Application of the factor method to the service life prediction of window frames

2020 ◽  
Vol 109 ◽  
pp. 104245 ◽  
Author(s):  
Margarida Maia ◽  
Rodrigo Morais ◽  
Ana Silva
Keyword(s):  
Service Life ◽  
Life Prediction ◽  
Service Life Prediction ◽  
Factor Method ◽  
Window Frames

scholarly journals Application of the factor method to the service life prediction of architectural concrete

2019 ◽  
Vol 46 (11) ◽  
pp. 1054-1062 ◽  
Author(s):  
A. Jardim ◽  
A. Silva ◽  
J. de Brito
Keyword(s):  
Service Life ◽  
Life Prediction ◽  
Graphical Method ◽  
Service Life Prediction ◽  
Empirical Knowledge ◽  
Factor Method ◽  
Deterioration Process ◽  
Service Conditions

Architectural concrete surfaces are a durable solution, but their deterioration process is unavoidable and begins as soon as the element is built. This study establishes a methodology for predicting the service life of architectural concrete surfaces, through the application of the factor method. For this purpose, 239 architectural concrete surfaces in in-service conditions are analysed. Different durability factors are studied and their impact in the service life of architectural concrete surfaces is evaluated. Different scenarios are analysed for the quantification of the durability factors. Scenario 4 presents the best results, leading to a higher similarity between the estimated service lives predicted by the factor method and obtained by the graphical method. The application of the factor method, as described in this study, allows one to predict the service life of architectural concrete surfaces. An estimated service life ranging between 43 and 48 years was obtained, which agrees with the literature and empirical knowledge.

scholarly journals Methodology for service life prediction of window frames

2019 ◽  
Vol 46 (11) ◽  
pp. 1010-1020 ◽  
Author(s):  
D. Fernandes ◽  
J. de Brito ◽  
A. Silva
Keyword(s):  
Service Life ◽  
Case Studies ◽  
Thermal Performance ◽  
Life Prediction ◽  
Visual Inspection ◽  
Service Life Prediction ◽  
Substantial Impact ◽  
Over Time ◽  
Window Frames ◽  
Exposure Conditions

Window frames are an important element of buildings, with an enormous impact on the thermal performance and interior comfort conditions of buildings. Knowledge regarding the service life of window frames is extremely relevant, aiding the adoption of adequate solutions in the design and maintenance stages. This study proposes a methodology for the service life prediction of window frames, based on the visual inspection of 182 case studies, in-use conditions, in which the degradation phenomena and various characteristics of window frames are surveyed. This information is converted into degradation curves, which express the evolution of the degradation of window frames over time, allowing their service life to be estimated, as well as the influence of their characteristics on their durability. For aluminum and wooden frameworks, estimated service lives of 37.6 and 27.3 years are obtained. These results reveal that the window exposure conditions and the users’ behaviors have a substantial impact on the degradation of window frames.

scholarly journals APPLICATION OF THE FACTOR METHOD TO THE SERVICE LIFE PREDICTION OF ETICS

2018 ◽  
Vol 22 (3) ◽  
pp. 204-222 ◽  
Author(s):  
Cristina MARQUES ◽  
Jorge de BRITO ◽  
Ana SILVA
Keyword(s):  
Service Life ◽  
Life Prediction ◽  
Composite System ◽  
Service Life Prediction ◽  
Management Systems ◽  
Degradation Mechanisms ◽  
Factor Method ◽  
Use Of Resources ◽  
Building Management ◽  
Selection Of

This study intends to develop a methodology for service life prediction of ETICS (External Thermal Insulation Composite System), based on the factor method. The methodology adopted is based on data collected during visual inspections of buildings under current conditions of occupation and exposure, contemplating the degradation mechanisms and the characteristics of ETICS. This research can also provide a suitable tool to aid the planning, implementation and rational use of building management systems in several ways, namely: i) improvement of the materials’ performance, based on the optimization of maintenance actions, use of resources and maintenance costs; ii) selection of the best constructive solution, based on the knowledge of the evolution of degradation of ETICS, according to their characteristics; iii) analysis of the economic and environmental impacts of buildings during their life cycle, based on the knowledge of the number of replacements required during this period of time.

scholarly journals Critical Review of Polymeric Building Envelope Materials: Degradation, Durability and Service Life Prediction

Buildings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 299
Author(s):  
Marzieh Riahinezhad ◽  
Madeleine Hallman ◽  
J-F. Masson
Keyword(s):  
Climate Change ◽  
Service Life ◽  
Critical Review ◽  
Life Prediction ◽  
Building Envelope ◽  
Service Life Prediction ◽  
Degradation Mechanisms ◽  
Material Component ◽  
Aging Conditions ◽  
Environmentally Sound

This paper provides a critical review of the degradation, durability and service life prediction (SLP) of polymeric building envelope materials (BEMs), namely, claddings, air/vapour barriers, insulations, sealants, gaskets and fenestration. The rate of material deterioration and properties determine the usefulness of a product; therefore, knowledge of the significant degradation mechanisms in play for BEMs is key to the design of proper SLP methods. SLP seeks to estimate the life expectancy of a material/component exposed to in-service conditions. This topic is especially important with respect to the potential impacts of climate change. The surrounding environment of a building dictates the degradation mechanisms in play, and as climate change progresses, material aging conditions become more unpredictable. This can result in unexpected changes and/or damages to BEMs, and shorter than expected SL. The development of more comprehensive SLP methods is economically and environmentally sound, and it will provide more confidence, comfort and safety to all building users. The goal of this paper is to review the existing literature in order to identify the knowledge gaps and provide suggestions to address these gaps in light of the rapidly evolving climate.

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