This paper provides initial results from experimental work on laboratory accelerated ageing of external thermal insulation composite systems with rendering (ETICS) undertaken at the Building Environment Science and Technology department of the Polytechnic of Milan. The work forms part of a broader experimental programme seeking to develop knowledge on the relationship between critical properties affecting long-term performance and test parameters that reveal the process of degradation. The performance evaluation of ETICS specimens consisted of several different types of tests conducted on non-aged specimens and specimens subjected to accelerated environmental ageing. The ageing procedure consisted of exposing specimens to different environmental macro-cycles comprised of ageing under ultraviolet radiation and warm and cold temperature cycling that replicated temperature cycling occurring in winter or summer in Italy. Non-destructive tests were carried out that included obtaining photos to characterise the evolution of surface degradation of specimens and conducting absorption tests to determine the degree of moisture uptake in the specimens. Other tests were used for assessing hygrothermal performances including dynamic thermal response, thermal inertia, thermal resistance and dynamic response to variations in moisture content of base and finish coat. In this paper the tests methods are described and initial results analysed following two ageing macro-cycles used to discern the process of degradation of the specimen, in terms of monitoring changes in capillary water absorption, thermal resistance and rendering degradation (photo survey). The long-term aim of this study is to develop a method to evaluate the Serviceability Limit State of building components based on understanding relationships between performance attributes and physical properties of building components.

Evolution of degradation and decay in performance of ETICS

DANIOTTI, BRUNO;PAOLINI, RICCARDO
2008-01-01

Abstract

This paper provides initial results from experimental work on laboratory accelerated ageing of external thermal insulation composite systems with rendering (ETICS) undertaken at the Building Environment Science and Technology department of the Polytechnic of Milan. The work forms part of a broader experimental programme seeking to develop knowledge on the relationship between critical properties affecting long-term performance and test parameters that reveal the process of degradation. The performance evaluation of ETICS specimens consisted of several different types of tests conducted on non-aged specimens and specimens subjected to accelerated environmental ageing. The ageing procedure consisted of exposing specimens to different environmental macro-cycles comprised of ageing under ultraviolet radiation and warm and cold temperature cycling that replicated temperature cycling occurring in winter or summer in Italy. Non-destructive tests were carried out that included obtaining photos to characterise the evolution of surface degradation of specimens and conducting absorption tests to determine the degree of moisture uptake in the specimens. Other tests were used for assessing hygrothermal performances including dynamic thermal response, thermal inertia, thermal resistance and dynamic response to variations in moisture content of base and finish coat. In this paper the tests methods are described and initial results analysed following two ageing macro-cycles used to discern the process of degradation of the specimen, in terms of monitoring changes in capillary water absorption, thermal resistance and rendering degradation (photo survey). The long-term aim of this study is to develop a method to evaluate the Serviceability Limit State of building components based on understanding relationships between performance attributes and physical properties of building components.
2008
atti della conferenza internazionale CIB 11DBMC on Durability of Building Materials and Components ISTANBUL - TURKEY
9789755613291
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/541640
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