ITB_ENG250564_Terminal_Apron_Rehabilitation_-_OCF_Ocala_International_Airport_-_Exhibit_H_-_Technical_Specifications.pdf

TECHNICAL

SPECIFICATIONS

BID DOCUMENTS

TERMINAL APRON

REHABILITATION

AT OCALA INT. AIRPORT

Exhibit H- Technical Specifications CONTRACT# ENG/250564

H-1

Item S-100

FDOT Standard Specifications (BID SCHEDULE 2)

FDOT specifications which will govern the prosecution of the work where set out in the proposal and/or shown on the plans shall conform in their entirety to Divisions II and III of the Florida Department of Transportation Standard Specification for Road and Bridge Construction, latest edition, including all FDOT Supplements and as modified hereinafter. The construction details contained in the Divisions which are not required to accomplish the work set out in proposal and/or shown on the plans will have no application to these specifications.

In the event of any conflict(s) between the Contract Documents and the FDOT Standard Specifications, the precedence in resolving such conflict(s) shall be as follows:

1. Bidding and Contract requirements, and Technical Specifications for the “Terminal Apron Rehabilitation” as located in this bid package shall govern over FDOT Bid and Contract Requirements.

2. Greater quantities shall govern over lesser.

3. Higher quality and/or more stringent requirements as adjudged by the Engineer shall govern over lesser.

Where FDOT Specifications refer to the “Engineer”, “Engineer of Tests”, or “Division of Tests”, it shall be understood to mean the Engineer of the Owner as stated in the CONTRACT.

These standard specifications can be obtained from the Florida Department of Transportation at http://www.dot.state.fl.us/programmanagement/specs.shtm or call Area Code (850) 414-4130.

Specifications pertinent to this project from the Standard Specifications for Road and Bridge Construction are as follows:

FDOT Section Description

101 Mobilization 300 Tack Coat 327 Milling of Existing Asphalt Pavement 330 Hot Bituminous Mixtures – General Construction Requirements 334 Superpave Asphalt Concrete 710 Painted Pavement Markings

Specification sections not specified above but cross-referenced in the above individual sections are also included herewith and made a part of these Contract Documents.

Modifications to FDOT Standard Specifications:

Section 334 – Superpave Asphalt Concrete:

1. Mix designs shall be for traffic levels A, B, or C

2. A lot used for acceptance testing will be based on one day’s production with each lot divided onto 4 sublots, regardless of tonnage.

3. Acceptance shall not be based on visual inspection, regardless of tonnage.

H-2

Method of measurement and basis of payment for material and work performed in conformance with the above specifications shall be as indicated on the BID SCHEDULE. The unit cost bid shall be full compensation for labor, equipment, materials and incidentals necessary to complete the work in conformance with the Plans and Specifications to the satisfaction of the Owner. Incidentals include, but are not limited to, items which have specific DOT bid item numbers in the referenced specifications but are not included in the Bid Schedule.

END OF ITEM S-100

H-3

Item 02000

Construction Layout and Topographic As-Built Survey

PART 1 - GENERAL

1.1 DESCRIPTION

The work covered by this section includes:

A. Verification Survey: Surveying engineer provided benchmarks and control points and performing spot checks on pavements and grades (cut or fill). Surveyor has the responsibility of reporting any known problems or discrepancies in field data including established control points by the Engineer for the Contractor prior to the start of the construction work and ordering materials to the Engineer. The Contractor shall take all necessary precautions to prevent the loss or damage of primary control points that Engineer has established for the Contractor.

B. Construction Staking: Involves the establishment of horizontal alignment and vertical alignments, proposed grades on all pipes, foundations, pavement markings, and slopes.

If identified in the plan sheet notes or scope of work, the surveyor may be required to verify surface elevations for contractor or engineer.

Contractor shall establish a sufficient number of benchmarks and cut/fill stakes for the engineer’s instrument and/or visual checking.

C. As-built Survey

The as-built topographic survey shall be provided to the engineer with closeout documents.

Limits of As Built shall be the project limits or the construction limits as identified on the plans. When no project limits are indicated on the drawings, the contractor shall assume the limits to include all disturbed areas. The survey shall be signed and sealed by surveyor licensed in the state of the project.

PRODUCTS (Not Used)

PART 2 - EXECUTION

2.1 Topographic survey for controlling pavement thickness shall be on a grid spacing that can be easily followed either by electronic grade control measures or establishing stringlines for the contractor’s machines to follow. If the engineer deems proper control is not being maintained, he has the authority to instruct the contractor to decrease the topographic grid spacing and provide tighter controls on the vertical work without additional compensation to the contractor.

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2.2 Since accurate topographic as-built information is required for closing out all stormwater permits, for the owners Airport Layout Plan, and for engineer’s general verification of finished grades, the contractor shall be required to provide as-built topographic surveys signed and sealed by a registered surveyor in the State of Florida. When the project is substantially complete, the contractor shall begin the field survey work for as-built drawings. As-built topographic survey shall include all above ground features within the project area with special focus on the following:

1. Horizontal and vertical locations of underground utilities (water, sewer, power, etc.), conduits, handholes, pull boxes, hydrants and other various appurtenances, referenced to established project datum and coordinate system (state plane most likely). Sewer lines must have all inverts and pipe slopes labeled. Label all pipe and conduit sizes.

2. All bituminous pavements at an acceptable grid to verify pavement cross slopes and longitudinal grades. Concrete pavements shall be at all slab corners to verify cross slopes and longitudinal grades.

3. All ponds at an acceptable grid to accurately calculated pond volumes for permit as built certifications to be submitted by the engineer.

4. Ground elevations at an acceptable grid to verify earthwork volumes.

5. Painted centerlines, callouts, signs, hold markings, and edges. Label radii.

6. Storm drainage system construction:

a. Exact distance between all catch basins, manholes, points of intersection, and line terminals or headwalls.

b. The invert elevation of the end of all pipes, stubouts, and headwalls.

c. The rim (top of frame) or top of grate and invert elevations of all manholes, catch basins, and other structures.

d. Elevation and size of all weirs, orifices, and skimmers.

7. Finished floor elevations.

8. Sign sizes and text.

9. Electrical construction identification:

a. Exact distance between all manholes and points of intersection.

b. Exact size and location of duct bank or cable run and what circuits it feeds.

c. Exact location of any lines abandoned in place.

d. Exact location, type, and size of runway and taxiway edge lights, centerline lights, and/or touchdown zone lights.

e. Rim and invert elevation of all manholes and duct banks.

f. Depth of cover on direct burial lines.

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g. Locations of cable splices.

10. Finished floor elevations.

11. Street sign and airfield guide signs and text descriptions.

12. Water and Sewer in accordance with notes on utility plans.

13. All horizontal control shall be in accordance with state statutes but no greater than tenth of a foot for horizontal data and one-hundredth of a foot for vertical.

All documents provided to the engineer must be submitted by a licensed professional survey in the State of Florida. Sealed drawings and original signatures shall be provided when requested. Electronic files in AutoCAD format shall also be sent to the engineer at his request.

2.3 PAYMENT:

A. The contractor shall be eligible for partial payments of the lump sum item, Construction Layout and Topographic As-Built Survey. Payment will be made based on the percent complete of the dollar amount of the contract.

END OF ITEM 02000

H-6

Item P-101

Preparation/Removal of Existing Pavements

DESCRIPTION

101-1 This item shall consist of preparation of existing pavement surfaces for overlay, surface treatments, removal of existing pavement, and other miscellaneous items. The work shall be accomplished in accordance with these specifications and the applicable plans.

EQUIPMENT AND MATERIALS

101-2 All equipment and materials shall be specified here and in the following paragraphs or approved by the Resident Project Representative (RPR). The equipment shall not cause damage to the pavement to remain in place.

CONSTRUCTION

101-3.1 Removal of existing pavement.

The Contractor’s removal operation shall be controlled to not damage adjacent pavement structure, and base material, cables, utility ducts, pipelines, or drainage structures which are to remain under the pavement.

a. Concrete pavement removal. Full depth saw cuts shall be made perpendicular to the slab surface.

The Contractor shall saw through the full depth of the slab including any dowels at the joint, removing the pavement and installing new dowels as shown on the plans and per the specifications. Where the perimeter of the removal limits is not located on the joint and there are no dowels present, the perimeter shall be saw cut the full depth of the pavement. The pavement inside the saw cut shall be removed by methods which will not cause distress in the pavement which is to remain in place. If the material is to be wasted on the airport site, it shall be reduced to a maximum size of [ ]. Concrete slabs that are damaged by under breaking shall be repaired or removed and replaced as directed by the RPR.

The edge of existing concrete pavement against which new pavement abuts shall be protected from damage at all times. Spall and underbreak repair shall be in accordance with the plans. Any underlaying material that is to remain in place, shall be recompacted and/or replaced as shown on the plans. Adjacent areas damaged during repair shall be repaired or replaced at the Contractor’s expense.

b. Asphalt pavement removal. Asphalt pavement to be removed shall be cut to the full depth of the asphalt pavement around the perimeter of the area to be removed. If the material is to be wasted on the airport site, it shall be broken to a maximum size as designated by the Airport Owner.

c. Repair or removal of Base, Subbase, and/or Subgrade. All failed material including surface, base course, subbase course, and subgrade shall be removed and repaired as shown on the plans or as directed by the RPR. Materials and methods of construction shall comply with the applicable sections of these specifications. Any damage caused by Contractor’s removal process shall be repaired at the Contractor’s expense.

101-3.2 Preparation of joints and cracks prior to overlay/surface treatment. Remove all vegetation and debris from cracks to a minimum depth of 1 inch (25 mm). If extensive vegetation exists, treat the specific area with a concentrated solution of a water-based herbicide approved by the RPR. Fill all cracks greater

H-7 than 1/4 inch (6 mm) wide) with a crack sealant per ASTM D6690. The crack sealant, preparation, and application shall be compatible with the surface treatment/overlay to be used. To minimize contamination of the asphalt with the crack sealant, underfill the crack sealant a minimum of 1/8 inch (3 mm), not to exceed ¼ inch (6 mm). Any excess joint or crack sealer shall be removed from the pavement surface.

101-3.3 Removal of Foreign Substances/contaminates prior to [ overlay ] [ seal-coat ] [ remarking ]. Removal of foreign substances/contaminates from existing pavement that will affect the bond of the new treatment shall consist of removal of rubber, fuel spills, oil, crack sealer, at least 90% of paint, and other foreign substances from the surface of the pavement. Areas that require removal are designated on the plans and as directed by the RPR in the field during construction.

may be used. If chemicals are used, they shall comply with the state’s environmental protection regulations.

Removal methods used shall not cause major damage to the pavement, or to any structure or utility within or adjacent to the work area. Major damage is defined as changing the properties of the pavement, removal of asphalt causing the aggregate to ravel, or removing pavement over 1/8 inch (3 mm) deep. If it is deemed by the RPR that damage to the existing pavement is caused by operational error, such as permitting the application method to dwell in one location for too long, the Contractor shall repair the damaged area without compensation and as directed by the RPR.

Removal of foreign substances shall not proceed until approved by the RPR. Water used for high-pressure water equipment shall be provided by the Contractor at the Contractor's expense. No material shall be deposited on the pavement shoulders. All wastes shall be disposed of in areas indicated in this specification or shown on the plans.

101-3.4 Concrete spall or failed asphaltic concrete pavement repair.

a. Repair of concrete spalls in areas to be overlaid with asphalt. The Contractor shall repair all spalled concrete as shown on the plans or as directed by the RPR. The perimeter of the repair shall be saw cut a minimum of 2 inches (50 mm) outside the affected area and 2 inches (50 mm) deep. The deteriorated material shall be removed to a depth where the existing material is firm or cannot be easily removed with a geologist pick. The removed area shall be filled with asphalt mixture with aggregate sized appropriately for the depth of the patch. The material shall be compacted with equipment approved by the RPR until the material is dense and no movement or marks are visible. The material shall not be placed in lifts over 4 inches (100 mm) in depth. This method of repair applies only to pavement to be overlaid.

b. Asphalt pavement repair. The Contractor shall repair all spalled concrete as shown on the plans or as directed by the RPR. The failed areas shall be removed as specified in paragraph 101-3.1b. All failed material including surface, base course, subbase course, and subgrade shall be removed. Materials and methods of construction shall comply with the applicable sections of these specifications.

101-3.5 Cold milling. Milling shall be performed with a power-operated milling machine or grinder, capable of producing a uniform finished surface. The milling machine or grinder shall operate without tearing or gouging the underlaying surface. The milling machine or grinder shall be equipped with grade and slope controls, and a positive means of dust control. All millings shall be removed and disposed off Airport property . If the Contractor mills or grinds deeper or wider than the plans specify, the Contractor shall replace the material removed with new material at the Contractor’s Expense.

a. Patching. The milling machine shall be capable of cutting a vertical edge without chipping or spalling the edges of the remaining pavement and it shall have a positive method of controlling the depth of cut. The RPR shall layout the area to be milled with a straightedge in increments of 1-foot (30 cm) widths. The area to be milled shall cover only the failed area. Any excessive area that is milled because the Contractor doesn’t have the appropriate milling machine, or areas that are damaged because of his negligence, shall be repaired by the Contractor at the Contractor’s Expense.

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b. Profiling, grade correction, or surface correction. The milling machine shall have a minimum width of [ 7 ] feet ([ 2 ] m) and it shall be equipped with electronic grade control devices that will cut the surface to the grade specified. The tolerances shall be maintained within +0 inch and -1/4 inch (+0 mm and -6mm) of the specified grade. The machine must cut vertical edges and have a positive method of dust control. The machine must have the ability to remove the millings or cuttings from the pavement and load them into a truck . All millings shall be removed and disposed of off the airport.

c. Clean-up. The Contractor shall sweep the milled surface daily and immediately after the milling until all residual materials are removed from the pavement surface. Prior to paving, the Contractor shall wet down the milled pavement and thoroughly sweep and/or blow the surface to remove loose residual material. Waste materials shall be collected and removed from the pavement surface and adjacent areas by sweeping or vacuuming. Waste materials shall be removed and disposed off Airport property.

101-3.6. Preparation of asphalt pavement surfaces prior to surface treatment. Existing asphalt pavements to be treated with a surface treatment shall be prepared as follows:

a. Patch asphalt pavement surfaces that have been softened by petroleum derivatives or have failed due to any other cause. Remove damaged pavement to the full depth of the damage and replace with new asphalt pavement similar to that of the existing pavement in accordance with paragraph 101-3.4b.

b. Repair joints and cracks in accordance with paragraph 101-3.2.

c. Remove oil or grease that has not penetrated the asphalt pavement by scrubbing with a detergent and washing thoroughly with clean water. After cleaning, treat these areas with an oil spot primer

d. Clean pavement surface immediately prior to placing the surface treatment so that it is free of dust, dirt, grease, vegetation, oil or any type of objectionable surface film.

101-3.7 Maintenance. The Contractor shall perform all maintenance work necessary to keep the pavement in a satisfactory condition until the full section is complete and accepted by the RPR. The surface shall be kept clean and free from foreign material. The pavement shall be properly drained at all times. If cleaning is necessary or if the pavement becomes disturbed, any work repairs necessary shall be performed at the Contractor’s expense.

101-3.8 Preparation of Joints in Rigid Pavement prior to resealing. Prior to application of sealant material, clean and dry the joints of all scale, dirt, dust, old sealant, curing compound, moisture and other foreign matter. The Contractor shall demonstrate, in the presence of the RPR, that the method used cleans the joint and does not damage the joint.

101-3.8.1 Removal of Existing Joint Sealant. All existing joint sealants will be removed by plowing or use of hand tools. Any remaining sealant and or debris will be removed by use of wire brushes or other tools as necessary. Resaw joints removing no more than 1/16 inch (2 mm) from each joint face.

Immediately after sawing, flush out joint with water and other tools as necessary to completely remove the slurry.

101-3.8.2 Cleaning prior to sealing. Immediately before sealing, joints shall be cleaned by removing any remaining laitance and other foreign material. Allow sufficient time to dry out joints prior to sealing. Joint surfaces will be surface-dry prior to installation of sealant.

101-3.8.3 Joint sealant. Joint material and installation will be in accordance with [ Item P-605 ] [ Item P-604 ].

101-3.9 Preparation of Cracks in Flexible Pavement prior to sealing. Prior to application of sealant material, clean and dry the joints of all scale, dirt, dust, old sealant, curing compound, moisture and other foreign matter. The Contractor shall demonstrate, in the presence of the RPR, that the method used cleans the cracks and does not damage the pavement.

H-9

101-3.9.1 Preparation of Crack. Widen crack with [ router ] [ random crack saw ] by removing a minimum of 1/16 inch (2 mm) from each side of crack. Immediately before sealing, cracks will be blown out with a hot air lance combined with oil and water-free compressed air.

101-3.9.2 Removal of Existing Crack Sealant. Existing sealants will be removed by [ routing ] [ random crack saw ]. Following [ routing ] [ sawing ] any remaining debris will be removed by use of a hot lance combined with oil and water-free compressed air.

101-3.9.3 Crack Sealant. Crack sealant material and installation will be in accordance with [ Item P- 605 ].

101-3.9.4 Removal of Pipe and other Buried Structures.

a. Removal of Existing Pipe Material. Remove the types of pipe as indicated on the plans. The pipe material shall be legally disposed of off-site in a timely manner following removal. Trenches shall be backfilled with material equal to or better in quality than adjacent embankment. Trenches under paved areas must be compacted to [ 95% ] of ASTM [ D1557 ]

b. Removal of Inlets/Manholes. [ Where indicated on the plans or as directed by the RPR, inlets and/or manholes shall be removed and legally disposed of off-site in a timely fashion after removal.

Excavations after removal shall be backfilled with material equal or better in quality than adjacent embankment. When under paved areas must be compacted to [ 95% ] of ASTM [ D1557 ] [ D698 ], when outside of paved areas must be compacted to [ 95% ] of ASTM D698. [ Not used. ] ]

METHOD OF MEASUREMENT

101-4.1 Pavement removal. The unit of measurement for pavement removal shall be the number of square yards removed by the Contractor. Any pavement removed outside the limits of removal because the pavement was damaged by negligence on the part of the Contractor shall not be included in the measurement for payment. No direct measurement or payment shall be made for saw cutting. Saw cutting shall be incidental to pavement removal. Dowel bar installation shall be incidental to pavement removal.

101-4.7 Removal of Pipe and other Buried Structures. No separate measurement for payment will be made. The work covered by this section shall be considered as a subsidiary obligation of the Contractor and covered under the other contract items.

101 4.1 Preparation of Cracks in Flexible Pavement prior to overlay. The unit of measurement for Preparation of Cracks in Flexible Pavement shall be incidental.

BASIS OF PAYMENT

101-5.1 Payment. Payment shall be made at contract unit price for the unit of measurement as specified above. This price shall be full compensation for furnishing all materials and for all preparation, hauling, and placing of the material and for all labor, equipment, tools, and incidentals necessary to complete this item.

Item P-101 Concrete Hardstand Removal – Per Square Yard

REFERENCES

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

H-10

Advisory Circulars (AC)

AC 150/5380-6 Guidelines and Procedures for Maintenance of Airport Pavements.

ASTM International (ASTM)

ASTM D6690 Standard Specification for Joint and Crack Sealants, Hot Applied, for Concrete and Asphalt Pavements

END OF ITEM P-101

H-11

Item S-140

Site Demolition

DESCRIPTION

140-1.1 This item consists of demolition work including complete or partial removal of existing construction as indicated on the drawings or as directed by the Engineer.

Do not begin demolition work until authorized by Owner.

140-1.2 Scope. Types of demolition work may include but are not limited to:

a. Asphaltic concrete pavement: Includes removal of existing base as required, except where indicated as asphalt surface removal or milling. Saw cut to neat, straight, vertical lines at removal limits. Asphalt surface removal is be accomplished by milling in accordance with Specification S-141 and FDOT Section 327 or other methods approved by the RPR.

d. Miscellaneous structures encountered during excavation, tie-downs, earthwork, paving, and other operations.

140-1.3 Submittals. Prior to the start of demolition work, submit a demolition plan indicating proposed methods, sequence of operations, and schedule for demolition and removal work to the Engineer for approval. Include coordination for shut-off, capping, and continuation of utility services as required; details for phasing; erosion control; removal methods; disposal of materials; salvage requirements; disconnection schedule of airfield lighting; and coordination of other work in progress.

140-1.4 Job Conditions.

a. Condition of Structures. Owner assumes no responsibility for actual condition of items or structures to be demolished.

b. Demolition and Salvage. Except where materials are designated to be incorporated into new work or retained by Owner, items indicated to be removed but of salvable value to Contractor may be removed as work progresses. Transport such salvaged items from the site as they are removed.

c. Sales. Storage or sale of removed items on site will not be permitted.

d. Protection. Provide temporary barricades and other forms of protection as required to protect workmen and the public from injury due to demolition work, to provide free and safe passage of Owner's personnel and general public to and from occupied portions of site, and to protect from damage existing work that is to remain in place. Do not overload structural elements or pavements to remain.

e. Damages. Promptly repair damages caused to adjacent or other facilities by demolition work at no cost to Owner. All such repairs must have Engineer's approval.

f. Traffic. Conduct demolition operations and debris removal in a manner to ensure minimum interference with roads, airport employees, general public, and aircraft operation areas.

g. Explosives. Use of explosives will not be permitted.

h. Environmental Controls. Use water sprinkling, temporary enclosures, and other suitable methods to limit dust and dirt rising and scattering in air to lowest practical level. Do not use water if it results in hazardous or objectionable conditions such as ice, flooding, or pollution.

i. Fencing. Except where indicated to be demolished or relocated, existing fencing shall

H-12 remain in place. However, when existing fencing interferes with the work, the fencing may be temporarily removed to facilitate construction and restored to it original condition upon completion of construction. During the interval of fence removal, security shall be maintained by the Contractor by methods approved by the Engineer. There will be no separate payment for this temporary removal, security, and replacement; this work is incidental to the construction that it interferes with.

140-1.5 Regulatory and Safety Requirements. Comply with all federal, state, and local safety, security, hauling, disposal, and environmental protection regulations.

140-1.6 Foreign Object Damage (FOD). Aircraft and aircraft engines are subject to FOD from debris and waste material lying on airfield pavements. Remove all materials that may appear on or near operational aircraft pavements due to the Contractor's operations. If necessary, the Engineer may require the Contractor to install a temporary barricade at the Contractor's expense to control the spread of FOD potential debris. The barricade shall consist of a fence covered with a fabric designed to stop the spread of debris; anchor the fence and fabric to prevent displacement by winds or jet/prop blasts. Remove barricade when no longer required.

140-1.7 Staging. Certain items cannot be demolished until after work in other phases is complete.

Coordinate work with Owner and approved phasing plan.

EXECUTION

140-2.1 Inspection. Prior to commencement of demolition work, inspect areas in which demolition will be performed. Photograph or video tape existing condition of structure surfaces, equipment or surrounding properties which could be misconstrued as damage resulting from demolition work. File photographs or tapes with Engineer prior to starting work.

140-2.2 Preparation. Provide shoring, bracing, or support to prevent movement, settlement, or collapse of structures or elements to be demolished and adjacent facilities to remain. Cease operations and notify the Engineer immediately if safety of structure or surrounding area appears to be endangered. Take precautions to support structure until determination is made for continuing operations.

140-2.3 Demolition.

a. Perform demolition work in a systematic manner. Use such methods as required to complete work indicated on drawings or directed by Engineer in accordance with the demolition plan and governing regulations.

b. Demolish concrete, excluding pavements, and masonry construction in sections; cut concrete and masonry at junctions with construction to remain using power-driven impact tools, saws, or hand tools as permitted.

c. Completely fill below-grade areas and voids resulting from demolition work. Provide fill consisting of approved soil, gravel or sand, free of trash and debris, stones over 6" diameter, roots or other organic matter. Place fill in accordance with Item P-152. Fill grout or as shown on plans for voids resulting from the removal of tie-downs.

d. Remove existing utilities and terminate in a manner conforming to the locally recognized code covering the specific utility and approved by the Engineer.

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140-2.4 Pavement Removal.

a. Sawcut existing pavement to a depth specified in plans along removal limits except as otherwise indicated. Except where milling is indicated, break up and remove pavements full depth or as otherwise indicated.

b. Edges of sawcuts shall be protected and shall be neat and square for matching new pavement to existing pavement.

c. Where no method of removal is specified or shown, Contractor may select and submit a method for Engineer's approval.

d. Pavement demolition shall be performed with minimum disturbance or vibration to adjacent pavements to remain. Any subsidence, weakening, or damage to pavement or pavement edges to remain that are caused by the Contractor's operations shall be repaired as directed by the Owner and Engineer at the sole expense of the Contractor. All repair materials and methods shall be as directed by the Engineer whose decision shall be final.

140-2.5 Compaction of Existing Base and Subgrade. Existing base material indicated to remain shall be rolled, compacted to the density specified for the new base material to a stable state. Existing subgrade subbase that is exposed by the demolition work and will not need excavation shall be compacted to the density specified in plans Item P-152. The cost of compaction work shall be incidental to the item for pavement milling. removal

140-2.6 Reuse of Materials. Materials and equipment indicated to be reused or relocated shall be removed and stored to prevent damage and re-installed as the work progresses.

140-2.7 Items to be Salvaged. Materials and equipment to be removed that are indicated to remain the property of the Owner shall be removed, protected and delivered to a storage site on airport property as designated by the Engineer.

140-2.8 Dust and Debris Control. Contractor shall prevent the spread of dust and debris on airfield pavements and elsewhere and shall avoid creation of a nuisance or hazard in the surrounding area. Vacuum and sweep pavements as often as necessary to control the spread of debris that may result in FOD potential to aircraft.

140-2.9 Disposal of Demolished Materials.

a. Transport and legally dispose of all debris, rubbish and other demolished materials, daily, off airport property. Do not allow accumulations on airfield pavements or elsewhere on site.

Store materials that cannot be removed daily in areas designated by the Engineer.

b. If hazardous materials are encountered during demolition operations, comply with applicable regulations, laws, and ordinances concerning removal, handling and protection against exposure or environmental pollution.

c. Burning will not be permitted on airport property.

140-2.10 Clean-Up. Upon completion of demolition work, remove tools, equipment and demolished materials from site. Remove protections and leave areas clean and free of dust and debris.

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MEASUREMENT AND PAYMENT

140-3.1 General. The contract unit prices shall include the cost of removing the items, labor, tools, equipment, handling, hauling, stockpiling, disposal, re-installation, clean-up, and all incidental work required to complete the item.

a. Asphalt surface course and full depth asphalt pavement removal (including base course) will be measured and paid on a square yard basis which also will cover the cost of saw cutting and compaction of base course and subgrade as required.

b. Removal of storm drainage pipes will be measured and paid per linear foot for the various sizes and includes excavation, backfilling.

c. Removal of fencing will be measured and paid per linear foot and includes barbed wire topping and concrete foundations.

d. Miscellaneous demolition shall include the demolition and removal of existing miscellaneous items not specifically identified herein which are called out on the plans for removal. No direct measurement will be made for miscellaneous demolition.

Payment will be made under:

S-140-1 Tie-down Removal – Per Each

END OF ITEM S-140

H-15

Item S-141

Pavement Milling

DESCRIPTION

141-1.1 The work shall consist of milling asphalt pavements in accordance with these specifications and at locations and typical sections indicated on the drawings, or as directed by the Engineer.

EQUIPMENT

141-2.1 Cold Milling Machine. Shall be a self-propelled pavement profiler with sufficient power, traction, and stability to cold mill asphalt pavements. The milling machine shall be equipped with grade and slope control systems which will automatically control the longitudinal profile and cross slope of the milled surface to an accuracy of + 1/8-inch by the use of one or more sensors. The machine shall be capable of leaving a uniform surface without damage to the underlying pavement structure. The gross weight of the machine shall be sized and distributed to avoid overstressing or damaging the existing pavement structure or subgrade to remain. Conveyors shall be provided to transfer the milled material from the pavement to a truck.

141-2.2 Dust Control. The milling equipment shall be provided with dust control devices as needed to meet local, State, and Federal pollution control regulations.

141-2.3 Miscellaneous. Provide power brooms, hand brooms, shovels, vacuums, and other equipment as needed for final cleaning of milled surface and disposal of debris.

CONSTRUCTION REQUIREMENTS

141-3.1 Milling Operation. The existing pavement shall be milled to the indicated profile and cross section at the locations shown on the drawings. The Contractor may elect to make multiple cuts to achieve the depth of cut or cross slope required by the drawings.

141-3.2 Grade Control. The profile and cross slope of the milled surface shall be established by string lines and an automatic cross slope control mechanism. The milled pavement surface will be subject to visual and straightedge inspection. A 10-foot straightedge shall be maintained in the vicinity of the milling operation at all times for the purpose of measuring surface irregularities of the milled pavement surface. The straightedge and labor for its use shall be provided by the Contractor. All longitudinal irregularities in excess of 1/8-inch in 10 feet shall be remilled at no additional cost to the Owner, including the cost of any leveling material that may be needed.

The cross slope shall be uniform to a degree that no depressions or misalignment of slope greater than 1/4-inch in 10 feet are present when tested with a straightedge placed perpendicular to the centerline.

141-3.3 Protection. The milling operation shall proceed in such a manner as to prevent damage to the underlying pavement structure, utilities, drainage structures, light fixtures, paved surfaces outside the milled area, and any other appurtenances. The milled pavement surface shall be reasonably free of excessive scarification marks or other damage as determined by the Engineer. Any leveling or patching required as a result of negligence by the Contractor shall be repaired with hot asphalt plant mix at no cost to the Owner and in a manner acceptable to the Engineer. Manholes, inlets, light fixtures, utility lines, and other existing features damaged by the Contractor's operations shall be repaired or replaced at the expense of the Contractor.

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The Engineer may require re-milling any area where surface laminations or defects resulting from the Contractor's operations cause a non-uniform surface.

141-3.4 Clean-up. The milled pavement surface shall be thoroughly cleaned of all loose aggregate particles, dust, mill cuttings, and other objectionable material. Cuttings not immediately picked up during milling and removal operations shall be promptly removed by power brooming, vacuuming, blowing, or other means as necessary; this clean-up shall be done before traffic or construction equipment is allowed to recompact and rebond loose milling residue to the milled surface.

141-3.5 Dust and Hazard Control. The pavement removal operations shall be conducted to effectively control within regulations the amount of dust being emitted. The operation shall be planned and conducted so that it is safe for persons and property adjacent to the work including the traveling public.

141-3.6 Disposal. The material removed by means of milling shall become the property of the Contractor and shall be disposed of off airport property in an approved location.

METHOD OF MEASUREMENT

141-4.1 The quantity of milled asphalt pavements to be paid for will be the actual number of square yards of milled pavement surface approved, completed, and accepted. Milling in multiple cuts will be counted as one surface, not multiple surfaces.

BASIS OF PAYMENT

141-5.1 Milled pavement, measured as defined above, will be paid for at the contract unit price bid per square yard. Such payment shall be full compensation for all work covered by this section, including but not limited to milling the pavement, cleaning the milled surface, loading, hauling, and disposal of all milled material and for all materials, labor, equipment, tools, and incidentals necessary for satisfactory performance of the work.

Payment will be made under:

Item S-141 Refer to Bid Schedule

END OF ITEM S-141

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Item P-403

Asphalt Mix Pavement Leveling Course

DESCRIPTION

403-1.1 This item shall consist of pavement courses composed of mineral aggregate and asphalt binder mixed in a central mixing plant and placed on a prepared course in accordance with these specifications and shall conform to the lines, grades, thicknesses, and typical cross-sections shown on the plans. Each course shall be constructed to the depth, typical section, and elevation required by the plans and shall be rolled, finished, and approved before the placement of the next course.

MATERIALS

403-2.1 Aggregate. Aggregates shall consist of crushed stone, crushed gravel, crushed slag, screenings, natural sand and mineral filler, as required. The aggregates should have no known history of detrimental pavement staining due to ferrous sulfides, such as pyrite. Coarse aggregate is the material retained on the No. 4 (4.75 mm) sieve. Fine aggregate is the material passing the No. 4 sieve.

a. Coarse aggregate. Coarse aggregate shall consist of sound, tough, durable particles, free from films of matter that would prevent thorough coating and bonding with the asphalt material and free from organic matter and other deleterious substances. Coarse aggregate material requirements are given in the table below.

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Coarse Aggregate Material Requirements

Material Test Requirement Standard Resistance to Degradation Loss: 40% maximum for surface, asphalt binder, and leveling course Loss: 50% maximum for base course

ASTM C131

Soundness of Aggregates by Use of Sodium Sulfate or Magnesium Sulfate

Loss after 5 cycles:

12% maximum using Sodium sulfate - or - 18% maximum using magnesium sulfate

ASTM C88

Clay lumps and friable particles

1.0 % maximum ASTM C142

Percentage of Fractured Particles

For pavements designed for aircraft gross weights of 60,000 pounds (27200 kg) or more:

Minimum 75% by weight of particles with at least two fractured faces and 85% with at least one fractured face1

ASTM D5821

For pavements designed for aircraft gross weights less than 60,000 pounds (27200 kg):

Minimum 50% by weight of particles with at least two fractured faces and 65% with at least one fractured face1

Flat, Elongated, or Flat and Elongated Particles

8% maximum, by weight, of flat, elongated, or flat and elongated particles with a value of 5:1 2

ASTM D4791

Bulk density of slag3 Weigh not less than 70 pounds per cubic foot (1.12 Mg/cubic meter)

ASTM C29.

1 The area of each face shall be equal to at least 75% of the smallest mid-sectional area of the piece. When two fractured faces are contiguous, the angle between the planes of fractures shall be at least 30 degrees to count as two fractured faces.

2 A flat particle is one having a ratio of width to thickness greater than five (5); an elongated particle is one having a ratio of length to width greater than five (5).

3 Only required if slag is specified.

b. Fine aggregate. Fine aggregate shall consist of clean, sound, tough, durable, angular shaped particles produced by crushing stone, slag, or gravel and shall be free from coatings of clay, silt, or other objectionable matter. Natural (non-manufactured) sand may be used to obtain the gradation of the aggregate blend or to improve the workability of the mix. Fine aggregate material requirements are listed in the table below.

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Fine Aggregate Material Requirements

Liquid limit 25 maximum ASTM D4318 Plasticity Index 4 maximum ASTM D4318 Soundness of Aggregates by Use of Sodium Sulfate or Magnesium Sulfate

Loss after 5 cycles:

10% maximum using Sodium sulfate - or - 15% maximum using magnesium sulfate

ASTM C88

Clay lumps and friable particles 1.0 % maximum ASTM C142 Sand equivalent 45 minimum ASTM D2419 Natural Sand 0 to 15% maximum by weight of total aggregate

ASTM D1073

c. Sampling. ASTM D75 shall be used in sampling coarse and fine aggregate, and ASTM C183 shall be used in sampling mineral filler.

403-2.2 Mineral filler. Mineral filler (baghouse fines) may be added in addition to material naturally present in the aggregate. Mineral filler shall meet the requirements of ASTM D242.

Mineral filler Requirements

Plasticity Index 4 maximum ASTM D4318

403-2.3 Asphalt binder. Asphalt binder shall conform to ASTM D6373 Performance Grade (PG) 76-22.

Asphalt Binder PG Plus Test Requirements

Material Test Requirement Standard

Elastic Recovery 75% minimum ASTM D60841 1 Follow procedure B on RTFO aged binder.

403-2.4 Anti-stripping agent. Any anti-stripping agent or additive (anti-strip) shall be heat stable and shall not change the asphalt binder grade beyond specifications. Anti-strip shall be an approved material of the Department of Transportation of the State in which the project is located.

[ 403-2.5 Bond Breaker. [ Choke stone shall be an ASTM C33 Number 89 stone. ] [ Fabric shall meet the requirements of AASHTO M 288 Class I fabric with elongation not less than 50% at the specified strengths, and a weight not less than 14.5 oz/sy. A certificate of compliance (COC) shall be provided by the fabric manufacturer that the material may be used as a bond breaker. ] [ Liquid membrane forming compound shall be [ ].

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COMPOSITION

403-3.1 Composition of mixture. The asphalt plant mix shall be composed of a mixture of well-graded aggregate, filler and anti-strip agent if required, and asphalt binder. The several aggregate fractions shall be sized, handled in separate size groups, and combined in such proportions that the resulting mixture meets the grading requirements of the job mix formula (JMF).

403-3.2 Job mix formula (JMF) laboratory. The laboratory used to develop the JMF shall possess a current certificate of accreditation, listing D3666 from a national accrediting authority and all test methods required for developing the JMF, and listed on the accrediting authority’s website. A copy of the laboratory’s current accreditation and accredited test methods shall be submitted to the RPR prior to start of construction.

403-3.3 Job mix formula (JMF). No asphalt mixture shall be placed until an acceptable mix design has been submitted to the RPR for review and accepted in writing. The RPR’s review shall not relieve the Contractor of the responsibility to select and proportion the materials to comply with this section.

When the project requires asphalt mixtures of differing aggregate gradations and/or binders, a separate JMF shall be submitted for each mix. Add anti-stripping agent to meet tensile strength requirements.

The JMF shall be prepared by an accredited laboratory that meets the requirements of paragraph 403-3.2.

The asphalt mixture shall be designed using procedures contained in Asphalt Institute MS-2 Mix Design Manual, 7th Edition. Samples shall be prepared and compacted using a Marshall compactor in accordance with ASTM D6926. Samples shall be prepared and compacted using the gyratory compactor in accordance with ASTM D6925.

Should a change in sources of materials be made, a new JMF must be submitted to the RPR for review and accepted in writing before the new material is used. After the initial production JMF has been approved by the RPR and a new or modified JMF is required for whatever reason, the subsequent cost of the new or modified JMF, including a new control strip when required by the RPR, will be borne by the Contractor.

The RPR may request samples at any time for testing, prior to and during production, to verify the quality of the materials and to ensure conformance with the applicable specifications.

The JMF shall be submitted in writing by the Contractor at least 30 days prior to the start of paving operations. The JMF shall be developed within the same construction season using aggregates proposed for project use.

The submitted JMF shall be dated, and stamped or sealed by the responsible professional Engineer of the laboratory and shall include the following items as a minimum:

• Manufacturer’s Certificate of Analysis (COA) for the asphalt binder used in the JMF in accordance with paragraph 403-2.3. Certificate of asphalt performance grade is with modifier already added, if used and must indicate compliance with ASTM D6373. For plant modified asphalt binder, certified test report indicating grade certification of modified asphalt binder.

• Manufacturer’s Certificate of Analysis (COA) for the anti-stripping agent if used in the JMF in accordance with paragraph 403-2.4.

• Certified material test reports for the course and fine aggregate and mineral filler in accordance with paragraphs 403-2.1 and 403-2.2.

• Percent passing each sieve size for individual gradation of each aggregate cold feed and/or hot bin; percent by weight of each cold feed and/or hot bin used; and the total combined gradation in the JMF.

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• Specific Gravity and absorption of each course and fine aggregate.

• Percent natural sand.

• Percent fractured faces.

• Percent by weight of flat particles, elongated particles, and flat and elongated particles (and criteria).

• Percent of asphalt.

• Number of blows or gyrations.

• Laboratory mixing and compaction temperatures.

• Supplier recommended mixing and compaction temperatures.

• Plot of the combined gradation on the 0.45 power gradation curve.

• Graphical plots of air voids, voids in the mineral aggregate (VMA), and unit weight versus asphalt content. To achieve minimum VMA during production, the mix design needs to account for material breakdown during production.

• Tensile Strength Ratio (TSR).

• Type and amount of Anti-strip agent when used.

• Asphalt Pavement Analyzer (APA) results.

• Date the JMF was developed. Mix designs that are not dated or which are from a prior construction season shall not be accepted.

• Percentage and properties (asphalt content, asphalt binder properties, and aggregate properties) of reclaimed asphalt pavement (RAP) in accordance with paragraph 403-3.4, Reclaimed Hot-Mix Asphalt, if RAP is used.

Table 1. Asphalt Design Criteria

Test Property Value Test Method

Number of blows/gyrations 50 Air voids (%) 3.5 ASTM D3203

Percent voids in mineral aggregate (VMA), minimum See Table 2 ASTM D6995

TSR1 not less than 80 at a saturation of 70-80% ASTM D4867

[Asphalt Pavement Analyzer

(APA)2,3]

[Less than 10 mm @ 4000 passes ]

[AASHTO T340 at 250 psi hose pressure at 64°C test temperature] 1 Test specimens for TSR shall be compacted at 7 ± 1.0 % air voids. In areas subject to freeze-thaw, use freeze-thaw conditioning in lieu of moisture conditioning per ASTM D4867.

2 AASHTO T340 at 100 psi hose pressure at 64°C test temperature may be used in the interim. If this method is used the required Value shall be less than 5 mm @ 8000 passes 3 Where APA not available, use Hamburg wheel test (AASHTO T 324) 10 mm@ 20,000 passes at 50°C.

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The mineral aggregate shall be of such size that the percentage composition by weight, as determined by laboratory sieves, will conform to the gradation or gradations specified in Table 2 when tested in accordance with ASTM C136 and ASTM C117.

The gradations in Table 2 represent the limits that shall determine the suitability of aggregate for use from the sources of supply, be well graded from coarse to fine and shall not vary from the low limit on one sieve to the high limit on the adjacent sieve, or vice versa.

Table 2. Aggregate - Asphalt Pavements

Sieve Size Percentage by Weight Passing Sieve

1 inch 100 3/4 inch 90-100 1/2 inch 68-88 3/8 inch 60-82 No. 4 45-67 No. 8 32-54 No. 16 22-44 No. 30 15-35 No. 50 9-25 No. 100 6-18 No. 200 3-6 Voids in Mineral Aggregate (VMA)1 14

Asphalt Percent:

Stone or gravel 4.5 – 7.0 Slag 5.0-7.5

Recommended Minimum Construction Lift Thickness 3 inch 1To achieve minimum VMA during production, the mix design needs to account for material breakdown during production.

The aggregate gradations shown are based on aggregates of uniform specific gravity.