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Anti-icing Study at Anti-icing Study at O’Hare International AirportO’Hare International Airport
Professor: Barry J. DempseyProfessor: Barry J. DempseyGraduate Asst.: Nathan M. CarrollGraduate Asst.: Nathan M. Carroll
BRIEF HISTORYBRIEF HISTORY
Winter of 2002, phase I testing began on Winter of 2002, phase I testing began on textured aggregate coatings.textured aggregate coatings.
These Anti-icing Smart Pavement Overlays These Anti-icing Smart Pavement Overlays were evaluated for durability.were evaluated for durability.
Preliminary observations demonstrate Preliminary observations demonstrate feasibility of installation process and feasibility of installation process and durability.durability.
Phase II began with installation of Phase II began with installation of observation bed at O’Hare.observation bed at O’Hare.
THE THEORYTHE THEORY
The pavement overlay is placed on an The pavement overlay is placed on an existing pavement surface.existing pavement surface.
Anti-icing chemical is applied prior to icing Anti-icing chemical is applied prior to icing conditions.conditions.
Icing conditions occur.Icing conditions occur. Anti-icing chemical are released from Anti-icing chemical are released from
pavement.pavement. Ice melts.Ice melts.
OUR GOALOUR GOAL
To perform a comprehensive observation of the To perform a comprehensive observation of the test pavement under controlled conditions. test pavement under controlled conditions.
To perform complete analysis of all recovered data To perform complete analysis of all recovered data to determine the durability, performance and to determine the durability, performance and surface friction characteristics of the anti-icing surface friction characteristics of the anti-icing pavement.pavement.
OBSERVATIONSOBSERVATIONS
Visual ConditionsVisual Conditions
Weather ConditionsWeather Conditions
Surface TemperatureSurface Temperature
Operations & MaintenanceOperations & Maintenance
VisualVisual
On-sight observation of entire test bed.On-sight observation of entire test bed.
Photographic documentation.Photographic documentation.
Real time video feed of taxiway (24/7).Real time video feed of taxiway (24/7).
Weather ConditionsWeather Conditions
Daily climatic data collected from NOAA.Daily climatic data collected from NOAA.
Climatic data utilized in the Enhanced Climatic data utilized in the Enhanced Climatic Model (ECM).Climatic Model (ECM).
Surface temperatures monitored with Surface temperatures monitored with existing sensors.existing sensors.
Operations and MaintenanceOperations and Maintenance
Use of observational video to determine all Use of observational video to determine all activities that occur on the pavement along activities that occur on the pavement along with quantity and duration of activities.with quantity and duration of activities.
Documentation of O & M’s daily log of Documentation of O & M’s daily log of activities for correlation with video activities for correlation with video observation.observation.
Equipment: De-icer and BrushesEquipment: De-icer and Brushes
INITIAL ACTIVITESINITIAL ACTIVITES
Camera system installed and fully Camera system installed and fully operational by end of Octoberoperational by end of October
Run friction tests to establish baseline for Run friction tests to establish baseline for anti-icing pavement and control.anti-icing pavement and control.
Take core samples from test siteTake core samples from test site
TIMELINETIMELINE
November 1, 2004November 1, 2004– Begin complete observations of test pavementBegin complete observations of test pavement
January 1, 2005January 1, 2005– Submit interim report on findingsSubmit interim report on findings
April 1, 2005April 1, 2005– Begin intense analysis of all accumulated dataBegin intense analysis of all accumulated data
August 2005August 2005– Submit Final ReportSubmit Final Report
Thank YouThank You
Any Questions?Any Questions?
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