2010-10-14 UTK Geotechnical & Structural Seminar Series FDR & RCC
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Transcript of 2010-10-14 UTK Geotechnical & Structural Seminar Series FDR & RCC
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Department of Civil &epartment of Civil &Environmental Engineeringnvironmental Engineering Fall 2010 Geotechnical &all 2010 Geotechnical &Structural Seminar Seriestructural Seminar Series
Full-Depth Reclamation &
Roller-Compacted ConcreteA Municipal Perspective
Ariel Soriano, PEEngineering ManagerCity of Chattanooga
Department of Public Works
October 14, 2010
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Pavement Managementavement ManagementA Cooperative EffortCooperative Effort
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Civil &Geotechnical
Engineering
MaterialsEngineering
EngineeringEconomics
ConstructionOperations
FailureAnalysis
ProjectManagement
StatisticalQA/QC
PavementDesign &
Mechanics
PAVEMENT
MANAGEMENT
PHILOSOPHY
Pavement Managementavement ManagementTeam Capabilitieseam Capabilities
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Pavement Managementavement ManagementTeam Objectiveeam Objective
Develop and Implement Long-Term PavementManagement Strategies With Contributions From:
Consultants
Contractors Industry Associations Materials Suppliers
In Other Words:
Maintain what weve got & build and/or rebuild our roads to last longer
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Engineering Managementngineering Management
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Present & Futureresent & FutureConstruction Issuesonstruction Issues
Liquids Asphalt Cements Asphalt Emulsions
(Tack Coats) Foamed Asphalts Fuels
Lubricants Solvents Paints Etc.
Solids Plastic Drainage
Mats & Pipes Turf Reinforcement
Mats Erosion Control
Blankets Geotextiles Geogrids Tires Etc.
Escalating Cost Of Petroleum-Based Productsscalating Cost Of Petroleum-Based Products
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Present & Futureresent & FutureConstruction Issuesonstruction Issues
(Cont.)Cont.)207% Increase In 5-Years
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Present & Futureresent & FutureConstruction Issuesonstruction Issues
(Cont.)Cont.)Assume $1-Million ForHMA Placement
For The 1991 2004 Time-Adjusted Price Of$27.75/Ton
31.0-Miles Of 24-Ft Wide Roadway w/ 1Overlay
For The 2009 Price Of $82.87/Ton 10.4-Miles Of 24-Ft Wide Roadway w/ 1
Overlay
A 66% Reduction
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Innovative Constructionnnovative ConstructionMaterials & Practicesaterials & Practices
For Longer Performanceor Longer Performance
Full-Depth Pavement Reclamation w/
and w/o a Modifier and/or Stabilizer(FDRC & FDR)
Roller-Compacted Concrete (RCC)
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FDRC At Hixson Ball FieldsDRC At Hixson Ball FieldsAcross From Hixson Middlecross From Hixson Middle
School (Cont.)chool (Cont.)
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FDRC At Hixson Ball Fields AcrossDRC At Hixson Ball Fields AcrossFromrom
Hixson Middle School (Cont.)ixson Middle School (Cont.)
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FDRC At Hixson Ball Fields AcrossDRC At Hixson Ball Fields AcrossFrom Hixson Middle School (Cont.)rom Hixson Middle School (Cont.) ConventionalConstruction
Remove ExistingPavementMaterials
Prepare Subgrade Build New
ConventionalPavementStructure
~ 2 3 Weeks
~ $130,000
FDRC Materials Cost -
$15,387.99 Staff & Equipment
Cost -
$26,875.41 5-Day Construction
3-DaysReclaiming /Grading /
MixingCement/Compacting
2-Days Paving
$42,263.40FDRC: ~ 33% Of Conventional Cost & Time
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FDR At Manufacturers RoadDR At Manufacturers Road
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FDR At Manufacturers RoadDR At Manufacturers Road(Cont.)Cont.)
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FDR At Manufacturers RoadDR At Manufacturers Road(Cont.)Cont.)
950-ft x 42-ft x 1.2-ft = 47,880-ft50-ft x 42-ft x 1.2-ft = 47,880-ft3 (1,775-yd(1,775-yd3) Conventional
Removal 7-Days
Haul To A
ConstructionMaterials WasteSite
Haul New Material
In To MaintainTraffic AndProvide SiteAccess
FDR Removal 3-Days
Used ReclaimedMaterial To
Maintain Traffic &Provide SiteAccess
Stockpiled ExcessReclaimedMaterial For UseWith Cement OnAnother Project
FDR Removal: Less Than 45% Of The
Time Required For Conventional Removal
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RCC At The North AccessCC At The North AccessRoad Recycle Centeroad Recycle Center
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RCC At North AccessCC At North AccessRoad Recycle Centeroad Recycle Center
(Cont.)Cont.)
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RCC At North AccessCC At North AccessRoad Recycle Centeroad Recycle Center
(Cont.)Cont.)
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Tight Longitudinal JointTight Longitudinal Joint Header JointHeader Joint Poor Longitudinal JointPoor Longitudinal Joint
RCC At North AccessCC At North AccessRoad Recycle Centeroad Recycle Center
(Cont.)Cont.)
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FDRC & RCC At Tyner Ball FieldsFDRC & RCC At Tyner Ball FieldsParking Lot (ConParking Lot (Cont.)t.)
nReclaimed PavementReclaimed PavementnGraded to DrainGraded to Drainn
nAdded Cement @ 4% By WeightAdded Cement @ 4% By Weight
( 3.5 to 4.0 psf)( 3.5 to 4.0 psf)n
Reclaimed Again & Added WaterReclaimed Again & Added WaterThrough Distributor BarThrough Distributor BarnCompacted & Fine Graded MaterialCompacted & Fine Graded MaterialnPlaced 2-inch AC SurfacePlaced 2-inch AC Surface
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RCCRCC
~ 1-acre~ 1-acre
DRC w/ AC SurfacingDRC w/ AC Surfacing1111//22-acre-acre
n$400,000 Budgeted for AC Overlay On$400,000 Budgeted for AC Overlay On
Failed Parking Lot & New AccessFailed Parking Lot & New AccessRoadRoad
nWhat The City Did:What The City Did:
New Parking Lot (FDRC w/ ACNew Parking Lot (FDRC w/ ACSurface)Surface)
Doubled Parking w/ New RCC LotDoubled Parking w/ New RCC Lot
New Access Road w/ RCCNew Access Road w/ RCC
$360,000$360,00010% Reduction From10% Reduction From
Conventional ConstructionConventional Construction
White Asphalt ?!?!?!White Asphalt ?!?!?!NO Its RCC !NO Its RCC !
Ball Fields Parking Lotall Fields Parking Lot(Cont.)Cont.)
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RCC w/ AC Surface At TheCC w/ AC Surface At ThePatten Recycle Centeratten Recycle Center
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Patten Recycle Centeratten Recycle Center(Cont.)Cont.)
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Patten Recycle Centeratten Recycle Center(Cont.)Cont.)
Conventional Construction Undercut & Replace 2- to
3-feet
Place conventionalasphalt section
4- to 6-weeks
Cost $228,000
RCC w/ Asphalt Surface Build Drainage
Structures
Lay Drainage Pipe Prepare subgrade to
support paver
Pave w/ RCC
Place 2-inch AsphaltSurface
Cost = $189,224.3317% Reduction From Conventional Construction17% Reduction From Conventional Construction
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RCC At NorthpointCC At NorthpointBoulevard Extensionoulevard Extension
Phase IPhase I
Phase IIPhase II
Phase IIIPhase III
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Boulevard Extensionoulevard Extension(Cont.)Cont.) Conventional
Arterial Design
11
/2 AC Surface 31/2 AC Binder
15 AggregateBase
$32.15/SY $269,513.45
CTB Arterial Design
11
/2 AC Surface 2 AC Binder
9 Aggregate Base
$29.50/SY $247,298.50
92% ofConventional
RCC ArterialRCC Arterial
DesignDesign
n
2 AC Surface2 AC Surfacen6 RCC6 RCCn
23.35/SY23.35/SY
$195,743.05$195,743.05
73% of73% ofConventionalConventional
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Boulevard Extensionoulevard Extension(Cont.)Cont.)
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VW Connector RoadW Connector Road
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Other FDRC And/Or RCCther FDRC And/Or RCCProjectsrojects
City Wide Services FDRC
Utility TrenchSettlements
City ParkingLots
Road Base &SubgradeFailures
RCC 2-Acres At
PattenRecreation &RecycleCenter
Contractors FDRC
CommercialSites
SubgradeStabilization Subdivision
SubgradeStabilization
RCC -Mile AlternateBid Item OnCity Contract
Main RoadLeading ToFedEx
Terminal
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Ongoing FDR & RCCngoing FDR & RCCTopicsopics
Evaluate Construction Quality Control TestingEvaluate Construction Quality Control TestingAlternativesAlternatives
Establish Appropriate FDR & RCC Specifications &Establish Appropriate FDR & RCC Specifications &StandardsStandards
Put RCC Mix To SleepPut RCC Mix To Sleep
Develop Structural Coefficients For Use In PavementDevelop Structural Coefficients For Use In PavementDesignDesign
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Verify Structural Designerify Structural DesignCoefficients/Parameters Foroefficients/Parameters For
Use In Pavement Designse In Pavement Design
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Coefficients/Parameters Foroefficients/Parameters ForUse In Pavement Designse In Pavement Design
(Cont.)Cont.)Deflection TestingDeflection Testing
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Coefficients/Parameters Foroefficients/Parameters ForUse In Pavement Designse In Pavement Design
(Cont.)Cont.)Pavement LayerPavement Layer StructuralStructural
CoefficientCoefficientGraded Aggregate BaseGraded Aggregate Base 0.140.14
Cement Treated BaseCement Treated Base .18 - .24.18 - .24Asphalt ConcreteAsphalt Concrete 0.40 0.440.40 0.44
FDR w/ CementFDR w/ Cement 0.16 0.340.16 0.34
RCCRCC 0.64 0.730.64 0.73
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You can't build a reputationYou can't build a reputationon what you're going to do.on what you're going to do.
Henry Ford
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Any Questions?