Specifications - City of Montpelier, Vermont

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Montpelier District HeatingCity of Montpelier, VT02520 – Portland Cement Concrete PavingIssue Date:September 28, 2012Page #:8 of 10C. Moisten subbase to provide a uniform dampened condition at the time concrete is placed.Do not place concrete around manholes or other structures until they are at the requiredfinish elevation and alignment.D. Comply with requirements and with AASHTO M 157 for measuring, mixing,transporting, and placing concrete.E. Deposit and spread concrete in a continuous operation between transverse joints. Do notpush or drag concrete into place or use vibrators to move concrete into place.F. Use a bonding agent at locations where fresh concrete is placed against hardened orpartially hardened concrete surfaces.G. Consolidate concrete by mechanical vibrating equipment supplemented by handspading,rodding, or tamping. Use equipment and procedures to consolidate concrete complyingwith ACI 309R.1. Consolidate concrete along face of forms and adjacent to transverse joints with aninternal vibrator. Keep vibrator away from joint assemblies, reinforcement, or sideforms. Use only squarefaced shovels for handspreading and consolidation.Consolidate with care to prevent dislocating reinforcing, dowels, and joint devices.H. ColdWeather Placement: Comply with provisions of ACI 306R and as follows. Protectconcrete work from physical damage or reduced strength that could be caused by frost,freezing actions, or low temperatures.1. When air temperature has fallen to or is expected to fall below 40 deg F (4 deg C),uniformly heat water and aggregates before mixing to obtain a concrete mixturetemperature of not less than 50 deg F (10 deg C) and not more than 80 deg F (27deg C) at point of placement.2. Do not use frozen materials or materials containing ice or snow.3. Do not use calcium chloride, salt, or other materials containing antifreeze agents orchemical accelerators unless otherwise accepted in mix designs.I. HotWeather Placement: Place concrete complying with ACI 305R and as specifiedwhen hot weather conditions exist.1. Cool ingredients before mixing to maintain concrete temperature at time ofplacement to below 85 deg F (32 deg C). Mixing water may be chilled or choppedice may be used to control temperature, provided water equivalent of ice iscalculated to total amount of mixing water. Using liquid nitrogen to cool concrete isContractor's option.2. Cover reinforcing steel with watersoaked burlap if it becomes too hot, so that steeltemperature will not exceed the ambient air temperature immediately beforeembedding in concrete.3. Fog spray forms, reinforcing steel, and subgrade just before placing concrete. Keepsubgrade moisture uniform without standing water, soft spots, or dry areas.PORTLAND CEMENT CONCRETE PAVING 02520 8
Montpelier District HeatingCity of Montpelier, VT02520 – Portland Cement Concrete PavingIssue Date:September 28, 2012Page #:9 of 103.6 CONCRETE FINISHINGA. Float Finish: Begin floating when bleed water sheen has disappeared and the concretesurface has stiffened sufficiently to permit operations. Float surface with powerdrivenfloats, or by handfloating if area is small or inaccessible to power units. Finish surfacesto true planes within a tolerance of 1/4 inch in 10 feet as determined by a 10footlongstraightedge placed anywhere on the surface in any direction. Cut down high spots andfill low spots. Refloat surface immediately to a uniform granular texture.1. Broom Finish: Draw a soft bristle broom across concrete surface perpendicular toline of traffic to provide a uniform fine line texture finish.B. Final Tooling: Tool edges of paving, gutters, curbs, and joints formed in fresh concretewith a jointing tool to the following radius. Repeat tooling of edges and joints afterapplying surface finishes. Eliminate tool marks on concrete surfaces.1. Radius: 1/4 inch.3.8 CONCRETE PROTECTION AND CURINGA. General: Protect freshly placed concrete from premature drying and excessive cold orhot temperatures.B. Evaporation Control: In hot, dry, and windy weather, protect concrete from rapidmoisture loss before and during finishing operations with an evaporationcontrolmaterial. Apply according to manufacturer's instructions after screeding and bullfloating, but before floating.C. Begin curing after finishing concrete but not before free water has disappeared fromconcrete surface.D. Curing Methods: Cure concrete by moisture curing, moistureretainingcover curing,curing compound, or a combination of these as follows:1. Moisture Curing: Keep surfaces continuously moist for not less than 7 days with thefollowing materials:a. Water.b. Continuous waterfog spray.c. Absorptive cover, water saturated, and kept continuously wet. Cover concretesurfaces and edges with a 12inch lap over adjacent absorptive covers.2. MoistureRetainingCover Curing: Cover concrete surfaces with moistureretainingcover for curing concrete, placed in widest practicable width, with sides and endslapped at least 12 inches, and sealed by waterproof tape or adhesive. ImmediatelyPORTLAND CEMENT CONCRETE PAVING 02520 9
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Title:Project ManualMontpelier Dist
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CONSTRUCTION of a DISTRICT HEATING
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The City also reserves the right to
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NOTICE OF AWARDTO:_________________
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successors, and assigns.IN WITNESS
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ATTEST:____________________________
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Witness as to Principal____________
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CHANGE ORDER # _________CHANGE ORDE
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PAYMENT REQUEST FORMMontpelier Dist
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1.17. PROJECT 3 The undertaking to
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9. PATENTSof the PROJECT will resul
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creditors, or if a trustee or recei
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21.3.2.4. Personal Injury Liability
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26.3. The CONTRACTOR shall be fully
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• Install piping and fittings (in
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The only items to be excluded from
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Materials:• Purchase, shipment, f
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price per linear foot of trench. Pa
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Description:This item consists of a
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This item consists of all work nece
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Materials shall meet the requiremen
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Materials:Materials shall meet the
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Materials:• Shipping, transport,
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2) of the type specified will be pa
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Products.Method of Measurement:The
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Materials:• Extra pipe materials
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Bid Item 51 - Pre
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Materials shall meet the requiremen
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B. MaterialsMaterials shall meet th
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shall be made to the CONTRACTOR for
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Measurement shall be on an each bas
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use of crushed stone); taking and r
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B. MaterialsMaterials shall meet th
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Bid Item 75^ - In
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16. The Contractor shall be respons
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02511, Hot Mix Asphalt Paving and t
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The Contractor is hereby informed t
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BASE BIDNo Item Description UnitEst
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44 Pre9insulated Underground Hot Wa
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SERVICE LATERALS AND SPURS BIDNo It
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[13] Remove and Reset Granite Curb
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________________________ __________
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Montpelier District HeatingPROJECT
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DEEE0003071/003SPECIAL TERMS AND CO
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DEEE0003071/003a. Method of Payment
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DEEE0003071/003a. Requirements. The
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DEEE0003071/003applicable sections
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DEEE0003071/00321. NATIONAL ENVIRON
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DEEE0003071/003The Government has n
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DEEE0003071/003F. Protecting State
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DEEE0003071/003L. CertificationsWit
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DEEE0003071/003(C) Quantity;(D) Cos
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DEEE0003071/003(4) An Agreement bet
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DEEE0003071/003(D) Cost;(E) Time of
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DEEE0003071/003(c) Recipients agree
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DEEE0003071/003(a) Davis Bacon Act(
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DEEE0003071/003of Labor withhold or
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DEEE0003071/003submission of the
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DEEE0003071/003(6) Contracts and Su
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DEEE0003071/003this award. On behal
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DEEE0003071/003are federal governme
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Title:Montpelier District HeatingCi
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Title:Montpelier District Heating01
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Title:01340 - SubmittalsMontpelier
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Montpelier District HeatingCity of
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Title:15100 - ValvesMontpelier Dist
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Title:16110 - RacewaysMontpelier Di
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Title:16450 $ GroundingMontpelier D
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Specifications - City of Montpelier, Vermont

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