Decision Matrix for Pavement Preservation. Mike Mamlouk Arizona State University

Transcription

1 Decision Matrix for Pavement Preservation Mike Mamlouk Arizona State University

2 Outline 1. Concept of preventive maintenance 2. Effectiveness of treatments 3. Treatment selection 2

3 Pavement Pavement Preservation Minor Rehabilitation Rehabilitation Preventive Maintenance Maintenance Other Types types of Maintenance Maintenance It excludes major rehabilitation or reconstruction

4 Typically Low High Needs Budget Not enough to maintain current conditions Preventive Maintenance Could Not enough to eliminate backlog be the Answer

5 When should a pavement preventive maintenance treatment be applied?

6 How much oil should a car burn before changing oil?

7 What is Preventive Maintenance? Cost effective treatments that: preserve the pavement system retard future deterioration maintain or improve the functional condition (without increasing structural capacity)

8 Program Strategy Pavement Condition Time or traffic

9 Effective Preventive Maintenance Excellent Condition Failed Age $1.00 for PM here is 4 to 5 times more costeffective than here

10 Candidate for PM?

11 Candidate for PM?

12 Candidate for PM? Minor surface defect No structural damage

13 Maintenance Types Pavement Condition Preventive Corrective Reactive Time or Traffic

14 When Should PM be Applied? Good Pavement Condition Poor Preventive Maintenance Defer Action Reconstruction Rehab.. Time (Years)

15 What will PM Do? Good Preventive Maintenance Pavement Condition Poor Time (Years)

16 When is it Too Late for PM? Potholes Severely deteriorated cracks Unstable rutting Shoving Weak structure

17 How Long Would it Last? Pavement Condition Time or traffic

18 Periodic Applications

19 How to Determine Condition Conduct surveys Type, extent, and severity of distress Additional information / historical records Engineering judgment

20 Knees and Elbows Survey

21 Crack treatments Surface treatments Preservation Types Fog seal, chip seal, scrub seal, slurry seal, microsurfacing, ultrathin wearing course Thin/ultrathin HMA overlays Recycling treatments 21

22 When is crack sealing effective? 22

23 Effectiveness of Crack Sealing Distress Type Fatigue Cracking Linear / Block Cracking Stable Rutting Raveling Flushing/Bleeding Roughness Friction Loss Moisture Damage Shoving Extent of Problem Minor Major Effective Marginal No Impact 23

24 When is fog seal effective? 24

25 Effectiveness of Fog Seal Distress Type Fatigue Cracking Linear / Block Cracking Stable Rutting Raveling Flushing/Bleeding Roughness Friction Loss Moisture Damage Shoving Extent of Problem Minor Major Effective Marginal No Impact 25

26 When is chip seal effective? 26

27 Effectiveness of Chip Seal Distress Type Fatigue Cracking Linear / Block Cracking Stable Rutting Raveling Flushing/Bleeding Roughness Friction Loss Moisture Damage Shoving Extent of Problem Minor Major Effective Marginal No Impact 27

28 When is scrub seal effective? 28

29 Effectiveness of Scrub Seal Distress Type Fatigue Cracking Linear / Block Cracking Stable Rutting Raveling Flushing/Bleeding Roughness Friction Loss Moisture Damage Shoving Extent of Problem Minor Major Effective Marginal No Impact 29

30 30 When is slurry seal effective?

31 Effectiveness of Slurry Seal 31 Distress Type Fatigue Cracking Linear / Block Cracking Stable Rutting Raveling Flushing/Bleeding Roughness Friction Loss Moisture Damage Shoving Extent of Problem Minor Major Effective Marginal No Impact

32 When is microsurfacing 32 effective?

33 Effectiveness of Microsurfacing Extent of Problem Distress Type Fatigue Cracking Linear / Block Cracking Stable Rutting Raveling Flushing/Bleeding Roughness Friction Loss Moisture Damage Shoving Minor Major Effective Marginal No Impact 33

34 When is Ultrathin Bonded Wearing 34 Course effective?

35 Effectiveness of Ultrathin Bonded Wearing Course (Novachip) 35 Distress Type Fatigue Cracking Linear / Block Cracking Stable Rutting Raveling Flushing/Bleeding Roughness Friction Loss Moisture Damage Shoving Extent of Problem Minor Major Effective Marginal No Impact

36 36 When is in-place recycling effective?

37 Effectiveness of Cold & Hot In-Place Recycling 37 Distress Type Fatigue Cracking Linear / Block Cracking Stable Rutting Raveling Flushing/Bleeding Roughness Friction Loss Moisture Damage Shoving Extent of Problem Minor Major Effective Marginal No Impact

38 Effectiveness of Milling with Thin HMA Overlay 38 Distress Type Fatigue Cracking Linear / Block Cracking Stable Rutting Raveling Flushing/Bleeding Roughness Friction Loss Moisture Damage Shoving Extent of Problem Minor Major Effective Marginal No Impact

39 Example of Decision Tree Raveling and Weathering Structural Condition Adequate Not Adequate ADT < > Fog Seal or Chip Seal Fog Seal or Chip Seal or Microsurfacing Fog Seal or Microsurfacing Not Appropriate for Preventive Maintenance

40 Factors for Treatment Selection 1. Cost 2. Performance 3. Traffic 4. Other factors 5. Optimization 40

41 AGC Pavement Preservation Committee Pavement Condition Range Qualified Treatments Cost Range

42 Conclusions 1. Applying the treatment on good roads is more cost-effective 2. Treatment effectiveness varies depending on pavement condition 3. Treatment selection should be based on cost, traffic and performance

43 Thanks for your attention! Any Questions?