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1、AASHTO TIGPromoting the use of Precast Concrete Pavement Systems,AASHTO-Standing Committee on HighwaysHartford,CTOctober 17,2008Timothy J.LaCoss,Our Genesis,5 PCPS Systems identified in the market,each with very different attributes,precast designs,and varied construction approaches.No clear definit
2、ion of types of precast concrete pavement systems,nor any clear linkages to appropriate treatment selection for repair,rehabilitation or reconstruction of rigid pavements using PCPS.Very little activity in professional organizations nationally on PCPS i.e.,PCI,ACI,NPCA,ACPA,ASCE.Rudimentary guidance
3、 available on PCPS,primarily vendor specific.,Primary Drivers for PCPS,Increased congestion in our urban interstates and arterials with higher VMT forecast in the near future.Declining condition of our rigid pavement infrastructure(PCC accounts for approximately 35%of all pavement treatment types).C
4、lear need to use Accelerated Construction Methods to minimize work zone lane occupancy.5 hr work window in NY City Metro areaProvide an alternative pavement treatment that will last 30 to 40 years.,AASHTO TIG Lead States Team,Our Mission,To promote the use of Precast Concrete Pavement Systems for th
5、e Repair,Rehabilitation and Reconstruction of PCC Pavements to transportation agencies and owners nationwide.,PCPS Basics,Fabricated off-site Transported to the project site Installed on a prepared sub-base foundation No field curing or time to achieve strengthTwo main classifications of PCPSJointed
6、 Systems Prestressed Systems,PCPS General Terminology,Slab length,Load transfer mechanism with new or existing pavement,Pretension in transverse direction option(PPCP),Structural capacityfor handling,PCC thickness,material properties,Existing structure,Post-tensioningoption(PPCP),Friction reducing i
7、nterlayer or filler material(N.T.S.),Grouting materials,Paving and Pavement Rehabilitation Applications,Continuous Paving Intermittent Full Depth Repairs of PCC PavementsApplications:airport runways&taxiways,heavily traveled highways,ramps,toll plazas,intersections,crosswalks,ports-docks,bus pads,sm
8、art-sensor embedments,bridge approach slabs,pavement under bridges vertical clearance,Benefits of PCPS,Cast under ideal conditionsLong life expectancy with low maintenancePlacement in a short time frame congestion&safetyLess Risk to owner/contractorGrowing documentation of performance historyEstabli
9、shed industry,method and technologyStaged construction is possibleInstallation not affected by adverse weather conditions,Supported by FHWA,AASHTO,ACPA,NPCA,PCIReduced Work Zone timeframeChoice of surface TexturesPre-approval of PCPS System is possiblePre-existing specifications are availableGeneric
10、 specifications are availableEconomically competitive with alternative PCC pavement treatments,Snapshot of Precast Concrete Pavement Systems in the USA(2006),Precast Prestressed Concrete Pavement SystemPrecast/Prestressed Concrete Paving System(non-proprietary)Pre-stressed/Post-tensioned Panel syste
11、mFHWA Sponsored(CPTP program)Conventionally Jointed Precast Concrete Pavement SystemsUretek USA System(proprietary)Precast Panels on HDP foam with Stitch in Time load transfer deviceKwik Slab System(proprietary)Slab on grade,full load transfer,grout bedFt.Miller Super-slab System(proprietary)Slab on
12、 grade with full load transfer,grout bedMichigan-Precast Full Depth Replacement/DBR(non-proprietary)Slab on flowable fill or HDP dowels on top,Variety of PCPS Systems?,Ft.Miller-SuperSlab,Prestressed Precast Concrete Pavement,Kwik Slab,Uretek USA,FDR/DBR,AASHTO TIG SPECIFICATIONS&GUIDELINES FOR PCPS
13、,1.Guidance and Considerations for the Design of Precast Concrete Pavement Systems,2.Generic Specification for Fabricating and Constructing Precast Concrete Pavement Systems,3.Generic Specification forPrecast Concrete Pavement System Approval,4.Precast Concrete Pavement Systems forRapid Pavement Rep
14、air and Replacement:Basic Information and Commentary,Available at WWW.AASHTOTIG.ORG under the PCPS dropdown menu,www.aashtotig.orgWhats available on-line?,Detailed information about each of these 5 leading Precast Paving Systems.Design Guideline SpecificationsConstruction Guideline SpecificationsApp
15、roval Guidelines for PCPSResearch ReportsProven Agency Specifications,Highways for Life,Agency Partnerships,Federal Highway Administration,Accelerating Innovation for the American Driving Experience,PCPS Projects in 2008&2009,NYSTA I-95(CT-State line/Mamaroneck River to Cross Bronx Expressway)NYSDOT
16、 Nassau-Queens Expressway,Staten Island-West shore ExpresswayNJDOT I-280&Rt.21(Newark)Toronto,Canada(Downtown,Hwy 427)Illinois State Toll Authority(I-290/I-294&I-88&I-355)Iowa DOT(precast bridge approaches)DELDOT,intersection Rt.896&Rt.40(Bear,DE)Highways for Life ProjectsVirginia DOT I-66 Mainline&
17、Interchange RampFlorida DOT(Daytona)-IntersectionsCALTRANS I-15-MainlineNYSDOT I-88 Bridge Approach Slabs(Central NY),HfL/AASHTO TIG Sponsored Product ShowcaseComing Soon!,AASHTO TIG SUCCESSES,Developed a nationally recognized forum for PCPSSuccinctly identified various PCPS Systems,their attributes
18、,their applications and their history.We have developed generic specifications and guidelines for PCPS,where none existed.We have developed relationships with ACI,PCI,NPCA,ACPA,SHRP and other national organizations and programs to help promote the institutionalizing of PCPS pavement treatments.We ha
19、ve developed and implemented a Marketing Plan for PCPS to focus our outreach efforts and have partnered with FHWAs Highways for Life Program to further the outreach efforts nationwideWe have submitted an application for the FHWA/AASHTO 2010 International Scanning Tour on PCPS Applications.,Thank you for your support!,Timothy J.LaCossPavement&Materials EngineerFHWA-NY Division(518)431-4125,ext.260Timothy.LaCossfhwa.dot.govTo find out more details about Precast Pavements look atWWW.AASHTOTIG.ORG,
