Concrete Pavement Preservation Manual Update

Transcription

1 Concrete Pavement Preservation Manual Update 8th TxDOT-CCT Concrete Conference September 28-30, 2014 Austin, Texas Iowa Concrete Paving Association Workshop February 3, 2017

2 Update Concrete Pavement Preservation Manual- Winter 2014 Contains 12 Chapters on Preservation Techniques Added Overlay Chapter Working on 11 Training Modules and Instructor Guide Plan on 20 future workshops in next two years. Technical Assistance to State DOTs

3 Concrete Pavement Preservation Manual Complete Modules in Winter Introduction 2. Preservation concepts 3. Pavement evaluation techniques 4. Slab stabilization and slab jacking 5. Partial-depth repairs 6. Full-depth repairs 7. Retrofitted edge drains 8. Load transfer restoration 9. Diamond grinding and grooving 10. Joint /crack sealing 11. Overlays 12. Strategy Session

4 Chapter 1: Introduction Changes: Purpose and Objectives Describes Updates and Revisions

5 Chapter 2: Preventive Maintenance and Pavement Preservation Concepts New Additions: Pavement Management Importance Trigger Values in Identifying Candidate Pavements Incorporation of Recent Research (e.g., SHRP R26)

6 Preservation/Rehabilitation Chart Preservation

7 Pavement Condition Pavement Management Concept $X/mile $~4X/mile $~6-10X/mile 40% of life 70% of life 90% of life $>10X/mile Pavement Age 7

8 Design Life The pavement design life is the predicted time it will take for the pavement to reach a minimum acceptable condition value. It is important to note that all current pavement design methods base the minimum acceptable condition on functional service criteria provided by a pavement (not an extreme condition that represents severe structural defects or prevents vehicle passage).

9 Service Life LONG-TERM PAVEMENT PDR and/or DG

10 Typical Performance of Selected Preservation Treatments Treatment Expected Performance (treatment life), years Concrete joint resealing 6 to 8 Concrete crack sealing 6 to 7 Diamond grinding 8 to 15 Diamond grooving 10 to 15 Partial-depth concrete patching 10 to 20 Full-depth concrete patching 10 to 20 Dowel bar retrofit 10 to 15 Table 2.5 on p

11 5 Core Questions 1. What is the current state of our pavements? What do we own? Where is it? What condition is it in? What is the remaining service life and economic value? 11

12 5 Core Questions 2. What is the level of service to be provided? What do owners and public expect? How different is this from actual conditions? 12

13 5 Core Questions 3. What level of deterioration is acceptable? How do these assets deteriorate? What are the likelihood and consequences of deterioration? 13

14 5 Core Questions 4. What are the feasible options to consider? What repair options are most feasible for our agency? How do these strategies impact system performance? 14

15 5 Core Questions 5. Which long-term funding opition should be selected? Does the selected strategy align with policy goals? 15

16 Trigger/Limit Values for Pavement Preservation (JPCP) Performance Indicator Trans. Cracking Joint Spalling Joint Faulting Trigger Value % of slabs cracked % of joints 0.10 inches Limit Value 5-15% of slabs cracked 15-20% of joints inches Roughness in/mi in/mi 16

17 Chapter 3: Concrete Pavement Evaluation New Additions: Information on Joint Distress Study Update on nondestructive test-gpr, MIT Scan, MIRA (ultrasonic pulse velocity-cracks or void detection) Inclusion of FHWA - ASR Initiatives Ground penetrating radar, Magnetic Imaging Technology,

18 Purposes of a Pavement Evaluation Provides qualitative information to: - Determine causes of deterioration - Determine if pavement is not a candidate for preservation - Develop appropriate alternatives Provides quantitative information for: - Quantity estimates - Assessment of deterioration rates - Performing life-cycle cost analyses

19 Project Evaluation Approach 1. Historical data collection/records review 2. Initial site visit and assessment 3. Field testing activities 4. Laboratory materials characterization 5. Data analysis 6. Final field evaluation report

20 Chapter 4: Slab Stabilization and Slab Jacking

21 Slab Stabilization vs. Slab Jacking Slab Stabilization: - Pressure insertion of grout/polyurethane to fill void beneath slab Slab Jacking: - Pressure insertion of grout/polyurethane to raise slab Grout or polyurethane

22 Chapter 5: Partial Depth Repairs New Additions: Incorporate New PDR Techniques (2012CP Center Guide) Update on PDR Materials (resins)

23 Concrete Removal Cold Milling Heads V Shape Milling Head and Pattern Rock Saw and Rounded Pattern Vertical Edge Mill Head and Pattern 30 to 60 degrees

24 Chapter 6: Full-Depth Repairs

25 Full Depth Repairs New Additions: Precast Repairs Utility Cuts CRCP Guidelines

26 Chapter 7. Retrofitted Edge Drains

27 Retrofitted Edge Drains New Additions: Streamlining of Information Importance of Maintenance

28 Chapter 8: Dowel Bar Retrofit, Cross Stitching, and Slot Stitching

29 Dowel Bar Retrofit Restores load transfer Reduces probability of pumping, faulting, and corner breaks Improves long-term rideability Increases service life

30 Load transfer Restoration New Additions: Update Long term Performance of DBR Update Cross Stitching and Slot Stitching

31 Chapter 9: Diamond Grinding and Grooving

32 Diamond Grinding and Grooving New Additions: New Diamond Grinding Heads New Information on Slurry Management Update on Equipment Capabilities Introduce Next Generation Concrete Surface

33 New Surface Textures Optimized Texture for City Streets (OTCS) - Similar to diamond grinding but reduced land heights/widths Next Generation Concrete Surface (NGCS) - Manufactured, low-noise surface consisting of flush grinding and grooving OTCS NGCS

34 Chapter 10: Joint Resealing and Crack Sealing New Additions: General Chapter Update Improve Troubleshooting

35 Ch. 11: Concrete Overlays New Additions: New Chapter Information from 2014 Overlay Guide Update Lessons Learned From Projects (2008 to 2014)

36 Types of Concrete Overlays 11-36

37 Chapter 12: Strategy Selection New Additions: Sustainability Considerations How key Concepts Enter into Selection Update Selection Process and Treatment

38 Questions