2223-085_PROJECT_TECHNICAL_SPECIFICATIONS.pdf

TECHNICAL SPECIFICATIONS

FOR

SIDEWALK INSTALLATION

HILLIARD STREET

BID NO. 22/23-085

TOWN OF MANCHESTER

GENERAL SERVICES DEPARTMENT

494 MAIN STREET

P.O. BOX 191

MANCHESTER, CT 06045-0191

TABLE OF CONTENTS

MOBILIZATION AND PROJECT CLOSEOUT ................................................................................... TS-1

CLEARING AND GRUBBING… ......................................................................................................... TS-2

EXCAVATION ....................................................................................................................................... TS-4

GRANULAR FILL . ............................................................................................................................... TS-8

BITUMINOUS CONCRETE PAVEMENT REPAIR… ........................................................................ TS-9

BITUMINOUS CONCRETE DRIVEWAY… ..................................................................................... TS-14

CONCRETE DRIVEWAY APRON .. .................................................................................................. TS-16

CONCRETE SIDEWALK AND CONCRETE SIDEWALK RAMPS… ............................................ TS-18

EXTRUDED CONCRETE CURB .. ..................................................................................................... TS-26

MISCELLANEOUS CONCRETE .. ..................................................................................................... TS-28

SEGMENTAL BLOCK RETAINING WALL .. .................................................................................. TS-33

CATCH BASINS AND STORM MANHOLES .. ................................................................................ TS-39

WATER MAIN .. .................................................................................................................................. TS-44

HYDRANT ASSEMBLY ..................................................................................................................... TS-63

REPLACE VALVE BOX .................................................................................................................... TS-70

EROSION AND SEDIMENTATION CONTROLS.. .......................................................................... TS-72

RESTORATION OF LAWN AND WETLAND AREAS AND EROS. CONTROL BLANKET.. ..... TS-76

RECTANGULAR RAPID FLASHING BEACON (SOLAR POWERED) ......................................... TS-83

TRAFFIC CONTROL SIGNS. ............................................................................................................. TS-86

PAVEMENT MARKINGS ................................................................................................................... TS-88

MAINTENANCE AND PROTECTION OF TRAFFIC. ...................................................................... TS-91

TRAFFICPERSON (UNIFORMED FLAGGERS). ........................................................................... TS-105

PROJECT FUNDING SIGN… ........................................................................................................... TS-106

MOBILIZATION AND PROJECT CLOSEOUT

MOBILIZATION AND PROJECT CLOSEOUT

DESCRIPTION

“Mobilization and Project Closeout” consist of all work necessary for moving project personnel and equipment to the project site; all work necessary for the establishment of the Contractors’ field offices, buildings and other facilities, if required, which are necessary for Contract performance; the preparation of work plans and other documents identified elsewhere in the

Contract that must be submitted by the Contractor prior to the start of physical construction;

demobilization of plant and equipment; completion of all physical work; and completion of administrative closeout items as required by the Contractor.

MEASUREMENT

“Mobilization and Project Closeout” will be measured for payment in accordance with Section

9.75.04 of the Form 818.

PAYMENT

The work under this item will be paid for at the Contract lump sum price for “Mobilization and

Project Closeout” which price shall include materials, equipment, tools, transportation, labor and all work incidental thereto. Payment for this item shall be made only once per project site as depicted on the Plans.

Pay Item Pay Unit

Mobilization and Project Closeout Lump Sum

TS-1

CLEARING AND GRUBBING

CLEARING AND GRUBBING

DESCRIPTION

“Clearing and Grubbing” includes the furnishing of all labor, equipment and materials and performing all operations in connection with the clearing and grubbing of trees, stumps, brush, rubbish and all objectionable material within the limits of work and where shown on the Plans.

The work also includes the proper disposal of all materials resulting from the clearing and grubbing operation away from the project area.

MATERIALS

Not Applicable

CONSTRUCTION DETAILS

Clearing shall include the felling, cutting up and stacking of all trees to four-foot lengths and the satisfactory removal and disposal of trees, bushes, downed timber, brush and debris and obstructions of any nature. Individual trees shown on the Plans or directed by the Engineer to be left standing shall be protected in a satisfactory manner to prevent damage incidental to construction operations.

The Contractor shall mark all trees, shrubs and plants to be removed in accordance with the

Plans and Specifications at least seven (7) days prior to removal. The Engineer shall field review the markings and make any adjustments prior to the clearing operation.

For all trees to be removed from within the Town of Manchester right-of-way, the Contractor shall obtain a “Tree Removal” permit from the Town Tree Warden and comply with all of the requirements of such permit, which includes posting notices on these trees for a minimum of ten

(10) days.

Grubbing shall include the satisfactory removal and disposal of all stumps, roots larger than one inch in diameter, matted roots, debris, surface boulders 6" or larger and other obstructions to a depth not less than 18 inches below finish ground grades, except that in areas to be occupied by structures they shall be removed in their entirety. Stumps shown to be removed on the plans shall be removed by grinding, or other method approved in writing by the Engineer. All depressions resulting from grubbing shall be refilled with selected materials from earth excavation and/or approved off-site sources graded and compacted so as to conform to adjacent ground surfaces at no additional cost to the Town.

The limits of clearing and grubbing shall typically match the limits of disturbance for proposed work unless such work can be completed without disturbing the trees as determined by the

Engineer.

The Contractor shall protect all existing trees, shrubs and landscaping, fences, mailboxes, utility poles, signs, sidewalks, driveways and pavements that are to remain. The Contractor shall repair, reset or replace these items as designated by the Engineer at no additional cost. Track type vehicles shall not be allowed on existing pavement areas. Any disturbance of lawn areas

TS-2

CLEARING AND GRUBBING

CLEARING AND GRUBBING

outside of the clearing limits shall be restored to pre-construction condition and shall not be measured for payment.

“Clearing and Grubbing” will be measured for payment by the lump sum. The lump sum price shall include all the work as described above which may be necessary to properly complete the project. Should the project area be increased in length or the scope of work increased due to construction changes beyond the requirements hereinabove, any additional clearing and grubbing work required will be paid for as extra work. Should the project be decreased in length, a suitable credit, mutually agreed upon and based on the reduction in actual work or scope, will be taken by the Town. The disposal of trees, stumps, etc., will not be measured separately for payment, but its cost shall be considered included in the lump sum price bid for “Clearing and

Grubbing”.

Payment for this work will be at the contract lump sum price for “Clearing and Grubbing”, which price constitutes full compensation for all labor, equipment, tools, supplies, materials, handling, hauling, removal, disposal and work incidental and necessary to complete the clearing and grubbing operation, all in accordance with the provisions of the Plans and Specifications and as directed by the Engineer.

Mailboxes impacted by the proposed construction shall be reset by the Contractor as directed by the Engineer and payment for all associated work shall be included in this item.

Clearing and Grubbing Lump Sum

TS-3

EXCAVATION

EXCAVATION

DESCRIPTION

“Earth Excavation” shall consist of the removal and satisfactory disposal of all material taken from the area between existing ground and the finished grade of new sidewalk, driveway or slope, and between existing ground surface and the subgrade elevation within the limits of full-depth road reconstruction shown on the Contract Plans (i.e. bottom of proposed processed aggregate base material). Excavation below the finished grade of new sidewalk, driveway or slope necessary to install new sidewalk, driveway or slope is included in the unit price bid for

“Concrete Sidewalk,” “Bituminous Concrete Driveway” or “Restoration of Lawn Areas” of the type specified.

“Rock Excavation” shall consist of the removal and satisfactory disposal of rock in definite ledge formation and boulders, or the portion of boulders, one cubic yard or more in volume, within the excavation limits as described in “Earth Excavation” above.

“Ditch Excavation” shall consist of the removal and satisfactory disposal of all material taken from the area between existing ground and the finished grade of a new ditch.

Trench excavation for new culverts, sanitary sewers and laterals, water mains and services, underdrains or conduit is included in the unit price bid for “Culvert”, “Sanitary Sewer”, “Sanitary Sewer Lateral”, “Water Main, “Water Service”, “Underdrain” or “Conduit” of the size and type specified.

“Rock in Trench Excavation” shall consist of the removal and satisfactory disposal of rock in definite ledge formation and boulders, or the portion of boulders, one cubic yard or more in volume, within the trench excavation limits.

Excavation for light standards and traffic control foundations is included in the unit price bid for

“Light Standard Foundation” or “Traffic Control Foundation” of the type specified.

“Rock in Foundation Excavation” shall consist of the removal and satisfactory disposal of rock in definite ledge formation and boulders, or the portion of boulders, one cubic yard or more in volume, within the foundation excavation limits for light standards and traffic control foundations.

“Test Pit Excavation” shall consist of the careful excavation to determine the horizontal and vertical location and size and material of an existing underground utility where shown on the plans or as directed by the Engineer.

Excavation shall be made in conformance to the limits and grades shown on the plans.

Excavation beyond the limits shown on the plans will not be measured for payment. Topsoil, sod and other organic matter shall be removed and disposed of.

TS-4

EXCAVATION

When bedrock is encountered, it shall be excavated to the slope lines and depths indicated on the plans. All loose and unstable material shall be removed and disposed of. Any blasting shall conform to applicable local, State and Federal laws and regulations. The Contractor shall be responsible for all damage due either directly or indirectly to such operation.

All excavated material obtained within the project limits shall be used in the formation of embankments. Embankments shall be constructed of earth only. No bituminous concrete or reclaimed waste shall be used in the embankment. The material shall be free from refuse, stumps, roots, rocks, brush, weeds or other unsuitable material.

The depth of each layer, before compaction, shall not exceed twelve inches (12”). The embankment shall be crowned or pitched to provide drainage at the close of each day’s operation.

The entire embankment area shall be leveled off by suitable grading equipment and shall be compacted to at least the required minimum density by use of compaction equipment consisting of rollers, compactors or a combination thereof. The dry density after compaction shall not be less than 95 percent of the dry density for that soil when tested in accordance with AASHTO

T180, Method D. Each layer shall be compacted at optimum moisture.

All surplus excavated material shall become the property of the Contractor and disposed of off of the project site unless otherwise directed by the Engineer.

Earth slopes shall be tracked by traversing the slopes with cleated tracks so that the cleat indentations are horizontal. Tracking shall be completed prior to placing topsoil. After all grading for the roadbed has been substantially completed and all drains installed, the subgrade shall be brought to the lines, grades and cross-sections shown on the plans. No particle over 3” shall in its greatest dimension be placed within 12” below the top of the prepared subbase.

All soft and yielding material within the subgrade shall be removed and replaced with suitable material. Compaction shall be as specified in Section 2.02 of Form 817. The Contractor shall protect the completed subgrade from damage. The subgrade shall be checked and approved by the Engineer prior to placing pavement structure thereon.

For test pit excavation, the Contractor shall follow all the requirements of “Call Before You

Dig”, including requesting utility markouts and hand-digging in the vicinity of the underground utility. The Contractor shall notify the Engineer 48 hours in advance of digging the test pit so the Engineer and the appropriate utility representative may be present.

Prior to excavation, the Contractor and Engineer shall agree on the exact location of the test pit based upon available mapping and the utility markout. The Contractor shall adjust the limits of excavation as needed to successfully locate the utility.

Horizontal and vertical locations and size and material of utilities must be obtained during test pit excavation and provided to the Engineer for review. Horizontal utility locations shall be

TS-5

EXCAVATION

field-surveyed or field-measured with a minimum of two (2) swing-ties from fixed physical features identified on the plans. Vertical utility elevations shall be field-surveyed using a level or other related equipment to provide elevation to the nearest hundredth of a foot (0.01’). The

Contractor is made aware that additional test pits may be required and the proposed design may be modified based on results of test pit information obtained.

“Earth Excavation” is considered a “Final Pay” item (i.e. the quantity will not be measured for payment but the quantity used for payment purposes will be that shown in the Bid Proposal.)

No changes to the quantity shown in the Bid Proposal will be made unless significant changes to the proposed grading are directed by the Engineer. In the case of significant grading changes directed by the Engineer, the quantity shown in the Bid Proposal shall be used as the baseline quantity and agreed measured changes shall be added or subtracted from the baseline quantity.

“Rock Excavation” and “Rock in Trench Excavation” shall be measured for payment by the cubic yard. Payment lines for “Rock Excavation” and “Rock in Trench Excavation” shall coincide with the slope and grade lines as shown on the plans in areas where rock is encountered.

The payment lines will be based on a predetermined limit as mutually agreed to by the Engineer and Contractor. Prior to any rock excavation, the Engineer and Contractor shall survey the conditions and agree on the payment limits for each item. In no case will the payment limits extend beyond the lines and grades shown on the plans and cross sections.

“Ditch Excavation” shall be measured for payment by the cubic yard. Payment lines for “Ditch

Excavation” shall coincide with the slope and grade lines as shown on the plans. The stockpiling, re-excavation and final placement of material will not be measured for payment.

The amount of excavation will be determined by the average end area method.

“Rock in Foundation Excavation” shall be measured for payment by the vertical foot. The payment lines will be based on a predetermined limit as mutually agreed to by the Engineer and

Contractor. Prior to any rock excavation, the Engineer and Contractor shall survey the conditions and agree on the payment limits for each item.

“Test Pit Excavation” shall be measured for payment by the cubic yard.

Trench excavation for culverts, sanitary sewers, sanitary sewer laterals, water mains, water services, underdrains and conduits will not be measured for payment; its costs shall be considered as included in the cost for the appropriate item herein.

Excavation for sidewalk, driveway and slope will not be measured for payment; its costs shall be considered as included in the cost for the appropriate item herein.

Payment for “Earth Excavation”, “Ditch Excavation”, “Rock Excavation” and “Rock in Trench

Excavation” will be made at the contract unit price bid per cubic yard for each item subject to the

TS-6

EXCAVATION

method of measurement above. The prices shall constitute full compensation for all equipment, tools, and labor incidental to the completion of the excavation, the formation and compaction of embankments, the formation and compaction of subgrades, and the disposal of surplus or unsuitable material in accordance with these Specifications.

Payment for “Rock in Foundation Excavation” will be made at the contract unit price bid per vertical foot subject to the method of measurement above. The price shall constitute full compensation for all equipment, tools, and labor incidental to the completion of the excavation, the disposal of surplus material in accordance with these Specifications and the furnishing of any additional concrete required to fill the excavation beyond the designated foundation hole dimensions.

Payment for “Test Pit Excavation” will be made at the contract unit price bid per cubic yard for each item subject to the method of measurement above. The prices shall constitute full compensation for all equipment, tools, and labor incidental to the completion of the excavation and location of utilities as indicated herein, and the backfill and compaction of the excavation to restore the ground surface to the original condition in accordance with these Specifications.

Earth Excavation Cubic Yard

TS-7

GRANULAR FILL

GRANULAR FILL

DESCRIPTION

“Granular Fill” includes the furnishing and installation of material to be used as a foundation for structures, to replace unstable material in slopes and shoulders, to replace rock and unsuitable material in trenches, and elsewhere as indicated on the Plans or Specifications or where directed by the Engineer. It shall consist of gravel conforming to the requirements of these specifications.

Granular fill shall conform to the requirements of Section M.02.01 of Form 818.

When granular fill is used for foundation for structures, as backfill or to replace rock or unsuitable material in trenches, it shall be deposited in layers not over six (6) inches in depth, with each layer thoroughly compacted before the addition of other layers.

Only granular fill used to replace unsuitable material and rock in trenches or other areas directed by the Engineer will be measured for payment. It will be measured in place by the cubic yard after compaction within the payment lines shown or specified by the Engineer.

This work will be paid for at the contract unit price per cubic yard for "Granular Fill", complete in place, which price shall constitute full compensation for all materials, tools, equipment and labor incidental thereto.

Granular Fill Cubic Yard

TS-8

BITUMINOUS CONCRETE PAVEMENT REPAIR

BITUMINOUS CONCRETE PAVEMENT REPAIR

DESCRIPTION

“Permanent Pavement Repair” shall consist of the constructing a full depth pavement repair in an existing roadway of the classification specified where shown on the Plan or where directed by the Engineer. The surface course pavement structure shall consist of bituminous concrete constructed on a prepared stabilized base and in accordance with lines, grades as shown on the

Plans, or as directed by the Engineer. It shall also include all excavation, furnishing, installing and compacting of processed aggregate base, sawcutting the existing pavement as required, and the resetting of storm drainage and utility structures and any pavement surrounding these structures.

“Temporary Pavement Repair” shall consist of the constructing a pavement repair in an existing roadway of the classification specified for temporarily repairing all pavement cuts and other pavement areas specified by the Engineer. The surface course pavement structure shall consist of bituminous concrete constructed on a prepared stabilized base and in accordance with lines, grades as shown on the Plans, or as directed by the Engineer. It shall also include all excavation, furnishing, installing and compacting of processed aggregate base, sawcutting the existing pavement, and the resetting of storm drainage and utility structures and any pavement surrounding these structures.

Bituminous Concrete shall conform to the requirements of Section M.04 of Form 818.

All materials will be supplied from a plant certified and approved by the State of Connecticut, Department of Transportation.

Processed aggregate base shall conform to the specification for “Processed Aggregate Base” elsewhere in these Specifications.

If it is found that any Bituminous Mixture, even though meeting the requirements of the Job Mix

Formula, fails to perform satisfactorily, the producer shall on notice (1) immediately cease furnishing the material, (2) take immediate corrective steps to provide a mix which does perform satisfactorily.

When bituminous concrete is laid, only material conforming to the requirements of these specifications and approved by the Engineer shall be used in the work. If tests of samples removed from the work reveal that the mixture is inconsistent or that other than approved materials have been incorporated in the mixture, or that the mixture is not in accordance with the specifications and the product proves unsatisfactory, the Town reserves the right to demand the replacement of the unsatisfactory bituminous concrete. All expenses of the Town incidental to such replacement, including all costs incurred in putting the road in satisfactory condition, shall be paid by the Contractor.

The tack coat to be used on all cold joints shall conform to the requirements of Section M.04 of

Form 818.

TS-9

Transportation of Mixtures: The mixture shall be transported from the paving plant in trucks having tight bodies, which have previously been cleaned of all foreign material. The use of kerosene, gasoline, fuel or similar products for the coating of the inside of truck bodies is strictly prohibited. Such coatings may consist of soapy water or commercial oil emulsions (also known as soluble oils) in the proportion of one (1) part oil to six (6) parts water. When such coatings are applied, truck bodies shall be raised immediately prior to loading to remove any excess coating material. Loaded trucks shall be covered with waterproof canvas or other suitable covers.

The mixture shall be delivered at a temperature within -4 degrees Celsius (25 degrees

Fahrenheit) of the approved job mix formula.

Paving Equipment: The paving machine to be used shall be a self-powered type with an adapter to provide guidance of the screeding action. The screed or strike-off member shall be adjustable to the shape of the cross section of the existing pavement. Some method shall be provided for the tilting of the screed while in operation to secure the proper "pulling" and to result in a uniformly screeded surface. The machine shall have sufficient number of driving wheels so that there will be no undue amount of slippage. Means shall be provided for heating the screeding members by some method that will prevent accumulations of bituminous materials.

Placement of Mixture: The areas to be repaired shall be sawcut and the existing pavement and base material removed to the depth shown on the Plan. The excavated area shall then be filled with processed aggregate base to the depth identified on the Plans and shall be installed and compacted in maximum 6” lifts.

The mixture shall be laid only when the surface is free of frost, dried to the satisfaction of the

Engineer, and when the weather is not foggy or rainy. Operations shall be carried only when the atmospheric temperature in the shade is not less than 4 degrees Celsius (40 degrees Fahrenheit) unless approval is given by the Engineer. Upon arrival, the mixture shall be immediately spread and struck-off to the width required and to such appropriate loose depth so that the compacted pavement will conform to the specified depth.

In order to obtain tight and well-compacted longitudinal joints, the sequence of the bituminous concrete placing operations shall be subject to the control of the Engineer.

Before any compaction is started, the surface shall be checked and inequities adjusted; all

“drippings,” i.e. fat, sandy accumulations, and all fat spots from any source, shall be removed and replaced by satisfactory material.

In areas where, on account of physical limitations, it is impractical to operate the paving equipment, the Engineer will permit the use of other type spreader or the mixture may be spread and screeded by hand.

TS-10

The Contractor shall cut to the limits of the area to be repaired a minimum of 150 mm (six (6) inches) beyond each side of the disturbed area or into the existing pavement with a cutting saw.

The saw cut shall be vertical and in straight lines. After the pavement has been removed to a depth of 450 mm (eighteen (18) inches) below the existing pavement surface, the roadway base shall be installed, graded and compacted in accordance with the specification for “Processed

Aggregate Base”. The roadway base shall be placed in layers not to exceed 150 mm (six (6) inches) in depth and to such a depth that after compaction it shall be at the specified depth shown on the plans. Contact surfaces of curbing, manholes, etc. shall be painted with a thin uniform coat of hot asphalt cement or tack coat just before the material is placed against them. Such asphalt cement or tack coat shall not be paid for. Hot-laid bituminous concrete shall be placed evenly and uniformly to a minimum compacted thickness of six (6) inches. The maximum thickness to be placed per course shall be two (2) inches. Immediately before placing the mixture, the road surface shall be cleaned by brooming or as otherwise directed by the Engineer.

Refueling of equipment in such a position that fuel might be spilled on bituminous concrete mixtures already placed or to be placed is prohibited.

Solvents and cleaners for use in cleaning mechanical equipment or hand tools shall be stored well clear of areas paved or to be paved.

Compaction: After spreading and when sufficient set has developed to permit proper compaction, each course shall be compacted by rolling, consisting of initial or breakdown rolling, intermediate rolling and final or finish rolling. Initial rolling shall be performed with a power driven steel wheel tandem or three wheel rollers weighing not less than ten (10) tons.

Intermediate rolling shall be done by a power driven steel wheel tandem roller. Final rolling shall be done with a self-propelled pneumatic tire roller equipped with Wide-tread compaction tires capable of exerting an average contact pressure from 60 to 90 pounds per square inch uniformly over the surface, adjusting ballast and tire inflation pressure as required. The

Contractor shall furnish evidence regarding tire size, pressure and loading to confirm that the proper contact pressure is being developed and that the loading and contact pressure are uniform for all wheels.

Rolling shall begin at the sides and progress toward the center, parallel to the centerline of the roadway. Alternate trips of the roller shall be terminated in stops at least three feet distant from any preceding stop.

Other rolling procedures may be directed by the Engineer, as conditions may require. Rolling shall be discontinued if the surface shows signs of excessive cracking or displacement and shall be continued later as directed. If it is found that the cracking and displacement continues, the paving operation shall be discontinued until the cause of the condition is corrected.

Rolling shall proceed continuously and in such a manner that all roller marks are eliminated.

The rollers shall be in good condition. They shall be operated by experienced roller operators and must be kept in continuous operation as nearly as practicable in such manner that all parts of the pavement shall receive substantially equal compression.

TS-11

In no case shall the Contractor use methods or equipment, which will result in fractured aggregate or lateral displacement of the material.

In all places inaccessible to a roller, such as adjacent to curbs, headers, gutters, and manholes, the required compression shall be secured with tamps. Depressions which may develop before the completion of the rolling shall be remedied by adding new material to bring such depressions to a true surface. Should any depressions remain after the final compaction has been obtained, new material shall be added to form a true and even surface. All high spots, high joints and other defects shall be adjusted as directed by the Engineer.

Placing of the pavement shall be as nearly continuous as possible and the roller shall pass over the unprotected end of the freshly laid mixture only when laying of the pavement is discontinued or interrupted for an appreciable period and joints shall be formed at such point. Where joints are to be formed, the edge of the existing pavement shall be cut square with the pavement.

Before new material is laid, a thin coating of hot asphalt shall be applied to the vertical face of the cut pavement.

Depressions which may develop after initial rolling shall be remedied by scarifying the surface mixture laid and adding new material to bring such depressions to a true surface.

For permanent pavement repairs, all joints between new and existing pavements shall be sealed with an approved liquid bituminous concrete sealer material.

Protection of the Work: Sections of the newly finished bituminous work shall be protected from traffic to prevent damage to the finished mat.

“Permanent Pavement Repair” will be measured by the actual number of square yards of bituminous concrete pavement repair completed and accepted in accordance with pay limits identified in the associated details on the Contract Plans. Excavation, asphalt emulsion tack coat, joint seal material, formation and compaction of subgrade, installation and compaction of processed aggregate base, sawcutting the existing pavement and bituminous concrete pavement shall not be measured for payment; these costs shall be considered as included in the unit price bid for “Permanent Pavement Repair”.

“Temporary Pavement Repair” of the type specified will be measured for payment by the actual number of square yards of bituminous concrete pavement repair installed and accepted in accordance with pay limits identified in the associated details on the Contract Plans. Asphalt emulsion tack coat, formation and compaction of subgrade, installation and compaction of processed aggregate base, and sawcutting the existing pavement shall not be measured for payment; these costs shall be considered as included in the unit price bid for “Temporary

Pavement Repair” of the type specified.

TS-12

BITUMINOUS CONCRETE PAVEMENT REPAIR

Due to existing pavement conditions in some areas, the Engineer may direct the Contractor to construct wider pavement repairs to provide suitable joints between new and existing pavement, which shall be measured and paid for in accordance with this Specification.

The work will be paid for at the contract unit price per square yard for “Permanent Pavement

Repair” complete and in place, to the pay limits and dimensions as shown on the plans and details, including all material, labor, tools and equipment incidental to the completion of the work and resetting of all storm basins, manholes and utility structures including any pavement around the structures. It shall include all excavation, asphalt emulsion tack coat, formation and compaction of subgrade, installation and compaction of processed aggregate base, sawcutting the existing pavement and bituminous concrete pavement.

The work will be paid for at the contract unit price per square yard for “Temporary Pavement

Repair” of the type specified complete and in place, to the pay limits and dimensions as shown on the plans and details, including all material, labor, tools and equipment incidental to the completion of the work and resetting of all storm basins, manholes and utility structures including any pavement around the structures. It shall include all asphalt emulsion tack coat, formation and compaction of subgrade, installation and compaction of processed aggregate base, and sawcutting the existing pavement.

Due to existing pavement conditions in some areas, the Engineer may direct the Contractor to construct wider pavement repairs to provide suitable joints between new and existing pavement, which shall be measured and paid for in accordance with this Specification.

Permanent Pavement Repair (Collector Road) Square Yard

Temporary Pavement Repair (Collector Road) Square Yard

TS-13

BITUMINOUS CONCRETE DRIVEWAY

BITUMINOUS CONCRETE DRIVEWAY

DESCRIPTION

“Bituminous Concrete Driveway” includes the construction of a bituminous concrete surfaced driveway or driveway apron, constructed on a processed aggregate base course in the locations and to the dimensions and details shown on the Plans, as directed by the Engineer and in accordance with these Specifications.

Processed Aggregate Base shall conform to the requirements of “Processed Aggregate Base”

Bituminous concrete shall meet the requirements of Section M.04, HMA S0.375, of Form 817.

Tack coat to be used on all cold joints shall conform to the requirements of Section M.04.01.5 of

Form 817.

Joint seal shall conform to the requirements of Section M.04.01.8 of Form 817.

1. Excavation: Excavation, including removal of any existing sidewalk, driveway, or driveway apron shall be made to the required depth below the finished grade, as shown on the Plans or as directed by the Engineer. All soft and yielding material shall be removed and replaced with suitable material.

2. Forms: When the bituminous concrete is spread by hand, forms shall be used. Forms shall be of metal or wood, straight, free from warp and of sufficient strength to resist springing from the impact of the roller. If of wood, they shall be of two (2) inch surfaced plank except that at sharp curves thinner material may be used; if of metal, they shall be of an approved section. All forms shall be of a depth equal to the depth of the sidewalks or driveways and shall be securely staked, braced, and held firmly to the required line and grade. All forms shall be cleaned and oiled each time they are used.

3. Base Course: Processed Aggregate Base for the base course shall be uniformly spread upon the subgrade to the required depth and thoroughly compacted with a roller weighing not less than 500 pounds.

4. Bituminous Concrete Surface: This surface shall be constructed in accordance with the requirements of Section 4.06 of Form 817, except that the material may be spread by hand and thoroughly compacted by multiple passes of a roller weighing not less than 500 pounds.

5. Backfilling and Removal of Surplus Material: The sides of the driveway or apron shall be backfilled with suitable material and thoroughly compacted and finished flush with the top of the driveway. All surplus material shall be removed and the site left in a neat and presentable condition to the satisfaction of the Engineer. In sections inaccessible to the

TS-14

BITUMINOUS CONCRETE DRIVEWAY

BITUMINOUS CONCRETE DRIVEWAY

roller, the base course, surface course and backfill shall be hand-tamped with tampers weighing not less than 12 pounds, the face of which shall not exceed 50 square inches in area.

6. Where a joint is formed, the old pavement shall be sawcut square with the pavement in a vertical and horizontal direction. The exposed edge shall receive a thin coating of RS-1 or other approved bitumen. The joint between the new and old pavement shall be sealed with an approved joint sealant.

“Bituminous Concrete Driveway” will be measured by the actual number of square yards of

“Bituminous Concrete Driveway” constructed and accepted.

The following items will not be measured separately for payment, but shall be considered as included in the unit price bid for “Bituminous Concrete Driveway”:

1. Excavation

2. Processed Aggregate Base

3. Removal and disposal of existing sidewalks or pavement within the driveway or apron excavation limits

4. Tack Coat

5. Sawcutting

6. Joint Sealant

This work will be paid for at the contract unit price for “Bituminous Concrete Driveway”, which price shall constitute full compensation for excavation, removal and disposal of existing sidewalk or driveway, sawcutting, processed aggregate base, formation of subgrade, tack coat, joint seal, and all materials, equipment and labor necessary to complete the work as specified on the Plans or as directed by the Engineer.

Driveways damaged due to carelessness on the part of the Contractor shall be restored by the

Contractor, as directed by the Engineer, at no expense to the Town.

Item Pay Unit

Bituminous Concrete Driveway Square Yard

TS-15

CONCRETE DRIVEWAY APRON

CONCRETE DRIVEWAY APRON

DESCRIPTION

“(Size) Concrete Driveway Apron” includes the construction of concrete driveways and concrete driveway aprons on a prepared processed aggregate base in the locations and to the dimensions and details shown on the Plans, as directed by the Engineer, and in accordance with these

Specifications.

Portland cement, fine and coarse aggregate, air-entraining admixtures and water shall conform to the requirements of Section M.03.01 of Form 817 for Class “F” Concrete.

Processed aggregate base shall conform to the requirements of “Processed Aggregate Base”

Reinforcement shall conform to the requirements of Section M.06.01 of Form 817 for concrete pavement.

Granite stone transition curb and associated concrete and mortar shall conform to the requirements of “Granite Stone Curb” elsewhere in these Specifications.

Construction methods shall conform to the requirement of the Item, “Concrete Sidewalk and

Concrete Sidewalk Ramps”. The surface shall be finished and marked off as directed. The driveways shall be reinforced as indicated on the Plans. The concrete shall contain not less than five (5) nor more the seven (7) percent entrained air at the time the concrete is deposited in the forms.

The Contractor shall sawcut the existing pavement and excavate as necessary to perform the work under this item as shown on the Plans.

Curb transitions shall be provided when concrete driveway aprons are adjacent to existing and proposed curb. Granite stone curb transitions shall be provided adjacent to granite curb and concrete curb transitions shall be provided adjacent to concrete curb and bituminous concrete curb unless approved otherwise by the Engineer.

“(Size) Concrete Driveway Apron” will be measured for payment by the actual number of square feet of completed and accepted concrete driveway and concrete driveway apron.

included in the unit price bid for “Concrete Driveway Apron”:

1. Excavation

2. Sawcutting of existing concrete or bituminous surface

3. Processed Aggregate Base

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CONCRETE DRIVEWAY APRON

CONCRETE DRIVEWAY APRON

4. Curb transitions

5. Dowels and other reinforcement

6. Removal of existing sidewalks, ramps, driveway or roadway within the driveway excavation limits

This work will be paid for at the contract unit price per square foot for “(Size) Concrete

Driveway Apron” of the type specified, complete in place, which price shall include excavation, sawcutting, removal and disposal of existing driveway and/or sidewalk, concrete, reinforcement, granite stone or concrete curb transitions, formation of subgrade and all materials, equipment, tools and labor incidental thereto.

6” Concrete Driveway Apron Square Foot

8” Concrete Driveway Apron Square Foot

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CONCRETE SIDEWALK AND CONCRETE SIDEWALK RAMPS

CONCRETE SIDEWALKS AND CONCRETE SIDEWALK RAMPS

DESCRIPTION

“Concrete Sidewalk” of the thickness specified includes the construction of concrete sidewalk on a prepared processed aggregate base course in conformance with the lines, grades, dimensions and details as shown on the Plans, or as directed by the Engineer. It shall also include the sawcutting, removal and disposal of existing sidewalk, steps, ramps or pavement within the excavation limits for “Concrete Sidewalk”.

“Concrete Sidewalk and Curb Monolithic” of the thickness specified includes the construction of concrete curb and sidewalk, monolithically poured, on a prepared processed aggregate base course in conformance with the lines, grades, dimensions and details as shown on the Plans, or as directed by the Engineer. It shall also include the sawcutting, removal and disposal of existing sidewalk, steps, ramps or pavement within the excavation limits for “Concrete Sidewalk and

Curb Monolithic”.

“Reinforced Concrete Sidewalk” of the thickness specified includes the construction of concrete sidewalk reinforced with welded wire fabric on a prepared processed aggregate base course in conformance with the lines, grades, dimensions and details as shown on the Plans, or as directed by the Engineer. It shall also include the sawcutting, removal and disposal of existing sidewalk, steps, ramps or pavement within the excavation limits for “Reinforced Concrete Sidewalk”.

“Concrete Sidewalk Ramp” of the thickness specified includes the construction of a concrete ramp on a prepared processed aggregate base course in conformance with the lines, grades, dimensions and details as shown on the Plans, or as directed by the Engineer. It shall also include the sawcutting, removal and disposal of existing sidewalk, steps, ramps or pavement within the excavation limits and installation of Town-furnished detectable warning tiles for

“Concrete Sidewalk Ramp”.

1. Concrete

a. The concrete furnished shall conform in respects to composition, transportation, mixing and placing to Class “F” Concrete as specified in Section M.03 of Form

817 or as modified herein.

b. Test concrete in accordance with AASHTO or ASTM Standard Test Methods as listed herein.

c. All concrete mixes shall include air entraining and water reducing admixtures and, as needed, a retarder or accelerator. All admixtures must be on the

Connecticut DOT approved list.

d. Entrained air contents shall be maintained as follows:

Nominal Max Average Air

Aggregate Size Content

3/8" 7.5%

" 7.0%

3/4" 6.0%

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CONCRETE SIDEWALKS AND CONCRETE SIDEWALK RAMPS

A range of 1.5% from the required average is permissible for field tests.

Slump at the point of placement shall be 4" 1".

e. No additional materials will be added to the concrete mix at the job site without the prior approval of the Engineer.

2. Reinforcing

a. Welded Wire Mesh: WWM shall be used in all driveways and specified sidewalk locations. The WWM shall be W1.4xW1.4 and conform to the latest AASHTO

M 55M/M 55 “Standard Specifications for Welded Steel Wire Fabric for Concrete

Reinforcement.”

Written requests may be made to substitute synthetic fibers such as Fibermesh or approved equal for welded wire mesh with written approval of the Engineer. The addition rate shall be 1.5 lb/cu yard.

b. Smooth Metal Dowels: Smooth metal dowels shall be ⅝" in diameter and 18 inches in length. All metal dowels shall conform to the requirements of

AASHTO M31-92, Grade 60.

c. Deformed Bars: Deformed bars shall conform to AASHTO M31-92, Grade 60.

d. Bond breaker shall be Reed Wax #100 Emulsion as manufactured by Roger A.

Reed, Inc., Reading, MA (1-781-944-4640) or approved equal.

3. Construction/Isolation Joint Material

Joint material shall be one-half () inch in thickness, equal in width to the slab thickness and conform to AASHTO M33, Asphaltic Expansion Joint Materials.

4. Forms

The forms used shall be straight and firmly supported and staked to the line and grades as shown on the plans or as directed by the Engineer. The forms shall be free from warp and shall be of sufficient strength to resist springing out of shape. All forms shall be cleaned and oiled before use.

5. Curing Materials

A liquid membrane curing compound such as Masterkure by Master Builders or approved equal and meeting AASHTO M148 shall be applied in accordance with the manufacturer’s instructions over the completed concrete surface area.

6. Processed Aggregate Base

Processed aggregate base shall conform to the requirements of “Processed Aggregate

Base” elsewhere in these Specifications.

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CONCRETE SIDEWALKS AND CONCRETE SIDEWALK RAMPS

7. Granite Stone Transition Curb

Granite stone transition curb and associated concrete and mortar shall conform to the requirements of “Granite Stone Curb” elsewhere in these Specifications.

8. Detectable Warning Tiles

Prefabricated detectable warning tiles will be furnished by the Town.

1. Excavation

Excavation, including the removal and disposal of any type of existing sidewalk, curb, ramp, steps or pavement, shall be made to the required depths below the finished grade as shown on the plans or as directed. All soft and yielding material shall be removed and replaced with suitable material.

2. Processed Aggregate Base

The base course shall be placed in layers not to exceed six inches (6”) in depth and to such a depth that after compaction it shall be at the specified depth below the finished grade of the walk.

3. Forms

Forms shall be straight, free from warp and of sufficient strength to resist springing from the pressure of the concrete. Forms shall be of minimum 5” depth and shall have a flat surface on the top. Forms shall be securely staked, braced and held firmly to the required line and grade and shall be sufficiently tight to prevent leakage of mortar. All forms shall be cleaned and oiled or wetted before concrete is placed against them. Sheet metal templates one-eighth (⅛) inch in thickness, of the full depth and width of the walk, shall be spaced at intervals of fifteen feet (15’) or as directed by the Engineer. If the concrete is placed in alternate sections, these templates shall remain in place until concrete has been placed on both sides of the template. As soon as the concrete has obtained its initial set, the templates shall be removed.

4. Joints

a. Construction Joints: At maximum intervals of thirty feet (30’), install a construction joint as detailed on the drawings. Install dowels as shown on the drawings. Minimum embedment on each side of the joints shall be six inches

(6”). All dowels shall be straight, square on the ends with no burrs. Locate 12” from the edge of the slab. Bars must be carefully aligned and square with the form face. Prevent bonding to the concrete on one side of the joint by using a plastic sleeve over the dowel or coat with an approved bond breaker. Alternate protected end on each side of the joints.

Dowels are also to be installed between new and existing concrete slabs. Where new or repaired walks abut existing concrete sidewalks, the contractor shall drill

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CONCRETE SIDEWALKS AND CONCRETE SIDEWALK RAMPS

holes measuring 3/4 of an inch in diameter and twelve (12) inches in depth at 24" on centers into the existing concrete slab. The dowels, dipped in a liquid asphalt and coated with an approved bond breaker or plastic sleeve shall be set into the existing sidewalk slab prior to the placement of concrete. The dowels are to be level with the latitude pitch of the sidewalk and shall conform to the details of these specifications. Any variations in dowel installation procedures must be approved by the Engineer.

Other locations to which dowels may be required will be directed by the Engineer.

b. Control Joints: Follow joint spacing as shown on the drawings. At intervals of approximately fifteen (15) feet, a full control joint shall be provided. A tooled joint, to the depth of 3/8 of an inch, shall be installed at approximately five (5) foot intervals along the sidewalk. The resulting areas should be as square as practical. All joints shall be installed using straight guides set at right angles to the longitudinal direction of the walk.

c. Isolation Joints will be installed wherever concrete is placed against already installed concrete of structures such a curbing, building, or other, previously existing paving.

If it becomes necessary to adjust the locations, horizontal or vertical dimensions of the above listed items due to interference with utilities or for other valid reasons, the

Contractor, with the approval of the Engineer, shall construct said items to the modified dimensions and locations.

5. Concrete Placement and Finishing

a. Subgrade preparation: The subgrade shall be approved by the Engineer prior to placement of concrete. The grade will be free of soft areas, roots, rubble and large stones. It shall be fully compacted and graded to provide the specified slab thickness within ¼".

b. Forms: Align forms as shown on drawings and secure to provide straight edges and uniform curves. Remove only after the concrete has gained sufficient strength to prevent chipping or raveling of the edges.

c. Where required, install welded wire mesh. Support the mesh on concrete bricks or other supports so that it will remain in the upper third of the slab.

d. Moisten the subgrade before starting concrete placement to eliminate water loss.

e. Place continuously, using construction joints at locations shown on the drawings or as approved…