Heated Pavements: Phase Change Materials

It was shown in previous work (Task 1C) that phase change materials (PCMs) can be used in concrete pavement to alter anti-icing practices, being successfully and economically used to delay or prevent ice formation. The incorporation of PCMs in lightweight aggregate (LWA) is a promising approach to mitigate ice formation in concrete pavements; however, only medium size laboratory tests were conducted in Task 1C. This research will place full-size concrete slabs at an Indiana airport. In addition, slabs will be produced in Oregon to further evaluate existing models for the interpretation of data from the field sites. The work will focus on documenting full-scale construction practices, measuring properties of field manufactured concrete using LWA with PCM, monitoring temperature in the pavement slabs and at the paving sites, and ice formation at the paving locations over the course of the project. The work will also extend laboratory durability testing as well as extending the modeling to indicate airport locations where the use of PCM (passive heating) has the greatest economic viability and potential success. This is the next logical step in extending this work to the field. While the previous work with PCC examined the potential for using porous aggregate with PCM, work completed thus far in Task 1E determined that porous aggregate containing PCM cannot be used to incorporate PCM in asphalt mixtures. The PCM interacts with asphalt binder, to the detriment of the system. The research team therefore had to seek alternative methods for incorporating PCM in asphalt pavements. The most promising method is encapsulation of the PCM by some sort of shell material that can withstand the temperatures of asphalt mixture production and placement. When the original Task 1E proposal was written and approved, the extensive work required to develop a viable method for incorporating PCM in asphalt pavement was not anticipated. As the research proceeded additional work beyond the original scope of the project was required. This research proposal includes additional monies and time to complete Task 1E. To complete Task 1E, a series of laboratory specimens will be prepared that demonstrate how PCM can be used in asphalt pavement or in a layered asphalt pavement system. Data obtained will be used to assess the heat capacity, thermal conductivity, and liquidus temperature of the PCM in the asphalt. Additionally, a series of large-scale specimens will be produced and exposed to a range of temperatures and humidities. The work will also evaluate conditions (i.e., rate of heat decrease or precipitation rate) where PCM may not be sufficient to reduce ice formation. Lastly, the final report from Task 1E will be completed and contain the research findings and recommendations for implementation.

Language

• English

Project

• Status: Completed
• Funding: $210000
• Contract Numbers:

  12-C-GA-PU-057

• Sponsor Organizations:

  Federal Aviation Administration

  William J. Hughes Technical Center, Atlantic City International Airport
  Atlantic City, NJ  United States  08405
• Project Managers:

  Mahaffay, Benjamin

• Performing Organizations:

  Purdue University, Lyles School of Civil Engineering

  550 Stadium Mall Drive
  West Lafayette, IN  United States  47907
• Principal Investigators:

  Haddock, John

• Start Date: 20170707
• Expected Completion Date: 20190706
• Actual Completion Date: 20190706

Subject/Index Terms

• TRT Terms: Airport runways; Anti-icing; Asphalt pavements; Conducting materials; Lightweight aggregates; Pavement design
• Subject Areas: Aviation; Design; Materials; Pavements;

Filing Info

• Accession Number: 01661832
• Record Type: Research project
• Source Agency: Partnership to Enhance General Aviation Safety, Accessibility and Sustainability
• Contract Numbers: 12-C-GA-PU-057
• Files: RIP, USDOT
• Created Date: Mar 2 2018 1:32PM