Local Calibration of “C-Values” for Common Idaho Soil Types for Use in Mechanistic-Empirical Pavement Design

This project will collect C-Value data from Idaho Transportation Department (ITD) projects over time. The C-Value is a ratio utilized by AASHTOware software to correlate laboratory-established resilient moduli with moduli back-calculated from field tests. There are three hierarchal levels of data accuracy for pavement mechanistic-empirical (ME) roadway design methodology, which is currently used by ITD. Level 1 is site or project-specific. Level 2 is based on local data. Currently, ITD uses Level 3 C-Values, which are a best estimate for a global default value. Developing a database of C-values within a dedicated stand-alone project would be cost prohibitive due to the costs of labor, traffic control, drilling, testing, and data processing involved. However, if C-values are leveraged from projects that are already planned or in process over the course of three years, a reliable database of C-Values can be created and maintained in a more cost-effective manner. Establishing this database of accurate C-values will allow for more specific and reliable data available to project designers. The main objectives of this project include collecting C-Value data from ITD projects over a three-year period and incorporating those values into a database for use by ITD, LHTAC, local highway districts, and Idaho municipalities.

• Record URL:
  https://apps.itd.idaho.gov/apps/research/Completed/RP289.pdf
• 

Language

• English

Project

• Status: Completed
• Funding: $36000
• Contract Numbers:

  RP 289

• Sponsor Organizations:

  Idaho Transportation Department

  P.O. Box 7129, 3311 West State Street
  Boise, ID  United States  83707-1129
• Project Managers:

  Coy, Tyler

• Performing Organizations:

  Shannon & Wilson

  5260 W Chinden Blvd.
  Boise, ID  United States  83714
• Principal Investigators:

  Crawforth, Stanley

  Kassem, Emad

• Start Date: 20200423
• Expected Completion Date: 20220430
• Actual Completion Date: 20220430

Subject/Index Terms

• TRT Terms: Calibration; Data collection; Mechanistic-empirical pavement design; Modulus of resilience; Soil types
• Identifier Terms: Mechanistic-Empirical Pavement Design Guide
• Geographic Terms: Idaho
• Subject Areas: Data and Information Technology; Design; Highways; Pavements;

Filing Info

• Accession Number: 01759897
• Record Type: Research project
• Source Agency: Idaho Transportation Department
• Contract Numbers: RP 289
• Files: RIP, STATEDOT
• Created Date: Dec 10 2020 2:40PM