2010-10-14 utk geotechnical & structural seminar series fdr & rcc

8/8/2019 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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(Cont.)Cont.)207% Increase In 5-Years


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(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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(Cont.)Cont.)


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Tight Longitudinal JointTight Longitudinal Joint Header JointHeader Joint Poor Longitudinal JointPoor Longitudinal Joint


(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?

2010-10-14 utk geotechnical & structural seminar series fdr & rcc

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