TABLE OF CONTENTS - Colorado Springs, Colorado
TABLE OF CONTENTSSECTION 600 STRUCTURAL CONCRETE601 SUBMITTALS602 PREPARATION FOR PLACEMENT602.01General602.02Placement on Hardened Concrete602.03Structural Concrete on Rock603 ing603.04Splicing603.05Welded Wire Fabric604 CONSTRUCTION JOINTS605 DEPOSITING THE CONCRETE606 CONSOLIDATING CONCRETE607 CURING607.01General607.02Cold Weather Requirements608 REMOVAL OF FORMS609 CONCRETE SURFACE FINISHES609.01Filling and Repairing Bolt Holes610 ADMIXTURES611 SLUMP612 DESIGN613 CONCRETE PROPORTIONING AND MIXING613.01Water-Cement Ratio613.02Cement Content613.03Air-Entraining Admixtures614 INSPECTION615 AGGREGATE AND CEMENT STORAGE616 MEASUREMENT AND -9600-9600-10600-10
SECTION 620 DRAINAGE CHANNELS600-11621 CHANNEL EXCAVATION621.01Description621.02Sections and Slopes621.03Excavation Beyond Established Lines621.04Dewatering621.05Bottom and Side Slopes621.06Disposal of Excavated Materials621.07Measurement and Payment622 CHANNEL EMBANKMENT AND BACKFILL622.01Description622.02Compaction and Watering Construction Equipment andMethods622.03Compacted nt and Payment623 CONCRETE CHANNEL CONSTRUCTION623.01General624 RIP RAP AND GROUTED RIP RAP CHANNEL CONSTRUCTION624.01Rip Rap Channel624.02Grouted Rip Rap Channel624.03Measurement and Payment625 AIR PLACED CONCRETE LINED erials, Proportioning and Mixing625.04Preparation of Surface625.05Forms and sh625.09Curing625.10Tests625.11Measurement and 0-24600-25
SECTION 630 STORM DRAINS AND CULVERTS600-26631 SCOPE OF WORK600-26632 GENERAL600-26632.01Standard Specification References600-27633 DESIGN CRITERIA FOR PIPE600-27634 REQUIREMENTS FOR PIPE DESIGN600-27635 MATERIALS600-27635.01Precast Concrete Pipe600-27635.02Precast Reinforced Concrete Box Sections600-27635.03Corrugated Steel Pipe and Sections600-28635.04Thermoplastic Pipe600-28635.05Joint Materials - Concrete Pipe600-29635.06Joint Material - Corrugated Metal Pipe and Pipe-Arch600-29635.07Joint Material - Thermoplastic Pipe600-30635.08Manholes600-30635.09Frame, Cover, Grates and 00-31635.12Reinforcing Steel600-32635.13Structural Steel600-32635.14Bedding Material - Granular600-32636 CONSTRUCTION REQUIREMENTS FOR MANHOLES, JUNCTIONBOXES, CAST IN PLACE REINFORCED CONCRETE BOX, INLETS,PIPE END FINISH AND FITTINGS600-33636.01Manholes - Precast Concrete600-33636.02Manholes - Corrugated Metal600-33636.03Junction Boxes - Cast in Place600-34636.04Cast in Place Reinforced Concrete Box Culvert600-34636.05Inlets600-34636.06End Finish600-35636.07Special Fittings and Connections.600-35637 ACCEPTANCE, HANDLING, INSTALLATION, EXCAVATION,BEDDING AND 7637.05Trench Excavation - 00-45638 MEASUREMENT AND PAYMENT600-46600-c
SECTION 600STRUCTURAL CONCRETEScope: The work under this section includes the furnishing of all labor andmaterials necessary for the construction of the reinforced concrete structuresaccording to the plans and these specifications. Structural concrete shall bedefined as mass concrete with steel reinforcement exceeding 0.3% of concretecross sectional area.601SUBMITTALSDetailed shop drawings and schedules shall be submitted as required by the Engineercovering all reinforcement in ample time to be checked and to permit correcteddrawings to be delivered to the Engineer well in advance of the time for proceeding withthe work. These drawings shall show the size, number, exact position and spacing ofsteel reinforcement and the exact location of all openings, framing, or special conditionsaffecting the work. Detailing of reinforcement shall conform to ACI 315.602PREPARATION FOR PLACEMENT602.01GeneralBefore placement, all equipment for mixing and transporting the concrete shall becleaned, and all debris and ice shall be removed from the places to be occupied by theconcrete. Forms shall be thoroughly oiled, and masonry filler units that will be in contactwith concrete shall be water saturated (except in freezing weather). The reinforcementshall be free of ice, dirt, rust, mill scale, or other coatings.Water shall be removed from place of deposit before the concrete is placed unlessotherwise permitted by the Architect or the Engineer. All laitance and other unsoundmaterial shall be removed from hardened concrete before additional concrete is added.Preparation prior to concreting includes compacting, trimming, and moistening thesubgrade, erecting the forms, and setting the reinforcing steel. A moist subgrade isespecially important in hot weather to prevent extraction of water from the concrete.Where concrete is to be deposited on rock, all loose material should be removed beforeconcrete is placed. When rock must be cut out, the surfaces in general should bevertical or horizontal rather than sloping. Forms shall be clean, tight, adequately braced,and constructed of materials that will impart the desired texture to the finished concrete.Sawdust, nails, and other debris shall be removed before concrete is placed. Woodforms shall be oiled before placing concrete.600-1
602.02Placement on Hardened ConcreteWhen fresh concrete is placed on hardened concrete, certain precautions shall be takento secure well-bonded, watertight joint. The hardened concrete should be fairly level,reasonably rough, clean, and moist. Some coarse aggregate particles shall be exposedand any laitance or soft mortar shall be removed from the top surface of the hardenedconcrete.For structures requiring more than one lift, the top of the lower course shall be broomed,just before it sets, with a steel or stiff fiber broom. The surface shall be level but heavilyscored and free of laitance. It must then be protected and thoroughly cleaned justbefore the grout coat and top course are placed. Hardened concrete shall be moistenedthoroughly before new concrete is placed on it. Where the surface has dried out it shallbe saturated for 24 hours. No pools of water shall be left standing on the wettedsurface when the new concrete is placed.602.03Structural Concrete on RockWhere concrete is to be placed on rock, the rock should be thoroughly cleaned andconcrete placed so as to fill all irregularities in its surface.603REINFORCEMENTThe reinforcing bars shall be in conformity with ASTM A-615 SI Grade 40 and Grade 60and the general notes on the structural drawings. Welded wire fabric for concretereinforcing shall conform to ASTM A-82 and A-185. Dowels, conforming to therequirements of ASTM A-15, shall be intermediate grade plain bars rolled from billetstock.603.01CleaningReinforcement prior to depositing of concrete shall be free from rust, scale, oil, ice, orother coatings that will destroy or reduce the bond, including mortar from previousconcrete pours.603.02BendingReinforcement shall be bent cold. Bars shall be full length required and accurately bentto details. No bars partially embedded in concrete shall be field bent except as shownon the drawings or specifically permitted by the Engineer.600-2
603.03PlacingReinforcement shall be accurately located in forms and firmly held in place before andduring the depositing of concrete by means of metallic supports, metal chairs, spacerbars, tie wire or other devices adequate to insure against displacement during thecourse of construction.Reinforcement shall be protected by the thickness of concrete cover as follows:A.Where concrete is deposited against the ground without the use of formsnot less than 3 inches.B.Where concrete is exposed to weather or ground but placed in forms notless than two inches (2") for bars larger than No. 5 and 1-1/2 inch for No. 5or smaller.C.Slabs and walls not exposed to ground or weather not less than 3/4 inch.D.Beams, girders, and columns not exposed to ground or weather not lessthan 1-1/2 inches. Where the above requirements conflict with the ASIHandbook, the greater requirement shall govern.Exposed reinforcing bars intended for bonding with future extensions shall be protectedfrom corrosion by adequate covering.603.04SplicingWherever it is necessary to splice reinforcement other than as shown on the drawings,the character of the splice shall be approved by the Engineer on the basis of allowablebond stress in the reinforcement at the splice. Splicing shall not be made at points ofmaximum stress nor shall adjacent bars be spliced at the same point. (Lap distanceshall be 24 diameters, or as specified).603.05Welded Wire FabricWelded wire fabric shall be laid continuously with edges and ends overlapping adjoiningsheets a minimum of 6" tied and placed over all piping and conduits. The fabric shall belifted by approved methods to the designed location of all slabs during the depositing ofconcrete, or properly supported in this position. Where required, bulkheads atconstruction joints and all screeds shall be constructed in such a manner as to place thefabric in the proper position.600-3
604CONSTRUCTION JOINTSConstruction joints will occur at 10' intervals unless otherwise specified in plans.A delay until the concrete is no longer plastic in columns or walls must occur beforeconcrete is placed in the beams, girders, or slabs to be supported. Beams, girders,brackets, column capitals, and haunches shall be considered as part of the floor systemand shall be placed integrally with it.Construction joints in floors shall be located near the middle of the spans of slabs,beams, or girders. If a beam intersects a girder at this point, the joint in the girder shallbe offset a distance equal to twice the beam width and adequate shear reinforcementprovided.605DEPOSITING THE CONCRETEConcrete should be placed as nearly as possible in its final position. In slabconstruction, placing shall be started around the perimeter at one end of the work witheach batch dumped against previously placed concrete. The concrete shall not bedumped in separate piles and the piles then leveled and worked together; nor shall theconcrete be deposited in big piles and moved horizontally to its final position.In walls, the first batches in each lift shall be placed at either end of the section; theplacing shall then be toward the center.In general, concrete shall be placed in horizontal layers of uniform thickness, each layerbeing thoroughly consolidated before the next is placed. Layers shall be 6 to 20 inchesthick for reinforced members, 15 to 20 inches thick for mass work - the thicknessdepending on the width between forms and the amount of reinforcement.Concrete shall not be moved horizontally over ten feet (10') within forms or in slabs. Theheight of free fall of concrete shall be a maximum of four (4’) feet unless otherwiseapproved by the Engineer.606CONSOLIDATING CONCRETEConsolidation shall be by vibration. Immersion type vibrators shall be used toconsolidate concrete in walls, columns, beams, and slabs. The vibrator shall belowered vertically into the concrete and should be allowed to descend by gravity. Thevibrator shall penetrate to the bottom of the lift and penetrate into the previous liftenough to ensure a monolithic homogeneity between the top and bottom lifts.600-4
When the paste first appears near the top of the vibrator head, the vibrator should bewithdrawn vertically at about the same rate that it descended. The vibrator shall bereimmersed at such intervals that the "spheres of influence" overlap. Vibrators shall notbe used to move concrete horizontally. The length of time that the vibrator should beleft in the concrete is a function of the slump of the concrete; high slump concreterequires little or no vibration.607CURING607.01GeneralImmediately after forms have been removed, all concrete shall be cured by one of thefollowing methods. When the temperature is expected to fall below 35 degreesFahrenheit, the Contractor shall provide suitable measures to maintain the concretesurface temperature between 50 degrees Fahrenheit and 90 degrees Fahrenheit duringthe curing period.A.Water method. All surfaces other than slabs shall be protected from thesun and the whole structure shall be kept wet for a period of at least 5days. All concrete slabs shall be covered as soon as possible with suitablematerial so that concrete is kept thoroughly wet for at least 5 days.B.Membrane Forming Curing Compound. All surfaces shall be given therequired surface finish prior to application of the curing compound. Duringthe finishing period, the concrete shall be protected by the water methodof curing. The rate of application of curing compound will be as directed bythe Engineer, but shall not be more than 200 square feet per gallon. Allconcrete cured by this method shall receive two applications of the curingcompound. The first coat shall be applied immediately after stripping offorms and acceptance of the concrete finish. If the surface is dry, theconcrete shall be thoroughly wet with water and the curing compoundapplied just as the surface film of water disappears. The secondapplication shall be applied after the first application has set. During curingoperations, any unsprayed surfaces shall be kept wet with water. Whenusing a curing compound, the compound shall be thoroughly mixed withinan hour before use.C.Form Method. Concrete shall be protected by forms for at least 7 daysunless otherwise approved by the Engineer. Forms shall be kept moist,when necessary, during the curing period.600-5
607.02608Cold Weather RequirementsA.Adequate equipment shall be provided for heating concrete materials andprotecting concrete during freezing or near freezing weather. No frozenmaterials or materials containing snow or ice shall be used.B.All reinforcement, forms, fillers, and ground with which the concrete is tocome in contact with shall be free from snow and ice. All concrete placedin forms shall have a temperature of 50 degrees Fahrenheit, or higher,after placement. Adequate means shall be provided for maintaining thistemperature for seven (7) days.C.When high-early-strength concrete is used, a temperature of at least 50degrees Fahrenheit shall be maintained for three (3) days. In either case,additional time necessary to ensure proper curing of the concrete shall beprovided as directed by the Engineer. The housing, covering, or otherprotection used in curing shall remain intact at least 24 hours after artificialheating is discontinued. If insulation is removed before the recommendedtime, the concrete shall be covered with an impervious sheet and theartificial heat continued for the required time. No dependence shall beplaced on salt or other chemicals for the prevention of freezing. In nocase shall concrete be heated to more than 70 degrees Fahrenheit.REMOVAL OF FORMSForms shall be removed in such a manner as to ensure the complete safety of thestructure. Where the structure is supported on shores, the removable floor forms,beams, columns, and other vertical forms may be removed after 24 hours, providing theconcrete will not be injured. In no case shall supporting forms or shoring be removeduntil members have acquired sufficient strength to support their weight and imposedloads safely.609CONCRETE SURFACE FINISHESA.General. Unless otherwise authorized, all formed surfaces shall befinished with Class 1 finish. For form cured surfaces, this finish will beconstructed immediately following curing.The Class 1 finish shall be applied immediately after the forms areremoved and forms may be removed for only that portion of the work thatcan be finished in the remainder of a work day. The exposed concreteshall be kept damp during the finishing period and covered with the curingcompound immediately following the completion of the finishing.600-6
Culvert headwalls and wingwall surfaces above ground, retaining wallsand any other structure where visible from a traveled way, shall receive aClass 2 finish.Surfaces other than listed herein or surfaces requiring specialconsideration shall receive the finish shown on the plans or called for inthe specifications.The various classes of finish are described as follows:1.2.Class 1, Ordinary Surface Finish. All fins and irregular projectionsshall be removed from all surfaces except from those which are notto be exposed or are not to be waterproofed. On all surfaces, thecavities produced by form ties, honeycomb spots, broken cornersor edges and other defects shall be thoroughly cleaned, moistenedwith water and carefully pointed and trued with a mortar consistingof cement and fine aggregate and the surface left sound, smooth,even and uniform in color. Mortar used in pointing shall be notmore than 30 minutes old. The mortar patches shall be cured asspecified in Section 607.01 or other approved methods. Allconstruction and expansion joints in the completed work shall beleft carefully tooled and free of all mortar and concrete. The jointfiller shall be left exposed for its full length with clean and trueedges.Class 2, Rubbed Finish. After completion of Class 1 OrdinarySurface Finish, the rubbing of concrete shall be started as soon asits condition will permit. Immediately before starting this work theconcrete shall be moistened with water. Sufficient time shall haveelapsed before the wetting down to all the mortar used in thepointing to thoroughly set. Surfaces to be finished shall be rubbedwith a medium coarse carborundum stone, using a small amount ofmortar on its face. The mortar shall be composed of cement andfine sand mixed in the same proportions as the concrete beingfinished. Rubbing shall be continued until all form marks,projections, and irregularities have been removed, all voids filledand a uniform surface has been obtained. The paste produced bythis rubbing shall be left in place.After all concrete above the surface being treated has been cast, the finalfinish shall be obtained by rubbing with a fine carborundum stone andwater. This entire surface is of a smooth texture and uniform color.After the final rubbing is completed and the surface has dried, it shall bewiped with burlap to remove loose powder and shall be left free from allunsound patches, paste, powder, and objectionable marks.600-7
609.01Filling and Repairing Bolt HolesAfter forms are removed, bolt holes and tie rod holes shall be filled with mortar carefullypacked into place in small amounts. The mortar should be mixed as dry as practicable,with only enough water so that it will be tightly compacted when forced into place.White cement shall be mixed in patching mortar and concrete where appearance isimportant. Concrete in patches should be cured at least two (2) days and if non-shrinkmortar is used. Curing is not required.Bulges and projections shall be removed by chipping or tooling. The surface shouldthen be rubbed or ground. Honeycombed and other defective areas shall be chippedout to solid concrete. The edges should be cut as straight as possible and at rightangles to the surface or slightly undercut to provide a key at the edge of the patch.Shallow patches may be filled with stiff mortar similar to that used in the concrete. Theyshall be placed in layers not more than 1/2 inch thick and each layer given a scratchfinish to improve bond with the subsequent layer. The final layer shall be finished tomatch the surrounding concrete by floating, rubbing, or tooling, or on formed surfacesby pressing the form material against the patch while still plastic.Deep patches shall be filled with concrete held in place by forms. Such patches shall bereinforced and dowelled to the hardened concrete.Defective concrete shall be cut out to expose solid concrete.Before patching concrete is applied, the surrounding concrete shall be kept wet forseveral hours. A grout shall be brushed into the surfaces to which the new material is tobe bonded. The area shall be damp when the grout is applied.Curing shall be started as soon as possible to avoid early drying. Damp burlap, wetsand, or tarpaulins can be used. In locations where it is difficult to hold these materialsin place, an application of two coats of membrane curing compound shall be used.Wherever practicable, cavities that have a small area but are relatively deep shall befilled with dry-pack mortar. After the cavity has been cleaned of oil and loose material,the mortar should be tamped into place in layers of approximately 1/2 inch thick.Vigorous ramming and adequate curing will ensure good bond and minimum shrinkageof the patch.610ADMIXTURESCalcium Chloride shall not be used as an antifreeze agent. Calcium Chloride as anaccelerating agent in amounts not to exceed 1.5% by weight of cement may be usedupon the approval of the Engineer.600-8
611SLUMPThe water-cement ratio shall be such as to produce the following slumps:Type of ConstructionMass concreteReinforced slab, beams,girders and walls612Minimum1"Maximum3"1"4"DESIGNPrior to the beginning of the concrete placement, the Contractor shall submit asrequired to the Engineer for approval a concrete mix design prepared at the Contractor'sexpense by a certified testing lab. The mix design shall include certified lab reportsshowing compliance of all materials to the specifications and test results of all requiredlaboratory tests for concrete mixes. As a minimum, compressive strength values shallbe 4000 psi at 28 days unless otherwise specified.613CONCRETE PROPORTIONING AND MIXING613.01Water-Cement RatioThe maximum water-cement ratio for all concrete shall be 0.45.613.02Cement ContentThe minimum cement content per cubic yard for all concrete shall be 6 sacks.613.03Air-Entraining AdmixturesAll air-entraining admixtures shall contain an air-entraining agent conforming to ASTMC-260. The entrained air content of all concrete shall be controlled at 6% (-1 2).614INSPECTIONThe Engineer shall be offered uninterrupted access to the batching plant at all times thatthe work is in progress.600-9
615AGGREGATE AND CEMENT STORAGECement and aggregates shall be stored at the plant site in such a manner as to preventdeterioration or intrusion of foreign matter. Any material which has deteriorated or whichhas been damaged shall not be used.616MEASUREMENT AND PAYMENTMeasurement and payment shall be as outlined in the Bid Proposal and/or SpecialProvision sections.600-10
SECTION 620DRAINAGE CHANNELS621CHANNEL EXCAVATION621.01DescriptionThis section covers channel excavation, excavation for structures, and work related tothese items. Embankment materials shall be moisture conditioned at the site ofexcavation as necessary to comply with the requirements of these specifications.The Contractor shall provide all temporary drainage facilities and dewatering necessaryto prevent ponding of water in areas of excavation and washouts.Existing topsoil shall be stripped, stockpiled, and placed on the compacted sideslopesas shown in the approved contract documents or as directed by the Engineer.621.02Sections and SlopesExcavation sections, profiles, and slopes shall be cut true and straight in conformity withthe lines and grades shown in the approved contract documents within the followingtolerances, measured normal to the excavated surfaces:SurfacesSide SlopesProfile of invert of ditches and channelsTolerance 10% 0.3 footThe extreme of such tolerances shall not be continuous over a distance of 1OO-feet ormore as measured at any place, in any direction, parallel to the excavated surface. Noadditional payment shall be made for over excavations.621.03Excavation Beyond Established LinesPrecautions shall be taken to preserve, in an undisturbed condition, material beyond thedesignated lines of the excavations except unsuitable material ordered removed by theEngineer. Material loosened beyond the excavation limits as a result of excavationoperations shall be considered defective work and be compacted or removed andreplaced with compacted embankment as directed by the Engineer at no cost to theowner.600-11
621.04DewateringThe excavation shall be dewatered to the extent required for construction operations toproceed under dry conditions. Dikes, channels, flumes, drains, sumps, pumpingequipment, and other temporary diversion and protective works shall be constructed,furnished, installed, operated, and maintained by the Contractor at no additional cost tothe owner.621.05Bottom and Side SlopesThe bottom and side slopes of any excavation in soil against which concrete is to beplaced shall be finished carefully to the elevations and dimensions shown on theapproved contract documents. Prior to placement of the lining. The top one (1) foot ofthe foundation material shall be compacted to not less thanA.For Cohesive Soils, 90% maximum Modified Proctor dry density at 2%of optimum moisture content or 95% maximum Standard Proctor drydensity at 2% of optimum moisture content.B.For Cohesionless Soils, 92% maximum Modified Proctor dry density at 2% of optimum moisture content or 97% maximum Standard Proctor drydensity at 2% of optimum moisture content.C.For Expansive Soils, 88% maximum Modified Proctor dry density at 3% orgreater above optimum moisture content or 93% maximum StandardProctor dry density at 1% or greater above optimum moisture content.Material which will not provide a suitable foundation shall be removed and replaced withcompacted backfill or concrete as directed by the Engineer.621.06A.Disposal of Excavated MaterialsGeneral: The Engineer shall determine the suitability and placing of thematerials in the various portions of the work in accordance with therequirements of these specifications. Oversize material or otherwiseunsuitable material shall be broken down to acceptable sizes or shall beremoved from the work. All areas receiving excavated material shall becleared and grubbed removing all stumps, roots, logs, brush, grass,topsoil, and other debris. The cleared and grubbed area shall extend aminimum of ten (10) feet beyond the concrete or rip rap channelconstruction.600-12
B.Compacted Embankment: Material from the excavation which is suitablefor compacted embankment shall be dense and homogeneous whencompacted as specified in Section 621.05 above. The material with in two(2) feet of the lining, measured horizontally, shall be free of all organicmatter or other deleterious material and of all material larger than five (5)inches in maximum dimension.C.Compacted Backfill: Material from excavation which is suitable forcompacted backfill shall be the same as that which is suitable forcompacted embankment, except that it shall be free of all materials largerthan three (3) inches in maximum dimensions.D.Waste: All excess and/or unsuitable material shall be hauled from the siteat the Contractor's expense, unless otherwise specified in the approvedcontract documents.621.07Measurement and PaymentMeasurement and payment for channel excavation shall be as set forth in the approvedcontract document. This payment shall be full compensation for all materials, tools,equipment, and labor necessary to complete the work under this section in accordancewith the approved contract documents and these specifications.622CHANNEL EMBANKMENT AND BACKFILL622.01DescriptionThis section covers the items Compacted Embankment and Compacted Backfill asdefined under Section 621.06. Existing topsoil shall be stripped, stockpiled, and placedon the compacted embankment or backfill as shown in the approved contractdocuments or as directed by the Engineer.622.02Compaction and Watering Construction Equipment andMethodsThe types of equipment and methods employed in moisture conditioning andcompaction of embankments shall be at the option of the Contractor and as approvedby the Engineer. The equipment and methods used must produce results in compliancewith these specifications.Construction equipment for the application of water shall be designed to apply wateruniformly, under pressure, and in controlled quantities to variable widths of surface.Equipment shall have positive shutoff valves so that no leakage will result when not inoperation.600-13
622.03Compacted EmbankmentThis section includes construction of all embankments designated on the drawings ascompacted embankment and placing embankment material in over-excavated areas inthe channel as directed by the Engineer.A.Foundation Preparation: Surfaces upon which the embankment is to beconstructed shall be cleared and grubbed. The top two (2) feet ofsubgrade shall be compacted to not less than:1.2.3.For Cohesive Soils, 90% maximum Modified Proctor dry density at 2% of optimum moisture content or 95% maximum StandardProctor dry density at 2% of optimum moisture content.For Cohesionless Soils, 92% maximum Modified Proctor drydensity at 2% of optimum moisture content or 97% maximumStandard Proctor dry density at 2% of optimum moisture content.For Expansive Soils, 88% maximum Modified Proctor dry density at3% or greater above optimum moisture content or 93% maximumStandard Proctor dry density at 1% or greater above optimummoisture content.Material unsuitable for embankment foundations shall be removed asdirected by the Engineer and replaced with suitable material andcompacted in accordance with the requirements of this section.B.Construction of Embankment: Material for embankment shall be asspecified in Section 621.06. Material may be moisture conditioned at thesite of excavation or at the embankment site at the Contractor's option.Material which contains excess moisture shall be dried until the requiredcompaction can be obt
603.05 Welded Wire Fabric 600-3 604 CONSTRUCTION JOINTS 600-4 605 DEPOSITING THE CONCRETE 600-4 606 CONSOLIDATING CONCRETE 600-4 607 CURING 600-5 607.01 General 600-5 607.02 Cold Weather Requirements 600-6 608 REMOVAL OF FORMS 600-6 609 CONCRETE SURFACE FINISHES 600-6 609.01 Filling and Repairing Bolt Holes 600-8
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