Temperature and Humidity Effects on the Co-efficient of Friction Value After Application of Liquid Anti-icing Chemicals
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Temperature and Humidity Effects on the Co-efficient of Friction Value After Application of Liquid Anti-icing Chemicals

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  • English
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    • Creators:
      Leggett, Timothy S.
    • Corporate Creators:
      Forensic Dynamics Inc
    • Subject/TRT Terms:
    • Resource Type:
      Research Paper
    • Corporate Publisher:
      Pacific Northwest Snowfighters Association
    • Abstract:
      The purpose of this research was to determine whether there existed a chemical 'slipperiness' as a result of a transition from liquid to a solid, and vice versa, of typical anti-icing chemicals presently in use. Experiments were carried out in May to August, 1999 in Kamloops, B.C. in a purpose-oriented climate-controlled test facility. The tests were necessary to fully establish the reliance of various anti-icing chemicals on temperature and humidity; specifically to determine what role these, and other factors, play on the road co-efficient of friction. Initially, the facility was run within the limits of 30% - 50% humidity, and -1E to 10E Celsius. Later, testing was performed at humidity levels in the lower range, (between 20% and 40%, with temperature held constant at 5E Celsius). The climate-controlled test facility was specifically engineered and built for the testing purpose. It consists of a sandblasted glass surface laid inside a tray, upon which a B.F. Goodrich drag sled is pulled. Measurements are recorded via a Mettler-Toledo load cell with an accuracy of .001 lbs. force. Temperature and humidity are held at chosen levels via PC software, linked with a compressor and chiller unit, along with a 1.5 kilowatt electric heater. Humidity is controlled similarly with the use of a standard humidifier and evaporation tray, upon which a chemical used for drying, (ie. de-humidifying) can be placed. Originally, four pure chemicals were tested. These included magnesium chloride, calcium chloride, calcium magnesium acetate and sodium chloride. Additionally, the following chemicals were tested: Ice Stop and Ice Stop 2000, MCP De-Icer, LiquiDow Armor, FreezGard 0, FreezGard 0 and TEA, FreezGard 0 and SHIELD LS, and finally, FreezGard 0 and Ice Ban. Figures, tables, 35 p.
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