Anti-icing Study at O’Hare International Airport Professor: Barry J. Dempsey Graduate Asst.: Nathan M. Carroll

BRIEF HISTORY  Winter of 2002, phase I testing began on textured aggregate coatings.  These Anti-icing Smart Pavement Overlays were evaluated for durability.  Preliminary observations demonstrate feasibility of installation process and durability.  Phase II began with installation of observation bed at O’Hare.

THE THEORY  The pavement overlay is placed on an existing pavement surface.  Anti-icing chemical is applied prior to icing conditions.  Icing conditions occur.  Anti-icing chemical are released from pavement.  Ice melts.

OUR GOAL  To perform a comprehensive observation of the test pavement under controlled conditions.  To perform complete analysis of all recovered data to determine the durability, performance and surface friction characteristics of the anti-icing pavement.

OBSERVATIONS  Visual Conditions  Weather Conditions  Surface Temperature  Operations & Maintenance

Visual  On-sight observation of entire test bed.  Photographic documentation.  Real time video feed of taxiway (24/7).

Weather Conditions  Daily climatic data collected from NOAA.  Climatic data utilized in the Enhanced Climatic Model (ECM).  Surface temperatures monitored with existing sensors.

Operations and Maintenance  Use of observational video to determine all activities that occur on the pavement along with quantity and duration of activities.  Documentation of O & M’s daily log of activities for correlation with video observation.

Equipment: De-icer and Brushes

INITIAL ACTIVITES  Camera system installed and fully operational by end of October  Run friction tests to establish baseline for anti-icing pavement and control.  Take core samples from test site

TIMELINE  November 1, 2004 –Begin complete observations of test pavement  January 1, 2005 –Submit interim report on findings  April 1, 2005 –Begin intense analysis of all accumulated data  August 2005 –Submit Final Report

Thank You Any Questions?