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THE PREDICTION OF LONG TERM SEALANT PERFORMANCE FROM DYNAMIC ACCELERATED WEATHERING

Objective

-To develop and utilise realistic accelerated weathering regimes.
-To design and manufacture devices for subjecting joint sealants to cyclic movement while undergoing accelerated or natural weathering.
- To develop sensitive techniques for analyzing degraded sealants.
-To develop a model to predict the life expectancies of sealants in three chosen climatic zones to within expected limits of +/- 3 years.
- To provide end users and designers with information on performance and life expectancy of sealants on which to base their product selection.
The main project objective was to establish accelerated weathering programs and test procedures to enable reliable predictions of sealant performance and suitability for a given climate. Although a definitive new methodology has not been fully achieved, in part due to the time scale of the project, a substantial step forward has been accomplished in the accelerated weathering of sealant materials. The project has highlighted the important effects of cyclic stressing, moisture, and temperature in the reliable prediction of long-term performance.

Coordinator

Taywood Engineering Ltd
Address
Taywood House 345 Ruislip Road
UB1 2QX Southall
United Kingdom

Participants (5)

British Rail Research
United Kingdom
Address
London Road
DE2 8YB Derby
CENTRE SCIENTIFIQUE ET TECHNIQUE DU BATIMENT - CSTB
France
Address
4, Avenue Du Recteur Poincare
75782 Paris
Centre National d'Evaluation de Photoprotection
France
Address
Ensemble Scientifique Des Cezeaux
63177 Aubière
Enichem Synthesis SpA
Italy
Address
Via Felice Maritano 26
20097 San Donato Milanese
Rhône-Poulenc Chimie SA
France
Address
52 Rue De La Haie-coq
93308 Aubervilliers