Asphalt Pavement Maintenance Handbook瀝青路面的維修手冊(cè)

1、Selecting the Right Maintenance TreatmentSponsored by: Minnesota LTAP CenterPresented by: Michael Marti, P.E.SRF Consulting Group, Inc. Dan Wegman, P.E.SemMaterialsFor Each Maintenance TreatmentAn agency needs to define:Description/PurposeTimingEffects on various pavement distressAnticipated perform

2、ance/service lifeUnit costRoadway use/level of trafficTraffic control concernsLimitationsSeasonalAvailability of qualified staff and contractorsAvailability of quality materialsConstruction specificationsSelection and TimingType and extent of distressClimate and environmental factorsTraffic loadingE

3、xisting pavement typeCost of treatmentExpected lifeTime of placementFacility downtimeSurface frictionRecommended Applications Surface TreatmentsRecommended Applications Surface TreatmentsRecommended ApplicationsPatchingAsphalt Maintenance TechniquesEquivalent Annual Cost (EAC) = Unit Cost/Years of L

4、ifeTreatmentUnit CostApproximate Life (Years)EACCrack Sealing$1.00 / lf 2 3$0.40Fog Seal$0.20/yd23 4$0.04Chip Seal$0.55/yd23 6$0.12Slurry Seal$1.50/yd23 5$0.38Micro-surfacing$1.75/yd25 8$0.27Ultra Thin Bonded Overlay$2.90/yd28 10$0.32Thin Overlay$3.00/yd22 10$0.43Existing pavement Type, structure, r

5、oughness, skid, distresses, climate, etc.EnvironmentClimate, past & future traffic, noise, etc.Life cycle costsConstruction, maintenance, rehabilitation, user-delay costs, impact on local businesses, vehicle repair, etc.Available treatmentsConstruction requirements, performance, costs, capabilities

6、of local contractorsRight Treatment Depends on Analysis Procedures for Most Effective TreatmentA number of procedures for determining cost effectiveness exist and should be usedCost should be part of the decision process but not the only considerationUse of decision trees is a viable methodCostLife

7、CyclePavement Management of NetworkUser Delay Availability of ContractorsAvailability of MaterialsRight Treatment,Right Time,Right ProjectDone Right!Example of Selection ProcessDetermine Rating FactorsAssign “Importance Value to Each FactorPercentage (must total 100)Rank each of the Available/Applic

8、able Maintenance TreatmentsCalculate Totals Determine Rating FactorsCostHow well it “fixes distressesTraffic Disruption (during maintenance)Traffic Disruption (long term)Assign “Importance Value to Each FactorPercentage (must total 100)Rank each of the Available/Applicable Maintenance TreatmentsCalc

9、ulate TotalsDetermine Rating FactorsCostHow well it “fixes distressesTraffic Disruption (during maintenance)Traffic Disruption (long term)Assign “Importance Value to Each FactorPercentage (must total 100)Rank each of the Available/Applicable Maintenance TreatmentsExample of Selection Process11-Year

10、Old Pavement, 6000 ADT, Previously Seal Coated, L-Block Cracking, L-Rutting, L-PolishedDetermine Rating FactorsCostHow well it “fixes distressesTraffic Disruption (during maintenance)Traffic Disruption (long term)Assign “Importance Value to Each FactorPercentage (must total 100)Determine Rating FactorsCostHow well it “fixes distressesTraf