal site. This data will need to be readily available through the project for semi-annual data calls or inspections.

14. Contractor will be responsible for submitting an interim 1354 when project is 50% completed and a final 1354 when the project is 100% complete as part of closeout documents.

15. Contractor will be responsible for filling out and maintain form AF66 submittal register.

16. Period of Performance for this project is 90 days.

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17. The Contractor shall provide a submittal register and project schedule prior issuance of NTP.

18. Contractor must be escorted at all times by base personnel inside the fence surrounding B301. Scheduling precision will be necessary to ensure coordination and escort availability.

Scope of Work.

a. Contractor shall saw-cut and remove existing concrete panels and two bollards as shown on drawing C-101. Save bollards for re-installation.

i. Sawcut for demolition is to be full thickness of the slab.

b. Contractor shall prepare sub-base and compact to 95% proctor density.

c. New concrete shall be 9 inches thick, 4,000 psi, #5 rebar at 18 inches O.C. each way. Use #5 dowels drilled 12 inches deep into existing concrete at 18 inches

O.C. Refer to Detail B/C101 for additional information on paving cross section.

d. Contractor shall install ½” expansion joint around the perimeter of the removed concrete and provide urethane self-leveling joint sealant over sawcuts/control joints and expansion joints.

i. Sawcuts/control joints are to line up to the sawcuts in the adjacent panels that are to remain.

ii. Control joints must be cut.

e. Contractor shall repaint the white stripe in areas of new concrete only. Match width of existing line.

f. Contractor shall re-install two bollards in the same location as existing.

End of Statement

CO

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EXISTING

PAVEMENT

NEW

PAVEMENT

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NORTH

AutoCAD SHX Text OKLAHOMA AIR NATIONAL GUARD - 138th FIGHTER WING

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DEPARTMENT OF THE ARMY AND THE AIR FORCE

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NATIONAL GUARD BUREAU - WASHINGTON,D.C.

AutoCAD SHX Text C101

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AutoCAD SHX Text 1"=20'-0"

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JC

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REVISION:

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DATE:

AutoCAD SHX Text 05/16/2022

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XHZG202001092

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TULSA I.A.P., OKLAHOMA

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BCE: LT COL KURT STEPHENS

AutoCAD SHX Text 138th CIVIL ENGINEER SQUADRON

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OKLAHOMA AIR NATIONAL GUARD TULSA I.A.P. OK.

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DBCE: MAJ PATRICK DEERING

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CONCRETE REPLACEMENT

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SITE PLAN

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BUILDING 301

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REMOVE AND REINSTALL EXISTING BOLLARDS (2)

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1. RESET MOBILE BUILDING ANCHORS IN SAME LOCATION AS RESET MOBILE BUILDING ANCHORS IN SAME LOCATION AS EXISTING.

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NOTES:

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2. NEW 9" THICK 4,000 PSI CONCRETE WITH #5 REBAR AT 18" O.C. EACH WAY. 24" LONG DOWELS AT 18" O.C., 12" DEEP.

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32.72 C.Y.

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3. PAINT WHITE STRIPES IN AREAS OF NEW CONCRETE ONLY. MATCH EXISTING WIDTH.

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T = PAVEMENT THICKNESS

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PAVEMENT JOINT

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OR EDGE

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3" MAX.

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REINFORCE SLABS MARKED "R"

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ON JOINT PLAN WITH BARS AS

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DETAILED FOR PAVEMENT TYPE

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SLAB REINFORCING DETAIL

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NOT TO SCALE

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1/2 DOWEL LENGTH

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T = PAVEMENT THICKNESS

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DRILL AND EPOXY

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GROUT DOWEL

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PAINT AND OIL

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END OF DOWEL

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NOTES:

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THAN THE DOWELS SHALL BE DRILLED IN THE EXISTING

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CONCRETE AND THE DOWELS SHALL BE BONDED IN

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THE DRILLED HOLES USING AN EPOXY RESIN GROUT.

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JOINT SEAL

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1. HOLES APPROXIMATELY 1/8 INCH GREATER IN DIAMETER

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NEW AND EXISTING PAVEMENT

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NOT TO SCALE

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DOWELED JOINT BETWEEN

Tulsa Air National Guard B301 Concrete Replacement

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32 1313-1 CONCRETE PAVING

32 1313-CONCRETE PAVING

PART 1 - GENERAL

1.1 SUMMARY

A. Work performed under this section consists of construction of concrete pavements, over the areas as shown on the Drawings in conformance with the dimensions, lines, grades, thicknesses, and typical sections shown on the Drawings or established by the RPR.

The term “concrete pavements” shall include street and parking lot paving, curb and gutter, sidewalks, driveways, valley gutters and other similar exposed, slab on grade construction.

1.2 DEFINITIONS

A. The following are industry abbreviations not defined elsewhere in this Specification.

1. ASTM: American Society of Testing and Materials

2. AASHTO: American Association of State Highway and Transportation Officials

3. RPR: Resident Project Representative

4. ODOT: Oklahoma Department of Transportation

1.3 ACTION SUBMITTALS

A. Product Data:

1. As Per Division 03 Concrete.

2. Joint Sealing Material.

3. Expansion Joint Filler.

4. Concrete Curing Materials.

B. Construction methods:

1. Method of concrete placement.

2. Materials and Equipment for concrete placement.

PART 2 - PRODUCTS

A. Portland Cement Concrete as per Division 03 Concrete and the information provided on the Drawings. Concrete minimum 28-day compressive strength shall be 4000 psi, unless indicated otherwise on the Drawings.

B. Steel Reinforcement as Per Division 03 Concrete and the information provided on the Drawings.

C. Hot Joint Sealing Compound.

1. Provide a joint sealant that is a homogeneous blend of elastomers and other plasticizers and agents blended to result in a product that seals cracks in pavements from water intrusion.

2. The sealant must retain adhesion and flexibility during extremes of expansion and contraction of the crack through a temperature range of 0ºF to 140ºF. Heat and apply the material according to manufacturer’s recommendations.

a. Bond: When tested at -20ºF to 200% extension of 1/2 inch to 1-1/2 inch for 3 cycles, the material exhibits no cracking, separation, or other opening that at any point is greater than ¼ inch deep in the sealer or between the sealer and the mortar block. A minimum of 2 test specimens in a set of 3 representing a given sample must comply with this requirement.

b. Flow: 5 mm maximum.

c. Resilience: 50 – 80% recovery.

d. Penetration: 0ºF, 150 grams, 5 seconds: 18 - 80

3. Provide material capable of a minimum 12-hour pot life at application temperature and of being re-heatable at least once (in a normal field application)

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32 1313-2 CONCRETE PAVING

without experiencing changes in application characteristics, polymer and oil separation, balling or other signs of gelling.

4. Package the material in pails or boxes clearly marked with recommended pouring temperature, maximum heating temperature, shelf life if appropriate, and batch number. The size of a batch, which is any well-defined quantity produced by essentially the same process during a designated amount or time (such as an 8-hour shift), must be a minimum of 10,000 lbs.

5. Lots from the same manufacturer may be commingled during application. Do not comingle materials from different manufacturers.

D. Cold Applied Chemically Cured Joint Sealant

1. Joint Sealant. Use either Type NS (Non Self-Leveling) or Type SL (Self- Leveling). Provide joint sealants that consist of a cold applied formulation that is selfpriming and compatible with portland cement concrete. The sealants must comply with the applicable test requirements in ASTM D 5893. Acetic acid cure sealants will not be accepted.

2. Backer Rod. Furnish material that is resilient closed or open cell polyethylene foam rod as recommended by the manufacturer of the sealant. Provide a backer rod compatible with the sealant, with no bond or reaction occurring between the rod and the sealant.

E. Preformed Expansion Joint Filler

1. Provide material that complies with AASHTO M 213.

2. Asphalt Expansion Joints shall be composed of asphalt, vegetable fibers, and mineral fillers, formed under heat and pressure between two asphalt-saturated felt liners. Asphalt Expansion Joints shall conform to AASHTO M33 or ASTM D994, shall be 1/2" thick and weigh approximately 3 pounds per square foot, unless shown otherwise on the Drawings.

F. Liquid Membrane Curing Compound

1. Provide liquid membrane forming compound that complies with AASHTO M 148 for Type 1-D, clear or translucent with fugitive dye, or Type 2, white pigmented compound.

2. Type 2 white pigmented compound will be further classified into Type 2 (Wax Based) and Type 2 (Other). This is to allow specifying of wax based compound for certain applications where a bond breaker is desired. Either formulation base may be supplied except when wax based is specified.

3. Do not allow water-emulsion based material to freeze. Material that has been subjected to freezing temperatures will be rejected.

G. Fly Ash as Per Division 03 Concrete, class c and d the maximum substitution of Portland Cement with fly as shall not exceed 15% by weight.

PART 3 - EXECUTION

3.1 GENERAL

A. Concrete pavement shall be constructed to the detailed thicknesses and to the lines and grades shown on the Drawings. Concrete shall be placed over moistened and unfrozen subgrade. The ambient temperature shall be at least 40 deg. F. and rising. If the ambient temperature exceeds 90 deg. F, the RPR has the authority to suspend operations until weather conditions improve. The subgrade shall be free of excessive moisture prior to concrete placement.

3.2 PREPARATION OF THE SUBGRADE

A. Before placing any surfacing material on any section, complete the ditches and drains along that section to effectively drain the surface to be paved.

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32 1313-3 CONCRETE PAVING

B. Trim the base or subgrade to the line, grade and typical cross-section as shown in the Drawings. Maintain the subgrade or base to the as-constructed condition, repairing any encountered defects to the specifications.

C. Maintain the subgrade surface to readily drain at all times. Protect the subgrade from damage when handling materials, tools and equipment. Do not store or stockpile materials on the subgrade.

D. Do not place material or lay pavement on a frozen or muddy subgrade, or when it is raining or snowing.

E. Lightly spray the subgrade or base with water to obtain a thoroughly moistened condition when the concrete is deposited on it. Do not puddle water on the grade.

F. Do not deposit any material until the subgrade or base has been checked and approved by the RPR.

G. Subgrade Preparation shall be of the types and thicknesses as shown on the Drawings.

3.3 PLACING REINFORCEMENT.

A. Place pavement reinforcement at the locations shown in the Drawings. Use a sufficient number of approved metal bar supports or pins to hold all dowel bars and tie bars in proper position as required by the Drawings.

B. Longitudinal joint tie bars and dowel bars may be installed mechanically if approved by the RPR. The satisfactory placement of the bars depends on the ability of the Contractor’s operation to place and maintain the bars in their true position. When satisfactory placement is not obtained by mechanical means, the RPR may require the tie bars and dowel bars be installed ahead of placing the concrete, and that they be securely held in their exact position by staking and tying.

C. Thoroughly coat each dowel with hard grease or other approved bond breaker as shown in the Contract Documents. The bond breaker coating shall not exceed 15 mils ± 5 mils in thickness when averaged over 3 points measured at the ¼ points on the bar at 90º intervals around the bar.

D. When reinforced concrete pavement is placed in 2 layers, strike off the entire width of the bottom layer to such length and depth that the sheet of fabric or bar mat may be laid full length on the concrete in its final position without further manipulation. Place the reinforcement directly on the concrete, then place the top layer of concrete, strike it off and screed it. Remove any portion of the bottom layer of concrete that has been placed more than 30 minutes, and replace it with fresh mixed concrete at the Contractor’s expense. When reinforced concrete is placed in 1 layer, the reinforcement may be positioned in advance of the concrete placement or it may be placed in the plastic concrete after initial spreading, by mechanical or vibratory means.

E. Use reinforcing steel free from detrimental materials that could impair the bond between the steel and concrete.

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32 1313-5 CONCRETE PAVING

A. Equipment

1. Use standard manufacture, slip form paving equipment capable of spreading, consolidating, screeding and float finishing freshly placed concrete in one pass.

Use slip form equipment capable of producing a homogeneous pavement to the specified cross-section, profile and density.

2. Use slip form paving equipment that is automatically controlled (from a reference system) in regard to line and grade.

3. Use slip form paving equipment equipped with traveling side forms. The traveling side forms shall trail behind the paver a sufficient distance to prevent edge slump of the concrete pavement.

4. Use all the component parts recommended by the manufacturer of the slip form paving equipment.

5. If any unit of the paving train shall operate on adjacent pavement, protect the adjacent pavement.

B. Operations

1. Once the paving operation has started, provide adequate equipment and supply of materials to maintain continuous placement for any given working period.

Keep all concrete conveying equipment clean.

2. Do not apply any tractive forces to the slip form paver, except that which is controlled from the machine.

3. Trim to grade the subgrade or surface of the base over which the tracks of the paver will travel. Do not disturb this surface with other equipment. If the equipment or method of operation requires the subbase to be wider than shown in the Drawings, place additional material to provide an adequate surface for the tracks of the paver.

4. Upon completion of the paving operations, remove or repair any base material damaged by the slip form paver’s tracks. All necessary construction and removal of this additional base material is subsidiary to other items of the contract.

5. Operate the paver continuously, stopping only when absolutely necessary. If the forward motion of the paver is stopped, immediately stop the vibrator and tamping elements.

6. Deposit the concrete on the grade in successive batches to minimize re-handling.

Place concrete over and against any joint assemblies so the joint assembly is retained in its correct position. Spread the concrete using approved mechanical spreaders to prevent segregation and separation of the materials.

7. After striking the concrete off with the spreader, leave sufficient concrete in place to allow the final shaping by the use of screeds, templates and pans, depending on make, model and type of machines approved for use in the paving train.

Adjust the paving units to meet the required final cross-section, minimizing the need to carry back concrete to fill voids or depressions. Adjust each screed or template so a uniform roll of concrete extends the full length of the screed or template and allows just enough concrete to pass under the unit to properly feed the next machine. Do not shove large volumes of concrete with the screed or template. Adjust the screed or template to maintain a uniform cross-section.

8. Use multiple spreaders for single and multiple lift operations. Place concrete ahead of the initial spreader strikeoff no more than 30 minutes ahead of the final spreader strikeoff.

9. The use of any paving machine in the paving train is contingent on its ability to finish the pavement satisfactorily to the required grade, section and specified degree of consolidation. The RPR may at any time require the adjustment, repair or replacement of the machine for unsatisfactory performance.

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32 1313-6 CONCRETE PAVING

10. Correct any edge slump of the pavement in excess of ¼ inch, exclusive of edge rounding, before the concrete hardens. Excessive edge slumping will be sufficient reason to discontinue paving until machinery (or mix) is properly adjusted or removed from the project.

11. When the machine finishing has been completed, check the surface with a straightedge a minimum of 10 feet in length before texturing. Operate the straightedge parallel to the pavement centerline, starting at the center and progressing outward. Advance in successive stages of less than ½ the length of the straightedge. At the Contractor’s option, this requirement may be eliminated when smoothness is to be determined by the profilograph.

12. If any unit of the paving train shall operate on adjacent pavement, protect the adjacent pavement.

3.6 CONSOLIDATION AND FINISHING

A. Perform hand spreading with shovels, not rakes. Do not allow workers to walk in the fresh concrete with boots or shoes coated with earth or foreign substance.

B. Do not apply moisture to the surface of the concrete pavement unless the RPR approves the use of additional water on the fresh concrete surface to lubricate the float of the longitudinal finisher. If unusual weather conditions require the addition of superficial water to the concrete surface, apply it only in the form of a fine, fog mist.

C. Consolidate and finish the concrete to the cross-section and elevation shown in the Drawings.

D. Use vibrators or other approved equipment to consolidate each layer of concrete, when placed in more than 1 lift, or full depth if placed in 1 lift. Uniformly vibrate the concrete across the full width and depth of the pavement so that the density of pavement concrete is a minimum of 98% of the vibrated unit weight. The 98% density requirement may be eliminated on miscellaneous areas such as entrance pavement, median pavement and gore areas.

E. Vibrators, either of the surface type (pan or screed) or the immersion type (tube or spud) may be attached to the spreader, paver or finishing machine, or may be mounted on a separate carriage. Only operate the vibrators when the machine they are mounted on is moving forward. Do not operate hand vibrators more than 15 seconds, or less than 5 seconds in any one location unless approved otherwise by the RPR. Place vibrators in and withdraw from concrete vertically in a slow deliberate manner.

F. Additional requirements for vibrators for concrete pavement:

1. The frequency of vibration of surface, pan or screed vibrators shall be a minimum of 3,500 cycles per minute,

2. The frequency of vibration of immersion tube vibrators attached to the paving machine shall be a minimum of 5,000 cycles per minute; and

3. The frequency of vibration of immersion spud vibrators (both hand operated and gang mounted) shall be a minimum of 8,000 cycles per minute.

4. In addition, when epoxy coated reinforcing steel is involved use vibrators with heads of rubber or other resilient material. Rubber covers securely fastened over steel heads shall be acceptable. The requirement does not apply to dowel bars and tie bars for pavement.

G. Maintain a uniform, continuous roll of concrete over the vibrators ahead of the strike-off.

The height of the roll shall be approximately the same height as the thickness of the pavement being vibrated.

H. In order to obtain concrete consolidation in the vicinity of joint assemblies, the RPR may require that these areas be hand vibrated with an immersion spud vibrator.

I. On projects or areas within projects where the use of conventional equipment is impracticable, other consolidation and finishing equipment may be used with approval of the RPR.

3.7 TEXTURING

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32 1313-7 CONCRETE PAVING

A. Provide a transverse or longitudinal tined finish where shown in the Drawings.

1. Use a burlap drag as soon as all excess moisture has disappeared and while the concrete is still plastic enough to make a granular surface possible.

2. Following the dragging operation, make a final finish or texture of the surface of the plastic pavement with grooving equipment with a metal comb that is capable of producing a uniform pattern of longitudinal grooves approximately 3/16 inch wide, spaced at ¾ inch centers and ⅛ to ¼ inch deep. Perform the operation at such time to minimize displacement of larger aggregate particles and before the surface permanently sets.

B. Unless otherwise noted in the Drawings, parking lot pavement, curb and gutters, sidewalks, driveways, valley gutters and other similar exposed, slab on grade construction shall receive a light broom finish.

C. Before final texturing, finish the exposed edge of the pavement to a radius of ¼ inch with an edger. Edge the interior longitudinal joints on multiple-lane pavement to a radius of ⅛ inch. Eliminate any tool marks appearing on the slab adjacent to the joints or edge of the slab. Do not disturb the rounding of the corner of the slab.

3.8 JOINTS

A. General:

1. Construct joints according to the Drawings. Failure to construct the joints in the best possible manner will be cause for suspension of work until the cause of the defective work is remedied.

2. If existing pavement of any type is required to abut with the new pavement, and the termination of the removal is not at an existing joint, make the new joint by sawing the existing pavement full depth with a diamond saw before removal.

3. The objective is to create or form a plane of weakness in the fresh concrete before uncontrolled or erratic cracking occurs. The following methods are acceptable:

a. Use concrete saws to saw all contraction joints no wider than the initial saw cut and to a depth of D/3 ± ¼ inch. Extreme conditions could exist which make it impracticable to prevent erratic cracking by sawing the joints early. At the onset of the project, devise methods, with the approval of the RPR, to control this cracking.

b. Make a “plastic concrete cut” straight and well defined so it can be sawed out by the saw crew. The “plastic concrete cut” would replace the specified initial saw cut. Suggested procedures could be the use of a stiff metal parting strip, with or without handles that would be gently inserted in the fresh concrete and removed, thereby parting the interlocking coarse aggregate and providing a plane of weakness.

c. Cut the fresh concrete with a mason’s trowel and straightedge from a worker’s bridge. It is imperative that the “plastic concrete cut” joint and the second stage saw cut are in the same exact location.

d. At the Contractor’s option, “early entry” saws may be used based on satisfactory performance and depth of cut recommended by the equipment manufacturer.

e. Procedures to control erratic cracking are not limited to these examples.

4. Edge any transverse joint requiring hand finishing and edging with a tool having a radius of ⅛ inch. Do not indent the surface of the pavement with the horizontal face of the edger.

B. Contraction Joints.

1. Install contraction joints of the type, dimensions and spacing shown in the Drawings.

2. Dowel Joints.

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32 1313-8 CONCRETE PAVING

a. Stretch a stringline along the centerline of the joint, or otherwise adequately mark it to assure dowel bar joint assembly alignment.

b. Install the dowel bar joint assembly so the centerline of the assembly is perpendicular to the centerline of the slab, and the dowels lie parallel to the slab surface and slab centerline. Place concrete so it will not displace or disarrange the joint assembly. Mark the location of contraction joints to assure the joints are sawed in the proper location.

C. Longitudinal Joints.

1. Construct longitudinal joints according to the Drawings. When sawed joints are specified or used, provide approved guide lines or devices to cut the longitudinal joint on the true line as shown in the Drawings. Perform the sawing of longitudinal joints at a time that will prevent erratic or uncontrolled cracking.

When “plastic concrete cut” methods are used, no sawing or widening of the joint will be required to make a sealant reservoir.

D. Construction Joints.

1. Make a butt construction joint perpendicular to the centerline of the pavement at the close of each day’s work, or when the process of depositing concrete is stopped for a length of time sufficient for the concrete to take its initial set. Form this joint by using a clean header having a nominal thickness of 2 inches, and minimum cross-sectional area equal to pavement thickness by pavement width.

Cut the header true to the crown of the finished pavement. Accurately set and hold it in place in a plane at right angles to centerline and perpendicular to the surface of the pavement.

2. Protect the top surface of the header with steel. Securely fasten a trapezoidal piece of metal or wood approximately 2 inches wide and a minimum of 1 inch in depth on the face of the header, along the center of the header to form a grooved or keyed joint.

3. With approval of the RPR, the Contractor may pave beyond the joint location a distance to maintain the line and grade. Saw the construction joint when the concrete has hardened. Drill holes for reinforcing tie bars and epoxy the bars in-place. Place fresh concrete against the previously placed concrete taking care to avoid injury to the edge. Vibrate the concrete to obtain an interlocking joint and prevent a honeycombed face of the joint. The additional concrete, removal of debris and other work created by this alternative is at the Contractor’s expense.

4. Unless shown otherwise in the Drawings, do not place any construction joint within 5 feet of an expansion, contraction or other construction joint.

E. Isolation (Expansion) Joint Construction

1. Isolation joints shall be formed around fixed objects, structures, walks and where indicated in the Drawings.

F. Special Joint Construction.

1. Construct special joints as shown in the Drawings or as ordered by the RPR around drainage, utility and other structures located within the concrete pavement boundaries. Hold temporary forms securely in place during the concrete placement operation.

G. Joint Construction.

1. Construct all joints as shown in the Drawings. Repair or replace any curing medium damaged during joint construction. Construct joints as follows:

a. Induced Plane of Weakness. The first saw cut is a relief cut at the proper joint location, approximately ⅛ inch wide and to the full joint depth as shown in the Drawings (D/3 ± ¼ inch). Make the relief cut as soon as the concrete has hardened enough so that no excess raveling or spalling occurs, but before any random cracks develop. The sequence of the relief sawing is at the Contractor’s option, provided all relief sawing is

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32 1313-9 CONCRETE PAVING

completed before random cracking develops. Use suitable guide lines or devices to cut the joint straight and in the correct location. Repair curing membrane damaged during sawing as directed by the RPR. Alternate methods to the first stage sawing as specified in this Section may also be used.

b. Reservoir Construction. Do not perform widening of the relief joints to full width until the concrete is a minimum of 48 hours old. Delay it longer if the sawing causes raveling of the concrete. If second stage sawing is performed before completion of the curing period, maintain the cure by use of curing tapes, plastic devices or other materials approved by the RPR. Center the joint groove over the relief cut, and saw it to the dimensions shown in the Drawings. Should any spalling of the sawed edges occur that would detrimentally affect the joint seal, patch it with an approved epoxy patching compound and allow it to harden before installing the joint material. Make each patch true to the intended neat lines of the finished cut joint.

H. Cleaning Joints.

1. Immediately clean freshly cut sawed joints by flushing with a jet of water under pressure and other necessary tools to remove the resulting slurry from the joint and immediate area.

2. To clean the joints, use air compressors equipped with suitable traps capable of removing all surplus water and oil from the compressed air. When contaminated air is found to exist, work will be stopped until suitable adjustments are made, and the air stream is found to be free of contaminants.

3. Just before applying the hot or cold joint sealant, complete a final cleaning by air blasting to clean incompressibles from the joint.

I. Sealing Joints.

1. The joint location, size and configuration is shown in the Drawings. Use applicable materials to obtain the required joint sealant configuration. Seal longitudinal pavement joints full depth with either a cold applied chemically cured joint sealant or a hot joint sealing compound. Use only 1 type of longitudinal joint sealant on a project, unless otherwise approved by the RPR. Seal joints before opening to traffic.

2. Cold Applied Chemically Cured Joint Sealants.

a. Do not seal joints until they are clean and dry, and the pavement has attained the age recommended by the manufacturer of the sealant. Do not apply sealant to damp concrete, or install it during inclement weather.

Place the sealer full depth in close conformity with dimensions shown in the Drawings. Any deviation will be cause for rejection of the joint until satisfactory corrective measures are taken. Do not apply joint sealant when the ambient air temperature is below 40ºF, or as specified by the manufacturer.

b. Apply the joint sealant by an approved mechanical device. Any failure of the joint material in either adhesion or cohesion will be cause for rejection. Repair the joint to the RPR’s satisfaction.

c. Some cold applied, chemically cured sealants are not self-leveling and will not position properly in the joint under its own weight. Tool the sealant surface as shown in the Drawings. Accomplish tooling before a skin forms on the surface. The use of soap or oil as a tooling aid is prohibited.

d. After a joint has been sealed, promptly remove all surplus joint sealer from the pavement or structure surfaces.

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32 1313-10 CONCRETE PAVING

e. Do not permit traffic over sealed joints until the sealer is tack free, or until debris from traffic cannot imbed into the sealant.

3. Hot Applied Joint Sealing Compound.

a. Do not seal joints until they are clean and dry, and the pavement has attained the age recommended by the manufacturer of the joint sealing compound. Install joint sealing compound according to the manufacture’s recommendations.

b. Completely clean out the application unit when changing brands of materials, or if the material exhibits any sign of changes in application characteristics, polymer or oil separation, balling or any signs of jelling. If the application unit contains compatible material from a previous project at start-up, provide the RPR a certification covering the material in the application unit, including the manufacturer, type, etc. Material that cannot be identified and certified shall be completely cleaned out before start-up.

c. After a joint has been sealed, promptly remove all surplus joint sealer from the pavement or structure surfaces.

d. Do not permit traffic over sealed joints until the sealer is tack free, or until debris from traffic cannot imbed into the sealant.

3.9 PROTECTION AND CURING OF CONCRETE

A. Cure the pavement by using burlap, liquid membrane-forming compounds, white polyethylene sheeting, concrete curing blankets or reinforced white polyethylene sheeting. Failure to provide proper curing is cause for immediate suspension of the concreting operations.

B. Burlap, Concrete Curing Blankets, White Polyethylene Sheeting and Reinforced White Polyethylene Sheeting.

1. Place the curing material on the pavement immediately after the pavement has been finished, and the concrete has hardened sufficiently to avoid harmful marring of the surface, yet early enough to prevent undue loss of moisture from the concrete. If the pavement becomes dry before the curing material is placed, moisten the concrete with a fine spray of water. Place burlap-polyethylene blankets with the dampened burlap side down. Dampen burlap and place on the surface. Keep burlap damp throughout the entire curing period.

2. Lap adjacent units of curing materials approximately 18 inches. Upon removal of the forms, extend the material to completely cover the full depth of the exposed pavement.

3. Weight the curing material down using continuous windrows of earth placed along the sides and edges of the pavement and transversely across the pavement on the laps to cause the material to remain in contact with the covered surface throughout the curing period. Other methods may be used with approval of the RPR.

4. Walking on the pavement surface to place the curing material is prohibited.

Walking on the curing material is prohibited until the pavement has cured sufficiently to prevent damage to the surface.

5. Leave the curing material in place for a minimum of 4 days, unless otherwise directed by the RPR. Immediately repair any tears or holes appearing in the material during the curing period, or replace it with material in good condition.

6. The material may be reused, provided it is kept serviceable by proper repairs, and if in the judgment of RPR it will provide water retention during the curing period.

C. Liquid Membrane-Forming Compounds.

1. After finishing operations have been completed and immediately after the free water has left the surface, completely coat and seal the surface of the slab with a

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32 1313-11 CONCRETE PAVING

uniform layer of white membrane curing compound. Apply the compound in 1 application at a minimum rate of 1 gallon per 150 square feet of surface.

Thoroughly mix the curing compound at all times during usage. Do not dilute the white membrane curing compound.

2. Protect the treated surface from injury a minimum of 4 days, unless otherwise directed by the RPR. If the newly coated film is damaged in any way, apply a new coat of material to the affected areas equal in coverage to that specified for the original coat. A minimum of foot traffic will be permitted on the dried film as necessary to properly carry on the work, provided any damage to the film is immediately repaired by application of an additional coat of compound.

3. Immediately after the forms are removed (fixed form and slip form), coat the entire area of the sides of the slab with white membrane curing compound at the rate specified for the pavement surface, regardless of whether or not further concrete placement will be made against the pavement edge. Approved hand spray equipment will be permitted only for the application of curing compound on the sides of the slab, for repairing damaged areas and for hand finished areas.

Repair any damaged areas caused by joint sawing.

3.10 OPENING TO TRAFFIC

A. No motorized traffic is allowed on the pavement until all of the following conditions are met.

1. Construction Traffic Only.

a. The flexural strength of the pavement shall meet or exceed 450 psi.

Determine the flexural strength of the pavement by testing flexural strength specimens utilizing the third point loading method, or by use of a calibrated maturity meter.

b. If testing is not done, observe a 4 day curing period before allowing motorized traffic on the pavement.

c. Provide protection to keep foreign material out of the unsealed joints by an approved method.

2. All Traffic.

a. In addition to requirements for Construction Traffic Only given above, the joints shall be sealed according to this Section.

b. The pavement surface shall be swept and/or washed down to remove all dirt, debris or foreign materials prior to opening to traffic

3. The Contractor may, at own expense, increase the cement content from the minimum as per Division 03 Concrete to accelerate the strength gain of the Portland Cement Concrete Pavement.

3.11 COLD WEATHER CURING.

A. Maintain the concrete pavement at a minimum temperature of 40ºF, as measured along the surface of the concrete, for a minimum of 4 days after placing. When the ambient air temperature is expected to drop below 35ºF, anytime during the curing period, take precautions to maintain the concrete temperature. Keep a sufficient supply of approved moisture barrier material, other than liquid curing compound, and suitable blanketing material, such as straw, hay and burlap close by. Be prepared to cover the pavement with a moisture barrier and protect all pavement less than 4 days old with blanketing material. Remove, dispose of and replace concrete damaged by cold weather, as determined by the RPR.

3.12 QUALITY CONTROL.

A. Field testing and sampling of materials shall conform to the requirements of Division 03 Concrete.

B. Laboratory testing of materials shall conform to the requirements of Division 03 Concrete

C. Correction of deficient materials shall conform to the requirements of Division 03 Concrete.

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32 1313-12 CONCRETE PAVING

END OF SECTION

3.13 AIR CONTENT.

Determine air content in accordance with ASTM C173/C173M or ASTM C231/C231M. ASTM C231/C231M shall be used with concretes and mortars made with relatively dense natural aggregates. Two tests for air content shall be made on randomly selected batches of each class of concrete placed during each shift. Additional tests shall be made when excessive variation in concrete workability is reported by the placing foreman or the Government inspector. If results are out of tolerance, the placing foreman shall be notified and he shall take appropriate action to have the air content corrected at the plant. Additional tests for air content will be performed on each truckload of material until such time as the air content is within the tolerance specified.

3.14 SLUMP TEST.

Two slump tests shall be made on randomly selected batches of each class of concrete for every 250 cubic yards, or fraction thereof, of concrete placed during each shift. Additional tests shall be performed when excessive variation in the workability of the concrete is noted or when excessive crumbling or slumping is noted along the edges of slip-formed concrete.

PROJECT NO.

XHZG202001092

APPROVED DISAPPROVED

Submittal Schedule - AF Form 66

2 Transfer and Acceptance of DOD Real Property - DD Form 1354

3 Contractor Hazardous Material Identification

4 Solid Waste Recycling and Disposal Reporting Form

Affirmative Procurement Reporting Form

DD Form 1354

Construction Schedule

8 Construction Photos Construction Installation Shop Drawings

Safety Documentation as stated

Schedule of Test and Inspections

Quality Control Plan

Warranties

13 Concrete mix design

14 Joint sealant

15 Steel

16 Expansion Material

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SCHEDULE OF MATERIAL SUBMITTALS

(AF Form 66 Modified)

PROJECT TITLE SOLICITATION/CONTRACT NO.

Building 301 Concrete Replacement

TO BE COMPLETED BY PROJECT ENGINEER

NO. OF COPIES REQUIRED

1.2.2 Sprinkler Coverage

2.13 DOUBLE-CHECK VALVE BACKFLOW PREVENTION ASSEMBLY