COLD IN-PLACE RECYCLING

Transcription

1 COLD IN-PLACE RECYCLING Southeast Pavement Preservation Partnership Stephen Damp, P.Eng. Senior Vice President, The Miller Group Thursday, May 8, 2008

2 Presentation Overview Definition of Cold In-Place Recycling (CIR) Advantages of CIR Candidate selection criteria Pavement analysis Sample tender forms and specifications Construction Performance of CIR

3 Definition of CIR CIR is a component of the overall pavement structure which is produced by mining the existing asphalt pavement layers to create a new pavement layer.

4 Definition of CIR - From a Pavement Preservation perspective, CIR is not designed to enhance the structural capacity of the pavement - CIR is predominantly (preferred %) working in the existing asphalt pavement structure. Essentially recycling asphalt coated particles.

5 Three Unit CIR Train

6 Three Unit CIR Train

7 Two Unit CIR Train

8 Single Unit CIR Train

9 Single Unit CIR Train

10 Advantages of CIR In order to be useful it must: Be cost effective Produce a new pavement that will perform under future traffic conditions It also provides: - Convenient Construction - Environmentally Beneficial Construction

11 Engineering Condition Curve Hot In-place Recycling Cold In-place Recycling Condition Pavement Preservation Pavement Rehabilitation Pavement Reconstruction Cold Recycling Full Depth Reclamation & Stabilization Time

12 Candidate Selection Criteria Existing pavement s structural capacity Underlying pavement bearing capacity Material quality Longitudinal and transverse profile

13 Pavement Analysis A complete pavement analysis organized by the owner typically includes consultation from the owner agency s s staff, contractors and consulting engineers to perform a: Preliminary visual inspection Coring and laboratory analysis of existing materials Structural assessment

14 Pavement Analysis Preliminary Visual Inspection Construction limits Structural adequacy level Longitudinal and transverse profile Historical review of in-place materials Constructability Traffic loading Cost effectiveness

15 Candidate Selection Criteria - Visual

16 Candidate Selection Criteria - Visual

17 Candidate Selection Criteria - Visual

18 Coring and Lab Analysis Depths of pavement layers Extracted Asphalt cement Content Penetration Recycled Asphalt Pavement (RAP) aggregate Extracted gradation Physical properties

19 Structural Assessment Load bearing capacity tests Characteristics of supporting pavement layers Falling Weight Defelctometer (FWD) Dynamic Cone Penetrometer (DCP)

20 Sample Tender Forms and Specifications Governing document is Ontario Provincial Standard Specification for CIR (OPSS 333) ubs/ops.nsf/opshomepage

21 Sample Tender Forms and Specifications Ministry of Transportation Ontario

22 Sample Tender Forms and Specifications

23 Sample Tender Forms and Specifications

24 Construction

25 Construction

26 Construction

27 Post Construction

28 Post Construction

29 Interval (m) LElev. IRI (m/km) RElev. IRI (m/km) 0 to to 1, ,000 to 1, ,500 to 2, ,000 to 2, ,500 to 3, ,000 to 3, ,500 to 3, Roughness Range (m/km) Percent of Pavement Before Grinding (%) Percent of Pavement After Grinding (%) Above to to to to to to to IRI on CIP before simulating a grinder pass at approx. 10mm %age improvement proval simulator indicates through software. Location (m) 0.00to 3646 Profilograph Grinding simulation results Max IRI Before Grinding (m/km) Approx 780 Max IRI After Grinding (m/km) Approx 435

30 Post Construction

31 ProVAL Report - Hwy 23 COLD IN PLACE PROFILE NB Analysis - Ride Statistics at Intervals Channel Title IRI (m/km) AVG ProVAL Report - HWY 23 SP12.5 FC1 ONE LIFT PAVING ON CIP HIGHWAY23-NB NB- 0.0 to Channel Title IRI (m/km) AVG LElev RElev LElev PI=740 RElev PI=350 Analysis - Ride Statistics at Intervals Interval (m) LElev. IRI (m/km) RElev. IRI (m/km) Analysis - Ride Statistics at Intervals Interval (m) LElev. IRI (m/km) RElev. IRI (m/km) 0 to

32 Performance of CIR Reflective Cracking

33 Performance of CIR Reflective Cracking

34 CIR 5 Years Later

35 Cold in Place Recycling CIR Pavement Preservation Project 20,000 AADT

36 COLD IN-PLACE RECYCLING Southeast Pavement Preservation Partnership Stephen Damp, P.Eng. Senior Vice President, The Miller Group Thursday, May 8, 2008