現實世界中的路面保護.pdf

1、Rex W.EberlyNational Center Pavement PreservationPutting Pavement Preservation to Work in the Real WorldThe National Center for Pavement Preservation NCPP was established by Michigan State University and FP2,Inc.to lead collaborative efforts among government,industry,and academia in the advancement

2、of pavement preservation by advancing and improving pavement preservation practices through education,research and outreach.Collaborate AASHTO?TSP2 Preservation Partnerships?Emulsion Task Force(ETF)MnROAD,NCAT,PPRAAdvance National Pavement Preservation Conference(NPPC)Research Projects Training and

3、Education SurveyImprove National Pavement Preservation Certification Program Agency and Industry Training“Programs and activities employing a network level,long-term strategy that enhances pavement performance by using an integrated,cost-effective set of practices that extend pavement life,improve s

4、afety and improve motorist satisfaction while saving public tax dollars”.The treatment must:?Address pavements while they are still in good condition?Reduce aging?Extend Pavement Life?Restore Serviceability Network LevelNetwork Level?All Pavements(Urban,Rural,Airports)?Asphalt and Concrete LongLong-

5、Term StrategyTerm Strategy?Budgeted Expense IntegratedIntegrated?Department Wide?All Stakeholders CostCost-EffectiveEffective?Right Treatment,Right Road,Right Time Improve Road User SatisfactionImprove Road User SatisfactionBudgets Few agencies can afford a strategy of Build It,Rehab It,Build it Aga

6、inPavement Performance FHWA Performance Thresholds will be difficult to meet without Preservation.Material Changes Pavements dont seem to be lasting as long.Preservation stretches the service life of your pavementsSustainability Carbon Reduction Act Environmental Product Declarations(EPDs)THE BEST R

7、EASON IS IT WORKS!Remaining Service Life(RSL)Remaining Service Life(RSL)https:/eng.auburn.edu/research/centers/ncat/testtrack/preservation/observed-performance.htmlRemaining Service Life(RSL)ConceptEvery road segment has aRemaining Service Life200 lane-miles with NO REPAIRSor MAINTENANCE in a given

8、year,will lose 200 lane-mile-yearsof Remaining Service LifeSchedule annual work plans to match condition goals(“outcome-based budgeting”)MilesofTreatmentService Life of TreatmentMile/YearsExample:Agency Highway Network Network Size=4,356 lane miles0123450510152025Pavement Remaining Service LifePavem

9、ent Remaining Service Life(years)Percent of Network PavementCurrent Condition64,356 lane mile yearsAgency Highway Network=4,356 lane milesEach year the network will lose0123450510152025Pavement Remaining Service LifePavement Remaining Service Life(years)Percent of Network PavementPercent of Network

10、PavementCondition-One Year Later678Reconstruction EvaluationProjectLaneMilesDesignLifeLane MileYearsLane MileCostsTotalCost#12225 yrs550$463,425$10,195,350#21830 yrs540$556,110$10,009,980Total=1,090$20,205,330Rehabilitation EvaluationProjectLaneMilesDesignLifeLane MileYearsLane MileCostsTotalCost#32

11、218 yrs396$263,268$5,791,896#42815 yrs420$219,390$6,142,920#53212 yrs384$115,848$3,707,136Total=1,200$15,641,952Pavement Preservation EvaluationProjectLaneMilesLifeExt.Lane MileYearsLane MileCostsTotalCost#101122 yrs24$2,562$30,744#102223 yrs66$7,743$170,346#103265 yrs130$13,980$363,480#104167 yrs11

12、2$29,750$476,000#105810 yrs80$54,410$435,280Total=412$1,475,850 Required:4,356 lane mile yearsProgrammed ActivityLane MileYearsTotal CostReconstruction(40 lane miles)1,090$20,205,330Rehabilitation(82 lane miles)1,200$15,641,952Pavement Preservation (84 lane miles)412$1,475,850Total =2,702$37,323,132

13、Network Trend$Network Size(needs)4,356(lane mile years)Programmed Activity2,702(lane mile years)Deficit =1,654(lane mile years)Network Needs SummaryDollars Out Dollars Out Deferred MaintenanceDollars InDollars InAdditional Service LifeNetwork is Out of BalanceProgrammed ActivityLane Mile YearsRecons

14、truction(40 lane miles)1,090Rehabilitation(82 lane miles)1,200Pavement Preservation (84 lane miles )412Total =2,702Steps to Address Minimal Needs(31 lane miles)8202,3571,125(77 lane miles)Required:4,356 lane mile yearsPreservation TreatmentLifeExtLane MilesLane MileYearsTotal CostConcrete Reseal4 yr

15、s31124$979,600Thin HMA Overlay 10 yrs16160$870,560Micro-surfacing7 yrs44308$1,309,000Chip Seal5 yrs79395$1,104,420Crack Seal2 yrs5061,012$1,296,3721,999$5,559,952Savings=$6,101,940 Needs=1,999 LMYProgram ModificationProgrammed ActivityLane Mile YearsReconstruction(31 lane miles)820Rehabilitation(77

16、lane miles)1,125Pavement Preservation (2,083 lane miles)2,411Total =4,356Net Savings=$541,988Revised Network StrategyRequired:4,356 lane mile yearsDollars OutDollars OutDeferred Maintenance$Dollars InDollars InAdditional Service LifeBalanced Network Establishes Network Need Evaluates Reconstruction

17、Rehabilitation Preventive Maintenance Incorporates Design Life Life Extensions Quick Assessment MethodA Worst-First Rehabilitation Program Wont Save Your Network.Deferring Preservation Maintenancedoes NOT save$A balanced approach is bestUse Planned,Lower Cost Treatments To Extend Remaining Service L

18、ifePRESERVATIONPRESERVATION GOAL IS TO PLACE A TREATMENT THAT PRESERVES THE SURFACE AND EXTENDS RSL(REMAINING SERVICE LIFE)TIME BASED?EARLY AND OFTEN ADD SERVICE LIFE GENERALLY,LESS EXPENSIVE TREATMENTSPRESERVATION MAINTENANCEPRESERVATION MAINTENANCE GOAL IS TO REPAIR SURFACE DEFECTS,PRESERVE THE SU

19、RFACE AND EXTEND RSL(REMAINING SERVICE LIFE)TIME AND CONDITION BASED?PLACED AS EARLY AS POSSIBLE WHEN DEFECTS OCCUR.STOP THE DETERIORATION AND ADD SERVICE LIFE.MORE AGGRESSIVE PRESERVATION TREATMENTS?COMBINATION TREATMENTS PRESERVATION PROCESSESPRESERVATION PROCESSES?FOG SEAL?REJUVENATORS?CRACK SEAL

20、*?CHIP SEAL?SLURRY SEAL PRESERVATION MAINTENANCE PRESERVATION MAINTENANCE PROCESSESPROCESSES?CRACK SEAL/CRACK FILL/MASTIC?CHIP SEAL?SCRUB SEAL?FIBER MAT?PRESERVATION HMA OVERLAYS?MICRO SURFACING?CAPE SEALSREHABILITATION STRATEGY:Year 15:FDR plus 4”Hot Mix OverlayYear 30:FDR plus 4”Hot Mix OverlayYea

21、r 45:FDR plus 4”Hot Mix OverlayPRESERVATION STRATEGY:Years 5,14,30&39:Crack sealingYears 10&35:Microsurfacing(Double)Years 17&42:Cape SealYear 25:Mill&PaveveTOTAL COST/SY OVER 50 YEARS=$120.00TOTAL COST/SY OVER 50 YEARS=$72.00YEARSPICK A NEWLY PAVED ROADBUDGET NOW TO DO A LOW-COST PRESERVATION TREAT

22、MENT IN 2025 FOG SEAL OR CHIP SEALBUDGET NOW TO DO A PRESERVATION MAINTENANCE PROJECT IN 2029 CRACK SEAL WITH CHIP SEALWASH/RINSE/REPEATMINNESOTA DOTMINNESOTA DOT IMMEDIATE FOG SEAL OF NEW CHIP SEALS?LOCKS IN CHIPS AND REDUCES PLOW DAMAGE USE OF HOT-POUR MASTICS TO MANAGE DEEP THERMAL CRACKING EXPER

23、IMENTING WITH SOFTER BASE ASPHALT EMULSION IN MICRO SURFACING?ADDS FLEXIBILITY MICRO-MILL PRIOR TO PRESERVATION PROJECTS?REDUCES PLOW DAMAGE AND IMPROVES RIDESASKATCHEWAN,MANITOBA,ONTARIO PROVINCESSASKATCHEWAN,MANITOBA,ONTARIO PROVINCES ALL RELY HEAVILY ON CHIP SEALS AND MICRO SURFACING?NO CHANGES TO STANDARD SPECIFICATIONSLEARN MORE ROADRESOURCE.ORG PAVEMENT PRESERVATION.ORGCALCULATE RSL FOR THE ROADS YOU MANAGEBUDGET FOR AND SCHEDULE PRESERVATION CHOOSE PRESERVATION MAINTENANCE OVER REHABREX W.EBERLYEBERLYREMSU.EDU785-819-1403