Effective Efficient and Elegant Pavement Widening with Full Depth Reclamation

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1 Effective Efficient and Elegant Pavement Widening with Full Depth Reclamation Mike Coggins Region 5 Materials Engineer & Resident Engineer February 24, 2012

2 Talking Points Politics and Projects What can FDR do for you? Economic & Environmental Benefits CDOT Implementation of FDR Emulsified Asphalt added to FDR Next Steps

3 Interstate Highway System Eisenhower pushed for the building of an interstate highway system and in 1956 signed the Federal- Aid Highway Act. 56 years old in 2012

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6 2020

7 Franklin D. Roosevelt Promised America a New Deal Jobs bill of WPA PWA CCC NRA REA

8 Franklin D. Roosevelt Promised America a New Deal Jobs bill of WPA PWA CCC NRA REA Works Progress Administration

9 Franklin D. Roosevelt Promised America a New Deal Jobs bill of WPA PWA CCC NRA REA Works Progress Administration Public Works Administration

10 Franklin D. Roosevelt Promised America a New Deal Jobs bill of WPA PWA CCC NRA REA Works Progress Administration Public Works Administration Civilian Conservation Corps

11 Franklin D. Roosevelt Promised America a New Deal Jobs bill of WPA PWA CCC NRA REA Works Progress Administration Public Works Administration Civilian Conservation Corps National Recovery Administration

12 Franklin D. Roosevelt Promised America a New Deal Jobs bill of WPA PWA CCC NRA REA Works Progress Administration Public Works Administration Civilian Conservation Corps National Recovery Administration Rural Electric Association

13 New Economy Sustainability & Materials FDR WMA HMA HIPR CIPR RAP RAS AEFDR

14 Full Depth Reclamation Dry grinding is a practical way to rehabilitate pavements. Incorporation of RAP into the aggregate base course provides improved structural integrity, increases reliability and preserves the original investment in the roadway.

15 Pulverizing

16 Mixing

17 Grading

18 Compaction Compaction

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20 Full depth reclamation is an effective pavement rehabilitation treatment on highly distressed roads needing deep repairs.

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22 Keys to Success 1.Reclaimed material shall be mixed with ABC Class 6 in the widened sections and processed across the entire roadway section. 2.Water shall be injected into the mix through the drum and thoroughly mixed into the full depth reclamation process to obtain moisture content. 3.Contractor required to incorporate additional ABC Class 6 into the processed material to provide a minimum of 10 inches as needed to meet final grade.

23 Benefits of FDR Widening and Flattening

24 Benefits of FDR Drainage Improvements

25 Benefits of FDR Drainage improvements Capture subsurface drainage

26 Benefits of FDR Balance Earthwork

27 Benefits of FDR Safety improvements Super elevation corrections Passing lanes

28 Benefits of FDR Roadbed stabilization Subgrade stabilization Muck excavation

29 Benefits of FDR Proofrolling

30 Environmental Benefits Reuse/continued use of initial roadway investment

31 Decreased Use of Materials 100% Recyclable Decreases required quantity of crushed aggregates from pits Decreases extraction of rock from the earth Decreases asphalt cement binder required to construct roads Saves $15-25 per ton depending upon haul distances $

32 Number of CDOT FDR Projects Per Year

33 CDOT FDR Area Treated per Year (SY) 1,500,000 1,125, , ,

34 Total Cost of FDR by Year

35 FDR Area Treated per Year (SY)

36 Where do we go from here?

37 Asphalt Emulsion Full Depth Reclamation (AEFDR) is an asphalt pavement rehabilitation process that recycles and rejuvenates the existing pavement surface and subgrade, providing an improved structure for the final paved surface.

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40 Keys to AEFDR Success 1.AEFDR is a separate process. 2.Asphalt emulsion shall be added in the drum of the reclaimer equipment. 3.Emulsion shall be thoroughly mixed into the reclaimed material for a thickness of not less than 6 inches across the entire roadway.

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43 What do we gain? FDR = 0.15 structural coefficient AEFDR = 0.25 structural coefficient

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46 AEFDR is a cost effective pavement rehabilitation technology that could enhance available options for treating fatigued pavements and implement practical pavement

47 Problems? Do not doubly apply

48 Concerns? Softening in the heat

49 Region 5 FDR Projects

50 Questions?