Concrete Pavement Preservation Guide
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1 Concrete Pavement Preservation Guide Mid West Pavement Preservation Partnership Kansas City, Missouri September 28, 2015 Todd LaTorella Executive Director MO/KS Chapter, ACPA
2 Kurt Smith Applied Pavement Technology Dale Harrington CP Tech Center Course Developers CP Tech Center FHWA and DOT Industry
3 Why Concrete Pavement! Bellefontaine, Ohio 1925
4 Bellefontaine, Ohio Years Old
5 Presentation Outline Introduction: Pavement Preservation Background: Concrete Pavement Preservation Guide Guide Contents and Highlights Status and Future Plans
6 Introduction: Pavement Preservation Proactive means of managing pavement condition (before severe deterioration occurs) Focus on extending pavement life and restoring functional condition Benefits: Cost savings Improved pavement conditions Increased functional performance (e.g., smoothness, safety, noise) Reduced environmental impacts
7 Pavement Preservation Window
8 Favorable Characteristics for Preservation Few or limited structural problems No materials-related distress Pavements in overall relatively good condition
9 Background: Concrete Pavement Preservation Guide Original manual developed 2008 & updated in 2014 CP Tech Center (FHWA sponsorship) Recommendations on: Pavement evaluation Treatment application, design, construction 13 state DOT workshops held throughout U.S.,
10 New Preservation Guide CP Tech Center (FHWA sponsorship) Goals: Update 2008 Guide in 2014 Incorporate recent developments Expand certain topics Add chapter on concrete overlays Published September 2014
11 Technical Committee Organization Number of Participants FHWA 2 State DOTs 5 Industry 9 University 2
12 Chapters/Topics in Guide 1. Introduction 2. Pavement Preservation Concepts 3. Concrete Pavement Evaluation 4. Slab Stabilization 5. Partial-Depth Repairs 6. Full-Depth Repairs 7. Retrofitted Edge Drains 8. Dowel Bar Retrofit 9. Diamond Grinding and Grooving 10. Joint Resealing and Crack Sealing 11. Concrete Overlays 12. Strategy Selection
13 Guide Highlights Treatment Commentary CommonTreatments Full-depth repairs Dowel bar retrofit Diamond grinding Partial-depth repair Joint sealing Growing Treatments Cross stitching Thin Concrete Overlays Less Common Treatments Slab stabilization Retrofitted edge drains
14 Guide Highlights Partial-Depth Repairs Removal and replacement of small, shallow areas of deteriorated concrete Expanded use as repair technique Greater use of milling for preparation Productivity Bonding New patching materials
15 Guide Highlights Full-Depth Repairs Workhorse treatment Removal/replacement of concrete pavement at deteriorated joints/cracks Renewed focus on workmanship Dowel bar installation Need for rapid opening times Accelerated materials Precast repairs
16 Guide Highlights Precast Concrete Repairs Advantages Better quality concrete Controlled curing Minimal weather impacts Rapid opening Experience in CA, CO, DE MI, MN, MO, NJ, NY IL, TX, UT, VA (add KS) Good performance to date
17 Guide Highlights Utility Cut Repairs Opening street to gain access to utilities On-going issue of returning pavement to good condition Guidance on: Sizing cuts Creating/removing Jointing Backfilling Embedded steel Opening to traffic
18 Guide Highlights Dowel Bar Retrofit Installation of dowel bars in existing joints to improve load transfer Increased use on cracks Renewed focus on patching materials Durability Shrinkage
19 Guide Highlights Cross Stitching Accepted treatment for Early longitudinal cracks in new construction Longitudinal cracks in older pavements Misaligned tie bars Advantages: Quick and easy to install Less intrusive Good performance
20 Guide Highlights Diamond Grinding Removal of thin layer of concrete to restore smoothness Boon to concrete pavement preservation Diamond grinding texturing families Conventional City street Texture grind NGCS
21 Guide Highlights Next Generation Concrete Surface (NGCS) Manufactured concrete pavement surface Uses conventional grinding equipment in two-phase operation Flush grinding Longitudinal grooving Low-noise surface New and rehabilitated pavements
22 Guide Highlights Concrete Overlays Thin concrete overlays for preservation improvements Bonded only 3 to 4 inches thick (preservation) Unbonded 4 inches 6 inches (minor rehabilitation) 6 inches (major rehabilitation)
23 What s New Increased Importance Placed on PMS Inclusion of Chapter on Concrete Overlays Updated Equipment Technologies: GPR MIT SCAN, MIRA, etc Incorporated new PDR Techniques Inclusion of FHWA ASR Initiatives Inclusion of Precast Repairs, Utility Cuts, and CRCP Guidelines Emphasis on Noise Surface: NGCS
24 And Now Ready For Implementation
25 Planned CP Tech Center Pavement Preservation Workshops Date October 5-8, 2015 October 20, 2015 October 19-22, 2015 November 4-5, 2015 December 14-17, 2015 March 28-31, 2016 Location Northern California Illinois Southern California Nebraska North Dakota State of Washington
26 Web Based Training Module
27 Other Resources
28
29 CP Tech Center
30
31
32 Thank You!
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