brief history

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?