12-03: Understanding the Chemical and Mechanical Performance of Snow and Ice Control Agents on Porous or Permeable Pavements

Problem

Winter maintenance field personnel have reported several issues related to pavement performance when applying snow and ice control agents on porous or permeable asphalt pavement surfaces.

These pavement surfaces appear to refreeze more quickly and stay wet longer than other pavements. Field personnel report that they require 25 to 30 percent more deicing agent, and that in some conditions these pavements refreeze well after the conclusion of snow and ice control activities.

Objective

This project provides information and guidelines to help determine the optimum maintenance strategies for porous or permeable asphalt pavements, including:

  • Dense graded pavements
  • Open graded pavements
  • Ultrathin Friction Course

Results

This project was closed out after reaching the five year maximum time limit for contracts, per the State of Minnesota Statutes. Because of this, not all deliverables were able to be completed and approved by the Clear Roads Technical Advisory Committee (TAC).

The following deliverables (also posted under Final Products) include:

  • Task 6: White Paper on Chemical and Mechanical Interactions (98% complete)
  • Task 7: Synthesis of Best Practices (95% complete)
  • Task 8: Field Testing Recommendations (75% complete)
  • Task 9: Final Report (50% complete – not approved by TAC)
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