A MECHANISTIC APPROACH TO DESIGN AND UNDERSTANDING OF HEAT RESISTANCE IN AIRFIELD PAVEMENTS

Award Information
Agency:
Department of Defense
Branch:
Navy
Amount:
$124,115.00
Award Year:
1991
Program:
SBIR
Phase:
Phase II
Contract:
N/A
Agency Tracking Number:
12314
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Cemcom Research Associates Inc
10123 Senate Dr, Lanham, MD, 20706
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
N/A
Principal Investigator
 Dr Sean Wise
 (301) 731-4210
Business Contact
Phone: () -
Research Institution
N/A
Abstract
THE MECHANISM OF CONVECTIVE HEATING INDUCED SPALL FORMATION IN AIRFIELD PAVEMENTS WILL BE STUDIED. THE OBJECTIVE WILL BE TO DETERMINE THE IMPORTANT PARAMETERS RELATED TO DESIGNING HEAT RESISTANT PAVEMENTS WHILE MAINTAINING OR IMPROVING RESISTANCE TO FUEL, HYDRAULIC FLUID AND DE-ICING CHEMICALS. THE PROJECT WILL BEGIN WITH A LITERATURE REVIEW TO PREPARE A DATABASE OF HEAT RESISTANT CONCRETES AND PAVEMENT DESIGNS CURRENTLY IN USE AND TO CLASSIFY THEIR PERFORMANCE RELATIVE TO COMPOSITION. A SIMPLE CONVECTIVE HEAT TRANSFER MODEL WILL BE USED TO EXAMINE THERMAL GRADIENTS IN CONCRETES GENERATED BY TURBINE EXHAUST HEATING. THESE THERMAL GRADIENTS WILL BE USED IN A FINITE ELEMENT MODEL TO LOOK AT SIMPLE HEAT INDUCED STRESSES. ADDITIONALLY, THE EFFECT OF PORTLAND CEMENT DEHYDRATION WILL BE EXAMINED TO SEE HOW THIS AFFECTS THE BINDER AND THE BINDER AGGREGATE BOND. THE MODELING WILL BE BACKED UP BY EXPERIMENTAL TESTS TO LOOK INTO THERMAL PROFILES OF CONVECTIVELY HEATED PAVEMENTS. TESTS WILL BE CONDUCTED TO DELINEATE THE RELATIVE SIGNIFICANCE OF SIMPLE THERMAL STRESS VERSUS SHRINKAGE AND DECOMPOSITION OF THE CEMETITIOUS BINDER. THE DATABASE AND MECHANISTIC TESTING WILL BE COMPARED TO DETERMINE IF FIELD PERFORMANCE IS CONSISTANT WITH THE MECHANISTIC TESTING. FROM THIS, PAVEMENT DESIGNS WILL BE IDENTIFIED THAT MEET OR EXCEED THE THERMAL AND ENVIRONMENTAL STABILITY REQUIREMENTS.

* information listed above is at the time of submission.

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