1 / 33

Chapter 3 Framework for Treatment Selection

Chapter 3 Framework for Treatment Selection. From… Maintenance Technical Advisory Guide (MTAG). Introduction to Pavement Treatment Selection. What is Treatment Selection ? Why use Treatment Selection?. What is Treatment Selection.

zinnia
Télécharger la présentation

Chapter 3 Framework for Treatment Selection

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 3Framework for Treatment Selection From… Maintenance Technical Advisory Guide (MTAG)

  2. Introduction to Pavement Treatment Selection • What is Treatment Selection ? • Why use Treatment Selection?

  3. What is Treatment Selection A guide to assist maintenance personnel in making better and more informed decisions in selecting and applying maintenance treatments

  4. Why Use A Treatment Selection Process • Covers all the major treatment types currently used by Caltrans for flexible pavements and allows for inclusion of future strategies • Treatment Selection is a complex, yet important procedure to ensure a optimum pavement treatment

  5. Factors Affecting Treatment Selection • Pavement age, condition • Traffic levels, expected future plans • Available funding • Agency policy

  6. Treatment Selection based on Pavement Condition

  7. Treatment Selection based on Minimum Cost, Optimum Timing

  8. Issues Treatment Selection Addresses • Will the treatment address the distresses present? (i.e., Will it work?) • Can the required preparation for the treatment be carried out? • Is the treatment cost effective? • Will the treatment be performed before the situation being addressed changes?

  9. Treatment SelectionTraining Modules Available • MTAG Treatment Selection • Life Cycle Cost Analysis (to be developed later)

  10. End Overview

  11. Module 3-1 Treatment Selection From… Maintenance Technical Advisory Guide (MTAG)

  12. General Strategy Selection Process • Factors to consider • Pavement performance curves • Selection of appropriate treatments • Timing of the treatment

  13. Seals (Fog, Slurry, Chip) Crack Seal/Fill Micro-Surfacing Thin HMA Overlays Bonded Wearing Course Surface Recycling Crack & Joint Re-Seal Partial & Full Depth Repair Dowel Bar Retrofit Diamond Grinding & Grooving Under-Sealing Typical Caltrans Treatments AC PCC www.dot.ca.gov/hq/maint/MTA_guide.htm

  14. Treatment Selection Based on Pavement Condition

  15. Caltrans Approach to Selecting Maintenance Treatments • Assess Existing Pavement Conditions • Determine the Feasible Treatment Options • Analyze and Compare the Feasible Options

  16. Caltrans Approach to Selecting Maintenance Treatments • Assess Existing Pavement Conditions • Conduct visual site inspection and/or review project information • Perform testing on the existing pavement, as conditions require • Define the performance requirements for the treatment

  17. Caltrans Approach to Selecting Maintenance Treatments Caltrans Pavement Condition Survey Table

  18. 2006 Maintenance Directive • Basis for Caltrans Maintenance Program • Annual contract maintenance program • Evaluate applicability of various treatments • Comparison based upon pavement condition environmental factors • Evaluates applicability based upon type of distress condition as well as extent of cracking

  19. Maintenance Selection – Detailed Example

  20. Maintenance Selection on Cracks - Overview

  21. Guidelines for Effective Treatments on Cracks – Detailed Example

  22. Caltrans Approach to Selecting Maintenance Treatments • Analyze and Compare the Feasible Options • Several treatments may be feasible • Cost and life of the treatments vary • Effect of the treatment on the life extension of the existing pavement • Other factors to consider: cost effectiveness, treatment timing, traffic level, and constructability

  23. Estimated Life of Treatments

  24. Approach for Selecting Maintenance Treatments • Cost Effectiveness • Equivalent Annual Cost • Life Cycle Cost Analysis • Selection of Maintenance Treatments • Performance and constructability • Customer satisfaction • Ranking of selected treatments by rating overall importance

  25. Rating Evaluation Worksheet

  26. Rating Evaluation Example

  27. LCCA Lives of Treatments Cost of Treatments User Costs • Cost Effectiveness of Treatments • Cost of Pavement Preservation vs. Rehabilitation Revised Strategy Selection Process Proposed LCCA Analysis

  28. LCCA Elements for Pavements • Type and life of maintenance and rehabilitation treatments • Agency costs • User costs (auto repairs, safety, delays) • Salvage value • Time value of money (present net value vs. annual cost)

  29. Proposed Additions to the Strategy Selection Process • Selected updates to the Matrix for Flexible Pavements (estimated treatment lives and costs) • Effect of pavement condition, traffic and Climate on treatment lives

  30. Discussion of Process • Guidelines for Selection of Pavement Preservation Treatments • Inclusion of LCCA and Strategies for Concrete Pavements Preservation • Peer Reviewed (PPTG, FHWA, Caltrans PST)

  31. Conclusions • Caltrans developed the MTAG, a dynamic, flexible document that is updated as needed • The strategy selection process is now a standard practice for use by maintenance personnel MTAG – www.dot.ca.gov/hq/maint/MTA_guide.htm

  32. Questions?

More Related