Gary Hicks - Pavement Preservation Strategies
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Gary Hicks - Pavement Preservation Strategies

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Presentation delivered at the CalAPA Spring Asphalt Pavement Conference April 9-10, 2014 in Ontario. Topic: Pavement preservation strategies, incuding a new software developed by the Pavement ...

Presentation delivered at the CalAPA Spring Asphalt Pavement Conference April 9-10, 2014 in Ontario. Topic: Pavement preservation strategies, incuding a new software developed by the Pavement Preservation Center at CSU Chico to assist in identifying pavement preservation strategies.

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Gary Hicks - Pavement Preservation Strategies Gary Hicks - Pavement Preservation Strategies Presentation Transcript

  • Strategy Selection Process Developed by the CP2 Center By R. Gary Hicks and Ding Cheng CP2 Center, CSU, Chico for the Spring California Asphalt Pavement Conference April 9-10, 2014
  • • Types of Treatments • Strategy Selection Process • Case Studies • Summary and recommendations Much of this work has been supported by Caltrans Overview of Presentation 2
  • 3 Condition Time $1-3 for preventive maintenance here Costs $10-20 or more when it’s done as rehab Cost Effectiveness Pavement Preservation
  • What is Treatment Selection? 4 A guide to assist maintenance personnel in making better and more informed decisions in selecting and applying maintenance treatments In other words… What do we do with this?
  • Treatment Selection Based on Pavement Condition 5
  • Issues Treatment Selection Addresses 6 • 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?
  • Strategy Selection Process • Assess Pavement Conditions • Determine Feasible Treatment Options • Analyze and Compare Feasible Options 7
  • Assess Current Conditions 8 • 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
  • Fatigue (Alligator) Cracking 9 LOW MODERATE HIGH Load Related, HMA Thickness
  • Rutting and Depressions 10 Ruts in Wheel Paths Depression Load + Environmental Typically Upper 4 in. Support Issue Typically Full Depth
  • Transverse and Block Cracking 11 Thermal Cracking Block Cracking Environmental Early in Pave. Life Environmental + Age
  • Factors Affecting Treatment Selection 12 • Pavement age and condition • Climate • Traffic levels, expected future plans • Available funding • Agency policy • Availability of Contractors
  • Treatment Selection Matrix 13 • 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 • CP2 Center has developed a program to do this for you
  • User Interface – Main Page 14
  • •Treatment Life •Treatment Cost •Interest Rate Equivalent Annual Cost 15
  • Advantage of the Preliminary Developed Expert System • Uses Caltrans MTAG existing decision matrix • Can deal with more complex scenarios? • Knowledge is retained to the system • New treatments and costs can be added at any time 16
  • Case Histories Provided by LA County • Information needed: – Type and extent of distress prior to treatment – Traffic level, ADT or TI – Climate or environment region – Cost and estimated treatment life
  • Imperial Highway – Shoemaker Avenue/Valley View Avenue (RD 446) • PCI of 57 (Evaluation Date: 8/29/2011) • Predominant distresses consist of 40% moderate alligator cracking • Traffic Index = 10 • Environment Region- South Coast Mediterranean climate
  • Imperial Highway
  • Overhill Drive – Slauson Avenue/Stocker Street (RD 233) • PCI of 59 (Evaluation Date: 4/16/2013) • Predominant distresses consists of 10% slight alligator and 50% slight map cracking • Traffic Index= 7 • Environment Region- South Coast Mediterranean climate
  • Overhill Drive
  • Via Marina – Washington Street/1727 Bora Bora Way (RD 433) • PCI of 73 (Evaluation Date: 10/27/2011) • Predominant distresses consists of 30% slight map cracking • Traffic Index = 8 • Environment Region- South Coast Mediterranean climate •
  • Via Marina
  • What Strategy Would be Best for Each Case? • Imperial Highway- Heavy cracking and traffic • Overhill-Medium cracking and intermediate traffic • Via Marina-Light cracking and traffic http://ceresearch.ecst.csuchico.edu/Treatment Selection2.0/View/LoginPage.aspx
  • Imperial Highway
  • Overhill Drive
  • Via Marina
  • Discussion of Results • Projects – Imperial Highway – Overhill Drive – Via Marina • Alternatives – Preservation – Rehab – Reconstruction
  • Summary • Types of Surface Treatments • Strategy Selection Process Using Life Cycle Cost • Case Histories • Aids in making better decisions 29
  • For More Information • Check with Ding Cheng, the developer of the program • The Center can provide training on the use of the program • We can also customize it to fit your needs
  • Any Questions? rghicks@csuchico.edu 530-588-4446 and dxcheng@csuchico.edu 530-588-0155 31 www.cp2info.org/Center