Specifications 3.29.21_0002.pdf

Minuteman Missile National Historic Site

Philip, South Dakota 57767

Replace Concrete Around Delta-09 Vault Toilet

PMIS 310627

PROJECT SPECIFICATIONS

NATIONAL PARK SERVICE

01/25/2021 - REVISED

SECTION 01 10 00 GENERAL REQUIREMENTS 1

TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

Section 01 10 00 - Division 01 Short Form General Requirements

DIVISION 03 – Concrete

Section 32 13 13 Concrete Paving

DRAWINGS and PHOTOGRAPHS

REQUIRED SUBMITTALS

SECTION 01 10 00 GENERAL REQUIREMENTS 2

SECTION 01 10 00

DIVISION 1 SHORT FORM GENERAL REQUIREMENTS

PART 1 – GENERAL

ITEM 1 - DESCRIPTION OF WORK

1.1 Background: Concrete around the Delta-09 Launch Facility Parking Lot’s Vault Toilet has heaved causing tripping hazards and problems closing the exterior doors on the vault toilet building. Project would remove existing concrete around vault toilet building to the asphalt parking lot and install new concrete.

1.2 Work Covered by the Contract Documents:

A. Project Location: Minuteman Missile National Historic Site, Delta-09 Launch Facility Parking Lot, 195th Avenue, Exit 116 off Interstate 90, Wall, SD 57790.

B. Work consists of: Project would remove 1,084.6 square feet of concrete walkway. Remove soil to a depth of 16 inches around the structure and asphalt edge. Place 12 inches of 3/4 inch minus red limestone aggregate approximately 49 tons around vault toilet area. Compact red limestone aggregate to 99% compaction. Install #4 epoxy coated rebar, dowel into existing concrete sidewalk and vault toilet concrete. Seal #4 epoxy coated rebar dowels holes with urethane caulking. Install forms, #4 epoxy coated rebar 12 inches on center, place plastic rebar chairs under rebar. Place approximately 12.61 cubic yards of concrete. Pre-finish by screeding and floating concrete. Finish surface with broom. Apply concrete cure. Use hand tool or power saw for cutting expansion joints and seal with self-leveling polyurethane sealant.

C. All work will be performed under a single contract.

D. Period of performance: Work shall be completed within approximately 30 calendar days of contract award. 5 days for shop drawings and material delivery and 20 days on site to substantial completion, 5 days for final completion.

ITEM 2 - EXISTING UTILITIES

2.1 Existing Utilities: Notify Contracting Officer and utility companies of proposed locations and times for excavation.

2.2 Contractor shall be responsible for locating and preventing damage to known utilities. If damage occurs, repair utility at no additional expense to the Government. If damage occurs to an unknown utility, repair utility. An equitable adjustment will be made in accordance with the Changes clause of the contract.

2.3 No potable or commercial water on site.

2.4 Existing Utility Interruptions: Do not interrupt utilities serving facilities occupied by Government or others unless permitted under the following conditions and then only after arranging to provide temporary utility services according to requirements indicated:

2.4.1 Notify Contracting Officer not less than two days in advance of proposed utility

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interruptions.

2.4.2 Hours for Utility Shutdowns: Shutdowns shall not exceed 2 to 3 hours. Temporary provisions will be needed by the Contractor for periods longer than stated allowance.

ITEM 3 - CONTRACTOR’S USE OF PREMISES

3.1 Conduct of Operations: At all times the contractor shall conduct his operations in conformance with the rules and regulations promulgated by the Secretary of the Interior for the National Park Service, and applicable park rules and regulations prescribed by the Park Superintendent.

https://www.nps.gov/mimi/learn/management/superintendents_compendium.htm

A. No signs or advertisements (except those specified herein) shall be displayed on the construction site or within the park unless approved by the Contracting Officer.

B. Smoking is not permitted within any Federal building or within 25 feet of entrances, operable windows, or outdoor air intakes.

C. Public Use of Site: Contractor shall at all times conduct operations to ensure the least inconvenience to the public. Construction area needs blocked off with temporary barricade fencing during work for protection of work site.

3.2 On-site work hours: Work shall be generally performed during normal business working hours of 7 a.m. to 3:00 p.m., Monday through Friday, except when otherwise indicated.

A. Work on Saturdays, Sundays, Federal holidays, early morning, or at night may not be performed without prior consent from the Contracting Officer. Submit requests for work outside of the stated normal business hours to the Contracting Officer for approval at least 48 hours in advance of the work.

3.3 Contractor Use of Site:

A. General: Contractor shall have limited use of the site for construction operations. Limit use of premises to area around vault toilet. Do not disturb portions of project site beyond areas in which the work is indicated.

B. Limits: 10 feet around building.

C. Driveways and Entrances: Keep driveways, access roads, and entrances serving premises clear and available to Government, Government's employees, and emergency vehicles at all times. Do not use these areas for parking or storage of materials. Schedule deliveries to minimize use of driveways and entrances.

D. Limit site disturbance, including earthwork and clearing of vegetation, to:

a. 10 feet beyond building perimeter

b. All disturbed areas will be returned to pre-existing site conditions.

c. All damaged areas from wheel ruts will have ruts filled in with approved topsoil.

E. Security and Protection facilities installation:

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1. Environmental Protection: Provide protection, operate temporary facilities, and conduct construction in ways and by methods that comply with environmental regulations and that minimize possible air, waterway, and subsoil contamination or pollution or other undesirable effects.

1. Cleaning of Equipment: The Contractor shall ensure that prior to moving on to the Project Area, all equipment, is free of soil, seeds, vegetative matter, or other debris that could contain or hold seeds. Ensure that all equipment has been pressure washed and is free of exotic species prior to start-up of operations and moving of equipment to Project Area. Equipment shall be considered free of soil, seeds, and other debris when a visual inspection does not disclose such material. Disassembly of equipment components or specialized inspection tools are not required.

2. Pest Control: Follow NPS requirements and practices to minimize attraction and harboring of rodents, roaches, and other pests and to perform extermination and control procedures at regular intervals so Project will be free of pests and their residues at Substantial Completion.

Perform control operations lawfully, using environmentally safe materials.

3. Security Enclosure and Lockup: Install substantial temporary enclosure around partially completed areas of construction (Snow Fence).

3.4 Storage - Staging Areas:

A. Confine Storage of materials and equipment to the project area of Delta-09 Parking Lot.

3.5 Preservation of Natural Features: Protect existing vegetation from over excavation.

3.6 Hauling Restrictions: Follow South Dakota State and Pennington County road requirements for all park work/access.

3.7 Housekeeping:

A. Keep project neat, orderly, and in a safe condition at all times. Store and use equipment, tools, and materials in a manner that does not present a hazard. Immediately remove all hazardous rubbish. Do not allow rubbish to accumulate. Provide onsite containers for collection of rubbish and dispose of it daily during progress of work.

B. Dispose of waste materials legally using approved landfills or disposal companies.

C. Address Recycling: Concrete can be hauled to the City of Wall rubble area if approved.

Contact Wall Public Works Director at 605-515-1771 for further information.

3.8 Occupancy Requirements for Buildings:

A. Existing Buildings:

1. Park Visitor Occupancy: Delta-09 Vault Toilet will be utilized during and maintained while area is under construction during the entire contract period. Cooperate with Government during construction operations to minimize conflicts and facilitate park visitor and Government usage. Perform the Work so as not to interfere with Government's day-to-day operations. Maintain existing exits, unless otherwise indicated.

a. Maintain access to existing walkways, corridors, and other adjacent occupied or used facilities. Do not close or obstruct walkways, corridors, or other occupied or used facilities without written permission from the COR.

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b. Repair damage caused by construction operations. Protect building during construction period.

3.9 Photo Documentation:

All photos shall be in focus, show maximum range of depth of field general photo and then close up detail photo as needed. Submit photo documentation electronically within 7 days or as approved by COR.

A. Existing Condition Images: Before starting construction, take color, dated, digital images of project site and adjacent property/roads/etc. that may be impacted by construction activity/traffic.

Include existing items to remain or be salvaged from different vantage points and with context for location identification.

B. Construction Images:

1. Document all sub-surface work/ trenches etc. prior to backfill with enough overall field view to show location and then details.

2. Maintain organized index for photos with date, description, etc..

3. Additional images as needed when questions or emergency situations occur. Submit within 24 hours.

3.10 Fire and Life Safety:

As a minimum, conduct one weekly 15-minute "toolbox" safety meetings. These meetings shall be conducted by a foreman or supervisor and attended by all construction personnel at the worksite. Topics need to coincide with work scheduled for the following week. Document and submit meeting minutes to the Contracting Officer within one day after the meeting.

A. Comply with the requirements of NFPA 241 (Standard for Safeguarding Construction, Alteration, and Demolition Operations).

B. Store and handle hazardous materials in accordance with manufacturer’s and OSHA 29CFR1926 Subpart D requirements. Maintain readily available, on site, MSDS/Safety Data Sheets (SDS) for each chemical.

i. Immediately report all spills of hazardous materials to the park.

ii. Maintain a spill emergency response kit.

iii. Train employees how to respond to a spill and use the emergency response kit.

3.11 Noise and Acoustics Management:

A. Noise Control: Perform demolition and re-roof operations to minimize noise. Perform noise-producing work in less sensitive hours of the day or week as directed by the Contracting Officer.

B. Repetitive and/or intermittent, high-level noise: Permitted only during Daytime.

1. Do not exceed the following dB(A) limitations at 50 feet:

Sound Level in dB(A) Time Duration of Impact Noise 70 More than 12 minutes in any hour 80 More than 3 minutes in any hour

2. Maximum permissible construction equipment noise levels at 50 feet:

SECTION 01 10 00 GENERAL REQUIREMENTS 6

EARTHMOVING dB(A) MATERIALS HANDLING dB(A) Compressors 75 Pneumatic Tools 80 Pumps 75 Saws 75 Generators 75 Vibrators 75

C. Ambient Noise:

1. Maximum noise levels (dB) for receiving noise area at property line shall be as follows:

a. Residential receiving area :

Daytime: 65 dB Nighttime: 45 dB

b. Commercial/Industrial receiving area:

Daytime: 67 dB Nighttime: 65 dB

ITEM 4 - COMMENCEMENT, PROSECUTION, AND COMPLETION

4.1 The Contractor shall commence work in accordance with the terms and conditions of the contract.

ITEM 5 - EXAMINATION OF THE SITE

5.1 All bidders are urged to visit the job site and examine existing conditions before submitting bids. All bidders will be held to have the same knowledge concerning the site and the on-ground conditions as if they had inspected the job site. No change orders will be approved for work obvious during a site visit.

Please see FAR 52.236-27 - Site Visit (Construction).

ITEM 6 - ABBREVIATIONS

6.1 The list of abbreviations, which may be used in the Construction Specifications or Special Provisions, refer to the organizations and specifications of the organizations may be found at the below https://www.nps.gov/orgs/1671/do-business-with-us.htm

ITEM 7 - ACCIDENT PREVENTION

7.1 Description: The work of this section consists of establishing and implementing an effective accident prevention program and providing a safe environment for all personnel and visitors.

A. It is the Contractor's responsibility to require all those working on or visiting the site to wear hard hats and other necessary personal protective equipment in good repair at all times. As a minimum, maintain four hard hats and all other APP required equipment.

7.2 Submittals:

A. Accident Prevention Program: At the preconstruction conference submit for approval an accident prevention program. The program shall include:

1. Name of responsible supervisor to carry out the program

2. First aid procedures

3. Training, both initial and continuing

4. Planning for possible emergency situations

5. Contractor to identify nearest location of medical facility for emergencies https://www.nps.gov/orgs/1671/do-business-with-us.htm

SECTION 01 10 00 GENERAL REQUIREMENTS 7

6. Recognition that work will be performed in remote areas with limited communication or cell phone coverage

B. Meeting and Inspection Reports: Safety Meetings: As a minimum, conduct 15 minute

"toolbox" safety meetings. These meetings shall be conducted by a foreman and attended by all construction personnel at the worksite. Submit a report of safety meetings and inspections.

7.3 Qualification of Employees:

A. Ensure that employees are physically qualified to perform their assigned duties in a safe manner to include operators of vehicles and equipment. .Provide operating instructions for all equipment. .

B. Do not allow employees to work whose ability or alertness is impaired because of drugs, fatigue, illness, intoxication, or other conditions that may expose themselves or others to injury.

7.4 Accident Reporting: The Contractor shall report all accidents to the Contracting Officer or designee as soon as possible and assist the Contracting Officer and other officials as required in the investigation of the accident.

7.5 First Aid Facilities: Provide adequate facilities for the number of employees and the type of construction at the site.

7.6 Emergency Instructions: Post telephone numbers and reporting instructions for ambulance, physician, hospital, fire department, and police in conspicuous locations at the work site.

7.7 Protective Equipment: It is the Contractor's responsibility to require all those working on or visiting the site to wear necessary protective equipment at all times.

7.8 Hazardous Materials: It shall be the responsibility of all operators and contractors, functioning within the park to properly cleanup, mitigate and remediate if necessary, all unauthorized discharges of hazardous materials or non-hazardous chemical and biological products released from fleet and/or other support vehicles or stationary sources. Response shall be consistent with guidelines established by federal, state and local regulations, and as outlined within the operator's Safety or Hazardous Materials Business Plan.

A. If a spill, leak or other release occurs, the operator shall as soon as possible, without impeding cleanup, notify the National Park Service Emergency Dispatch.

ITEM 8 - PRECONSTRUCTION CONFERENCE: See FAR 52.236-26

ITEM 9 - SUBMITTALS

9.1 General Submittal Procedures:

A. General: Prepare and submit submittals required by individual Specification Sections. Types of submittals are indicated in individual specific sections.

1. CM-16 Transmittal Form: All submittals shall be transmitted via electronic email using

National Park Service form CM-16 form. The form will be provided by the Contracting

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Officer. No action will be taken on a submittal item unless accompanied by the CM-16 transmittal form. Submitted to COR.

B. Submittal List: A submittal list has been attached to the end of this Specification Section. The intent is to provide an overall summary of submittal requirements and not a comprehensive list. The requirements of the individual Specification Sections, terms and conditions of the Contract still apply regardless of what is shown on the submittal list.

C. Preconstruction Conference Submittal: The following items shall be submitted a minimum of one week prior to the Preconstruction Conference. If all of these documents have not been received one week prior to the scheduled Pre-Construction Conference date, the conference will be cancelled, Notice to Proceed will not be issued, and the Contracting Officer will consider other contractual remedies. Work shall not commence until written Notice to Proceed has been issued. Contracting Officer will notify Contractor of tentative date for the Pre- Construction Conference:

1. Letter designating Project Superintendent.

2. Construction Schedule.

3. A comprehensive breakdown of the Schedule of Values.

4. Accident Prevention Plan (see section 7 of this document).

5. A list of Subcontractors for this project.

6. Written statements from subcontractors certifying compliance with applicable labor standard clauses (SF1413).

7. Satisfactory evidence of liability insurance coverage and workman’s compensation for the

Contactor and all subcontractors.

8. Waste Management Plan.

9.2 Shop Drawings, Product Data, and Samples: Contracting Officer will provide sample cover sheet.

A. Shop Drawings: Installation details.

B. Product Data: Provide component construction, anchorage method, hardware, etc.

C. For submittals specified above, forward submittals to Contracting Officer Representative (COR) at least 15 days before need for approval.

D. After approving submittals, Contracting Officer will return one copy to the Contractor. If submittals are not approved, Contracting Officer will return all copies to Contractor with reasons for rejection. Resubmit, identifying changes. Any work done before approval shall be at Contractor's own risk.

9.3 Approved Equals: Refer to FAR 52.211-6 - If an item in this solicitation is identified as “brand name or equal” or lists more than 3 manufacturers, the purchase description reflects the characteristics and level of quality that will satisfy the Government’s needs. The salient physical, functional, or performance characteristics that “equal” products must meet are specified in the solicitation or relevant specification.

A. For each item proposed as an “approved equal,” submit supporting data, including:

1. Drawings and samples as appropriate.

2. Comparison of the characteristics of the proposed item with that specified.

3. Changes required in other elements of the work because of the substitution.

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4. Name, address, and telephone number of vendor.

5. Manufacturer’s literature regarding installation, operation, and maintenance, including schematics for electrical and hydraulic systems, lubrication requirements, and parts lists. Describe availability of maintenance service, and state source of replacement materials.

B. A request for approval constitutes a representation that Contractor:

1. Has investigated the proposed item and determined that it is equal or superior in all respects to that specified.

2. Will provide the same warranties for the proposed item as for the item specified.

3. Has determined that the proposed item is compatible with interfacing items.

4. Will coordinate the installation of an approved item and make all changes required in other elements of the work because of the substitution.

5. Waives all claims for additional expenses that may be incurred as a result of the substitution.

C. Approved Equals will be evaluated and approved/disapproved during the submittal process.

9.4 Progress Schedules: As soon as possible after Notice of Award and before beginning any work, submit Progress Schedule. Contracting Officer will review the Progress Schedule for format and content.

Submit two copies of Progress Schedule (normally in bar chart form) showing estimated starting and completion dates for each part of the work. The first progress payment will not be issued until an acceptable progress schedule is submitted. The following information must accompany submission of progress schedules prior to processing any pay application:

A. Daily/weekly progress reports during construction as part of the administration process.

B. Schedule of Values: Breakdown each lump-sum item into component work activities used in the schedule, for which progress payments may be requested. The Schedule of Values will form the basis for payment. The work activities broken out within the schedule of values shall be integrated into and made a logical part of the construction baseline schedule submitted under this specification. The total costs for the component work activities shall equal the contract price for that lump-sum item. The Contracting Officer may request data to verify accuracy of dollar values.

A sample Schedule of Values will be provided by the Contracting Officer.

ITEM 10 – TEMPORARY SERVICES

10.1 Description: The work of this section consists of providing temporary services required for Contractor's performance of the work of this Contract.

10.2 Fire Prevention and Protection:

A. Hazard Control: Take all necessary precautions to prevent fire during construction. Provide adequate ventilation during use of volatile or noxious substances.

ITEM 11 - PROJECT CLOSEOUT

11.1 Description: The work of this section consists of final cleanup, closeout submittals, final inspection procedures, and safety precautions.

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11.2 Cleaning: Remove all tools, equipment, surplus materials, and rubbish. At time of final inspection, project shall be thoroughly clean and ready for use.

11.3 Substantial Completion and Final Inspection: Submit written certification that project is substantially complete, and a final inspection must be requested to the Contracting Officer in writing. The Contracting Officer or designee will make an inspection within 10 days of receipt of request or at a mutually agreeable time.

A. If the work is determined to be substantially complete, following the final inspection, the.

Contracting Officer will prepare a Punch List and issue a Letter of Substantial Completion.

B. If the work is not determined to be substantially complete following the final inspection, the

Contracting Officer will notify Contractor in writing. Contractor shall request a new final inspection after completing the work. Re-inspection costs may be charged against the Contractor in accordance with the Inspection of Construction contract clause.

C. Contractor shall complete the Punch List within 10 calendar days, documented weather permitting.

D. If Contracting Officer determines that the work is not substantially complete; he will immediately notify Contractor in writing, stating reasons. After completing work, Contractor shall resubmit certification and request a new final inspection. Re-inspection costs may be charged against the Contractor in accordance with the Inspection of Construction contract clause.

E. If Contractor completes all items of work on the Punch List and all contractually required items, Contracting Officer will issue Letter of final acceptance of work.

F. If the Contractor fails to complete the work within the time frame, the Contracting Officer may correct the work with an appropriate reduction in contract price or charge for re-inspection costs in accordance with the Inspection of Construction contract clause.

G. Disposition of any permits and warranties required by the specifications in this section.

11.4 Acceptance of the Work: After all deficiencies have been corrected, a Letter of Acceptance will be issued. A Release of Claims document must be executed and submitted to the Contracting Officer before final payment can occur.

11.5 Warranties

A. Construction Warranty shall be based on date of Substantial Completion.

B. Provide All Warranty information of products installed organized by Division. All contact information, extents and conditions shall be clearly noted as well as date of overall project Substantial Completion.

C. Information shall include operation and maintenance manuals for each warranted material.

PART 2 – PRODUCTS (NOT USED)

SECTION 01 10 00 GENERAL REQUIREMENTS 11

PART 3 – EXCUTION (NOT USED)

END OF SECTION

SECTION 32 13 13 CONCRETE PAVING 1

SECTION 321313

PART 2 - CONCRETE PAVING

PART 3 - GENERAL

3.1 SCOPE OF WORK

3.2 SUMMARY

A. Section Includes Concrete Paving, Including the Following:

1. Walks.

3.3 PREINSTALLATION MEETINGS

A. Preinstallation Conference: Conduct conference at Project site.

1. Review methods and procedures related to concrete paving, including but not limited to, the following:

a. Concrete mixture design.

b. Quality control of concrete materials and concrete paving construction practices.

2. Require representatives of each entity directly concerned with concrete paving to attend, including the following:

a. Contractor's superintendent.

b. Concrete paving Subcontractor.

3.4 ACTION SUBMITTALS

A. Product Data: For each of the following:

1. Joint Sealant/Filler

2. Concrete Mix/admixtures

3. Concrete curing compounds

4. Aggregate

5. Epoxy Coated Rebar/Ties

6. Grass Seed Mixture

B. Samples for Initial Selection: For each type of product, ingredient, or admixture requiring color selection.

C. Design Mixtures: For each concrete paving mixture. Include alternate design mixtures when characteristics of materials, Project conditions, weather, test results, or other circumstances warrant adjustments. Consult and verify alternate design mix with COR.

D. Shop Drawings

E. Grass seed mix – Park Specific: 40% Buffalo Grass, 30% Side Oats Gramma, 30% Blue Gramma

3.5 INFORMATIONAL SUBMITTALS

A. Qualification Data: For qualified ready-mix concrete manufacturer.

B. Material Test Reports: For each of the following:

SECTION 32 13 13 CONCRETE PAVING 2

1. Aggregates

3.6 SUBMITTAL COORDINATION

A. Submittal List: A submittal list has been attached to the end of this Specification Section. The intent is to provide an overall summary of the submittal requirements and not a comprehensive list. The requirements of the individual Specification Sections, terms and conditions of the Contract still apply regardless of what is shown on the submittal list. Attachment: Require Submittals.

3.7 QUALITY ASSURANCE

A. Ready-Mix-Concrete Manufacturer Qualifications: A firm experienced in manufacturing ready-mixed concrete products and that complies with ASTM C 94 requirements for production facilities and equipment.

1. Manufacturer certified according to NRMCA's "Certification of Ready Mixed Concrete Production Facilities" (Quality Control Manual - Section 3, "Plant Certification Checklist").

3.8 FIELD CONDITIONS

A. Traffic Control: Maintain access for vehicular and pedestrian traffic as required for other construction activities.

B. Cold-Weather Concrete Placement: Protect concrete work from physical damage or reduced strength that could be caused by frost, freezing, or low temperatures. Comply with ACI 306.1 and the following:

1. When air temperature has fallen to or is expected to fall below 40 deg F, uniformly heat water and aggregates before mixing to obtain a concrete mixture temperature of not less than 50 deg F and not more than 80 deg F at point of placement.

2. Do not use frozen materials or materials containing ice or snow.

3. Do not use calcium chloride, salt, or other materials containing antifreeze agents or chemical accelerators unless otherwise specified and approved in design mixtures.

C. Hot-Weather Concrete Placement: Comply with ACI 301 and as follows when hot-weather conditions exist:

1. Cool ingredients before mixing to maintain concrete temperature below 90 deg F at time of placement. Chilled mixing water or chopped ice may be used to control temperature, provided water equivalent of ice is calculated in total amount of mixing water.

Using liquid nitrogen to cool concrete is Contractor's option.

2. Cover steel reinforcement with water-soaked burlap, so steel temperature will not exceed ambient air temperature immediately before embedding in concrete.

3. Fog-spray forms and subgrade just before placing concrete. Keep subgrade moisture uniform without standing water, soft spots, or dry areas.

PART 4 - PRODUCTS

4.1 CONCRETE, GENERAL

A. ACI Publications: Comply with ACI 301 unless otherwise indicated.

4.2 FORMS

A. Form Materials: Plywood, metal, metal-framed plywood, or other approved panel-type materials to provide full-depth, continuous, straight, and smooth exposed surfaces.

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1. Use flexible or uniformly curved forms for curves with a radius of 100 feet or less. Do not use notched and bent forms.

B. Form-Release Agent: Commercially formulated form-release agent that will not bond with, stain, or adversely affect concrete surfaces and that will not impair subsequent treatments of concrete surfaces.

4.3 STEEL REINFORCEMENT

A. Epoxy-Coated Reinforcing Bars: ASTM A 775 or ASTM A 934; with ASTM A 615, Grade 60 deformed bars.

B. Epoxy-Coated, Joint Dowel Bars: ASTM A 775; with ASTM A 615, Grade 60 plain-steel bars.

C. Bar Supports: Bolsters, chairs, spacers, and other devices for spacing, supporting, and fastening reinforcing bars, welded-wire reinforcement, and dowels in place. Manufacture bar supports according to CRSI's "Manual of Standard Practice" plastic of greater compressive strength than concrete specified, and as follows:

1. Equip plastic bar supports with sand plates or horizontal runners where base material will not support chair legs.

2. For epoxy-coated reinforcement, use epoxy-coated or other dielectric-polymer-coated wire bar supports.

4.4 CONCRETE MATERIALS

A. Cementitious Materials: Use the following cementitious materials, of same type, brand, and source throughout Project:

1. Portland Cement: ASTM C 150, gray portland cement Type I/II.

B. Normal-Weight Aggregates: ASTM C 33, uniformly graded. Provide aggregates from a single source with documented service-record data of at least 10 years' satisfactory service in similar paving applications and service conditions using similar aggregates and cementitious materials.

1. Maximum Coarse Aggregate Size: 1-inch nominal.

2. Fine Aggregate: Free of materials with deleterious reactivity to alkali in cement.

3. Aggregate Sizes: ¾ INCH nominal.

4. Aggregate Source, Shape, and Color: Red Limestone

C. Air-Entraining Admixture: ASTM C 260.

D. Chemical Admixtures: Admixtures certified by manufacturer to be compatible with other admixtures and to contain not more than 0.1 percent water-soluble chloride ions by mass of cementitious material.

1. Water-Reducing Admixture: ASTM C 494.

2. Retarding Admixture: ASTM C 494.

3. Plasticizing and Retarding Admixture: ASTM C 1017.

E. Water: Potable and complying with ASTM C 94.

4.5 CURING MATERIALS

A. Absorptive Cover: AASHTO M 182, Class 3, burlap cloth made from jute or kenaf, weighing approximately 9 oz./sq. yd. dry.

B. Moisture-Retaining Cover: ASTM C 171, polyethylene film or white burlap-polyethylene sheet.

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C. Clear, Waterborne, Membrane-Forming Curing Compound: ASTM C 309, Type 1, Class B, dissipating.

D. White, Waterborne, Membrane-Forming Curing Compound: ASTM C 309, Type 2, Class B, dissipating.

4.6 JOINT SEALANTS

A. Compatibility: Provide joint sealants, backing materials, and other related materials that are compatible with one another and with joint substrates under conditions of service and application, as demonstrated by joint-sealant manufacturer, based on testing and field experience.

B. Cold-Applied Joint Sealants

1. Single-Component, Nonsag, Silicone Joint Sealant: ASTM D5893

C. Hot-Applied Joint Sealants

1. Hot-Applied, Single-Component Joint sealant: ASTM D6690.

4.7 RELATED MATERIALS

A. Joint Fillers: ASTM D 1751, asphalt-saturated cellulosic fiber in preformed strips.

4.8 CONCRETE MIXTURES

A. Prepare design mixtures, proportioned according to ACI 301, for each type and strength of normal-weight concrete, and as determined by either laboratory trial mixtures or field experience.

1. Use a qualified independent testing agency for preparing and reporting proposed concrete design mixtures for the trial batch method.

2. When automatic machine placement is used, determine design mixtures and obtain laboratory test results that comply with or exceed requirements.

B. Add air-entraining admixture at manufacturer's prescribed rate to result in normal-weight concrete at point of placement having an air content as follows:

1. Air Content: 6 percent plus or minus 1-1/2 percent for 3/4-inch nominal maximum aggregate size.

C. Chemical Admixtures: Use admixtures according to manufacturer's written instructions.

1. Use water-reducing and retarding admixture when required by high temperatures, low humidity, or other adverse placement conditions.

D. Concrete Mixtures: Normal-weight concrete.

1. Compressive Strength (28 Days): 4000 psi for sidewalks, pavement, curbs and gutters.

2. Maximum W/C Ratio at Point of Placement: 0.45.

3. Slump Limit: 3 inches, plus or minus 1 inch.

4.9 CONCRETE MIXING

A. Ready-Mixed Concrete: Measure, batch, and mix concrete materials and concrete according to ASTM C 94. Furnish batch certificates for each batch discharged and used in the Work.

1. When air temperature is between 85 and 90 deg F, reduce mixing and delivery time from 1-1/2 hours to 75 minutes; when air temperature is above 90 deg F, reduce mixing and delivery time to 60 minutes.

SECTION 32 13 13 CONCRETE PAVING 5

B. Project-Site Mixing: Measure, batch, and mix concrete materials and concrete according to ASTM C 94.

Mix concrete materials in appropriate drum-type batch machine mixer.

1. For concrete batches of 1 cu. yd. or smaller, continue mixing at least 1-1/2 minutes, but not more than 5 minutes after ingredients are in mixer, before any part of batch is released.

2. For concrete batches larger than 1 cu. yd., increase mixing time by 15 seconds for each additional 1 cu. yd.

3. Provide batch ticket for each batch discharged and used in the Work, indicating Project identification name and number, date, mixture type, mixing time, quantity, and amount of water added.

4.10 SEED

A. Grass Seed: Fresh, clean, dry, new-crop seed complying with AOSA's "Rules for Testing Seeds" for purity and germination tolerances.

B. Seed Species:

1. 40% Buffalo Grass, 30% Blue Gramma, 30% Side Oats Gramma

PART 5 - EXECUTION

5.1 SITE CLEARING

A. Remove slabs, paving, curbs, gutters, and walks as indicated.

1. Unless existing full-depth joints coincide with line of demolition, neatly saw-cut along line of existing pavement to remain before removing adjacent existing pavement.

Saw-cut faces vertically.

2. Paint cut ends of any steel reinforcement in concrete to remain with two coats of antirust coating, following coating manufacturer’s written instructions. Keep paint off surfaces that will remain exposed.

B. Remove sod and grass before stripping topsoil. Contractor to identify and determine depth of existing topsoil. Strip topsoil in a manner to prevent intermingling with underlying subsoil or other waste materials.

1. Stockpile topsoil away from edge of excavations without intermixing with subsoil or other materials. Grade and shape stockpiles to drain surface water. Cover to prevent windblown dust and erosion by water.

2. Dispose of surplus topsoil. Surplus topsoil is that which exceeds quantity indicated to be stockpiled or reused.

C. Remove surplus soil material, demolished materials, and waste materials including trash and debris, and legally dispose of them off Government’s property.

5.2 EXAMINATION

A. Examine exposed subgrades and subbase surfaces for compliance with requirements for dimensional, grading, and elevation tolerances.

B. Proceed with installation only after unsatisfactory conditions have been corrected.

5.3 PREPARATION

A. Uniformly moisten or aerate subgrade and each subsequent fill or backfill soil layer before compaction to within 2 percent of optimum moisture content.

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1. Do not place backfill or fill soil material on surfaces that are muddy, frozen, or contain frost or ice.

2. Remove and replace, or scarify and air dry, otherwise satisfactory soil material that exceeds optimum moisture content by 2 percent and is too wet to compact to specified dry unit weight.

B. Under pavement and walks, install 12 inches of red limestone aggregate subgrade at 95 percent of maximum dry unit weight according to ASTM D698.

C. Remove loose material from compacted subbase surface immediately before placing concrete.

D. Protect subgrades from freezing temperatures and frost. Remove temporary protection before placing subsequent materials.

E. Repair and reestablish grades where completed or partially completed surfaces become eroded, rutted, settled, or where they lose compaction due to subsequent construction operations or weather conditions.

5.4 EDGE FORMS AND SCREED CONSTRUCTION

A. Set, brace, and secure edge forms, bulkheads, and intermediate screed guides to required lines, grades, and elevations. Install forms to allow continuous progress of work and so forms can remain in place at least 24 hours after concrete placement.

B. Clean forms after each use and coat with form-release agent to ensure separation from concrete without damage.

5.5 STEEL REINFORCEMENT INSTALLATION

A. General: Comply with CRSI's "Manual of Standard Practice" for fabricating, placing, and supporting reinforcement.

B. Clean reinforcement of loose rust and mill scale, earth, ice, or other bond-reducing materials.

C. Arrange, space, and securely tie bars and bar supports to hold reinforcement in position during concrete placement. Maintain minimum cover to reinforcement.

D. Epoxy-Coated Reinforcement: Use epoxy-coated steel wire ties to fasten epoxy-coated reinforcement.

Repair cut and damaged epoxy coatings with epoxy repair coating according to ASTM D 3963/D 3963M.

5.6 JOINTS

A. General: Form construction, isolation, and contraction joints and tool edges true to line, with faces perpendicular to surface plane of concrete. Construct transverse joints at right angles to centerline unless otherwise indicated.

1. When joining existing paving, place transverse joints to align with previously placed joints unless otherwise indicated.

B. Construction Joints: Set construction joints at side and end terminations of paving and at locations where paving operations are stopped for more than one-half hour unless paving terminates at isolation joints.

1. Continue steel reinforcement across construction joints unless otherwise indicated. Do not continue reinforcement through sides of paving strips unless otherwise indicated.

2. Provide tie bars at sides of paving strips where indicated.

3. Keyed Joints: Provide preformed keyway-section forms or bulkhead forms with keys unless otherwise indicated. Embed keys at least 1-1/2 inches into concrete.

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4. Doweled Joints: Install dowel bars and support assemblies at joints where indicated. Lubricate or coat with asphalt one-half of dowel length to prevent concrete bonding to one side of joint.

C. Isolation Joints: Form isolation joints of preformed joint-filler strips abutting concrete curbs, catch basins, manholes, inlets, structures, other fixed objects, and where indicated.

1. Extend joint fillers full width and depth of joint.

2. Terminate joint filler not less than 1/2 inch or more than 1 inch below finished surface if joint sealant is indicated.

3. Place top of joint filler flush with finished concrete surface if joint sealant is not indicated.

4. Furnish joint fillers in one-piece lengths. Where more than one length is required, lace or clip joint-filler sections together.

5. During concrete placement, protect top edge of joint filler with metal, plastic, or other temporary preformed cap. Remove protective cap after concrete has been placed on both sides of joint.

D. Contraction Joints: Form weakened-plane contraction joints, sectioning concrete into areas as indicated. Construct contraction joints for a depth equal to at least one-fourth of the concrete thickness, as follows, to match jointing of existing adjacent concrete paving:

1. Grooved Joints: Form contraction joints after initial floating by grooving and finishing each edge of joint with grooving tool to a 1/4-inch radius. Repeat grooving of contraction joints after applying surface finishes. Eliminate grooving-tool marks on concrete surfaces.

2. Sawed Joints: Form contraction joints with power saws equipped with shatterproof abrasive or diamond-rimmed blades. Cut 1/8-inch- wide joints into concrete when cutting action will not tear, abrade, or otherwise damage surface and before developing random contraction cracks.

E. Edging: After initial floating, tool edges of paving, gutters, curbs, and joints in concrete with an edging tool to a 1/4-inch radius. Repeat tooling of edges after applying surface finishes. Eliminate edging-tool marks on concrete surfaces.

5.7 CONCRETE PLACEMENT

A. Before placing concrete, inspect and complete formwork installation and items to be embedded or cast-in.

B. Remove snow, ice, or frost from subbase surface before placing concrete. Do not place concrete on frozen surfaces.

C. Moisten subbase to provide a uniform dampened condition at time concrete is placed. Do not place concrete around manholes or other structures until they are at required finish elevation and alignment.

D. Comply with ACI 301 requirements for measuring, mixing, transporting, and placing concrete.

E. Do not add water to concrete during delivery or at Project site. Do not add water to fresh concrete after testing.

F. Deposit and spread concrete in a continuous operation between transverse joints. Do not push or drag concrete into place or use vibrators to move concrete into place.

G. Consolidate concrete according to ACI 301 by mechanical vibrating equipment supplemented by hand spading, rodding, or tamping.

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1. Consolidate concrete along face of forms and adjacent to transverse joints with an internal vibrator. Keep vibrator away from joint assemblies, reinforcement, or side forms.

Use only square-faced shovels for hand spreading and consolidation. Consolidate with care to prevent dislocating joint devices.

H. Screed paving surface with a straightedge and strike off.

I. Commence initial floating using bull floats or darbies to impart an open-textured and uniform surface plane before excess moisture or bleedwater appears on the surface. Do not further disturb concrete surfaces before beginning finishing operations or spreading surface treatments.

5.8 FLOAT FINISHING

A. General: Do not add water to concrete surfaces during finishing operations.

B. Float Finish: Begin the second floating operation when bleedwater sheen has disappeared and concrete surface has stiffened sufficiently to permit operations. Float surface with power-driven floats or by hand floating if area is small or inaccessible to power units. Finish surfaces to true planes. Cut down high spots and fill low spots. Refloat surface immediately to uniform granular texture.

1. Medium-to-Fine-Textured Broom Finish: Draw a soft-bristle broom across float-finished concrete surface, perpendicular to line of traffic, to provide a uniform, fine-line texture.

5.9 CONCRETE PROTECTION AND CURING

A. General: Protect freshly placed concrete from premature drying and excessive cold or hot temperatures.

B. Comply with ACI 306.1 for cold-weather protection.

C. Evaporation Retarder: Apply evaporation retarder to concrete surfaces if hot, dry, or windy conditions cause moisture loss approaching 0.2 lb/sq. ft. x h before and during finishing operations. Apply according to manufacturer's written instructions after placing, screeding, and bull floating or darbying concrete but before float finishing.

D. Begin curing after finishing concrete but not before free water has disappeared from concrete surface.

E. Curing Methods: Cure concrete by moisture-retaining-cover curing, curing compound or a combination of these as follows:

1. Moisture-Retaining-Cover Curing: Cover concrete surfaces with moisture-retaining cover, placed in widest practicable width, with sides and ends lapped at least 12 inches, and sealed by waterproof tape or adhesive. Immediately repair any holes or tears occurring during installation or curing period, using cover material and waterproof tape.

2. Curing Compound: Apply uniformly in continuous operation by power spray or roller according to manufacturer's written instructions. Recoat areas subjected to heavy rainfall within three hours after initial application. Maintain continuity of coating, and repair damage during curing period.

5.10 PAVING TOLERANCES

A. Comply with tolerances in ACI 117 and as follows:

1. Elevation: 3/4 inch.

2. Thickness: Plus 3/8 inch, minus 1/4 inch.

3. Surface: Gap below 10-feet-long; unleveled straightedge not to exceed 1/2 inch.

4. Joint Spacing: 3 inches.

5. Contraction Joint Depth: Plus 1/4 inch, no minus.

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6. Joint Width: Plus 1/8 inch, no minus.

5.11 INSTALLATION OF JOINT SEALANTS

A. Comply with joint-sealant manufacturer's written installation instructions for products and applications indicated unless more stringent requirements apply.

B. Cleaning of Joints: Clean out joints immediately to comply with joint-sealant manufacturer's written instructions.

C. Joint Priming: Prime joint substrates where indicated or where recommended in writing by joint-sealant manufacturer.

D. Joint-Sealant Installation Standard: Comply with recommendations in ASTM C 1193 for use of joint sealants as applicable to materials, applications, and conditions.

E. Install joint-sealant backings to support joint sealants during application and at position required to produce cross-sectional shapes and depths of installed sealants relative to joint widths that allow optimum sealant movement capability.

1. Do not leave gaps between ends of joint-sealant backings.

2. Do not stretch, twist, puncture, or tear joint-sealant backings.

3. Remove absorbent joint-sealant backings that have become wet before sealant application and replace them with dry materials.

F. Install joint sealants immediately following backing installation, using proven techniques that comply with the following:

1. Place joint sealants so they fully contact joint substrates.

2. Completely fill recesses in each joint configuration.

3. Produce uniform, cross-sectional shapes and depths relative to joint widths that allow optimum sealant movement capability.

G. Tooling of Nonsag Joint Sealants: Immediately after joint-sealant application and before skinning or curing begins, tool sealants according to the following requirements to form smooth, uniform beads of configuration indicated; to eliminate air pockets; and to ensure contact and adhesion of sealant with sides of joint:

1. Remove excess joint sealant from surfaces adjacent to joints.

2. Use tooling agents that are approved in writing by joint-sealant manufacturer and that do not discolor sealants or adjacent surfaces.

H. Provide joint configuration to comply with joint-sealant manufacturer's written instructions unless otherwise indicated.

I. Clean off excess joint sealant as the Work progresses, by methods and with cleaning materials approved in writing by joint-sealant manufacturers.

5.12 SITE RESTORATION

A. Renovate turf damaged by Contractor’s operations, such as storage of materials or equipment and movement of vehicles.

1. Reestablish turf where settlement or washouts occur or where minor regrading is required.

2. Install new planting soil as required.

B. Remove sod and vegetation from diseased or unsatisfactory turf areas; do not bury in soil.

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C. Remove topsoil containing foreign materials, such as oil drippings, fuel spills, stones, gravel, and other construction materials resulting from Contractor's operations, and replace with new planting soil.

D. Mow, dethatch, core aerate, and rake existing turf.

E. Remove weeds before seeding. Where weeds are extensive, apply selective herbicides as required.

Do not use pre-emergence herbicides.

F. Remove waste and foreign materials, including weeds, soil cores, grass, vegetation, and turf, and legally dispose of them off Owner's property.

G. Till stripped, bare, and compacted areas thoroughly to a soil depth of 6 inches.

H. Apply soil amendments and initial fertilizer required for establishing new turf and mix thoroughly into top 4 inches of existing soil. Install new planting soil to fill low spots and meet finish grades.

I. Sow seed with spreader or seeding machine. Do not broadcast or drop seed when wind velocity exceeds 5 mph.

1. Evenly distribute seed by sowing equal quantities in two directions at right angles to each other.

2. Do not use wet seed or seed that is moldy or otherwise damaged.

J. Sow seed at a total rate of 5 lb./1000 sq. ft. per park specific seed specifications. Seed mixture is 40% Buffalo Grass, 30% Side Oats Gramma, 30% Blue Gramma.

K. Rake seed lightly into top 1/8 inch of soil, roll lightly, and water with fine spray.

L. Protect seeded areas by spreading natural jute fiber matting and securing to prevent blow off.

M. Water newly planted areas and keep moist until new turf is established.

5.13 REPAIR AND PROTECTION

A. Remove and replace concrete paving that is broken, damaged, or defective or that does not comply with requirements in this Section. Remove work in complete sections from joint to joint unless otherwise approved by COR.

B. Drill test cores where directed by COR, when necessary to determine magnitude of cracks or defective areas. Fill drilled core holes in satisfactory paving areas with portland cement concrete bonded to paving with epoxy adhesive.

C. Protect concrete paving from damage. Exclude traffic from paving for at least 14 days after placement.

When construction traffic is permitted, maintain paving as clean as possible by…