Service Life Prediction of Natural Stone Claddings with an Indirect Fastening System

Mousavi, S. H.; Silva, Ana; Brito, Jorge de; Ekhlassi, Ahmad; Hosseini, Seyed Bagher

doi:10.1061/(asce)cf.1943-5509.0001007

Cited by 13 publications

(9 citation statements)

References 34 publications

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“…Final premium by household = 43.28 − 0.9 * (43.28 − 26.77) = 28.42 (13) The commercial premium for the policyholders of the case study varies between 25€ and 35€ per year. Considering the average apartment's real estate value, the yearly premium corresponds to less than 0.1% of the cost of an apartment.…”

Section: Resultsmentioning

confidence: 99%

“…Table 6. Fixed costs of the maintenance actions (data sourced from CYPE [19] and Mousavi et al [13]). The insurance policy proposed presents some limitations regarding the claims:…”

Section: Models' Assumptions Concerning the Coverage Of The Insurancementioning

confidence: 99%

“…Degradation levels for natural stone claddings (data sourced from Silva et al[12]; Mousavi et al[13]). …”

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confidence: 99%

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Design of an Insurance Policy Model Applied to Natural Stone Facade Claddings

et al. 2019

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The insurance market deliberately excludes the buildings’ envelope from their insurance policies, neglecting all the damage that can be caused by the degradation process or ageing of the materials. This stance is mainly due to the lack of knowledge in terms of risk and costs associated to the failure of these elements. Even though the building and its elements are the most valuable asset of any owner, most often homeowners do not adopt effective preventive measures to mitigate the deterioration and obsolescence of their assets. This study proposes an innovative methodology for the design of insurance policies for buildings’ envelopes, applied to natural stone facade claddings. The insurance product is defined based on deterministic and stochastic service life prediction models, established through the past degradation history of 142 natural stone claddings analyzed in service conditions in Portugal. Single-parameter (only analyzing the cladding’s age) and multiparameter (encompassing the relevant variables) models are applied in the calculation of the insurance premium. The expected claims are related with the performance of maintenance actions and established according to three degradation levels. The results obtained reveal that an increased knowledge about the insured cladding leads to a reduction of the risk margin and consequently, to a lower annual value of commercial premium paid by a household. This study proposes an innovative solution for tailoring the insurance products, in terms of the risk of failure of the buildings components, as well as the financial charges related with the maintenance of these elements, channeling the risks to the market.

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Section: Resultsmentioning

confidence: 99%

“…Table 6. Fixed costs of the maintenance actions (data sourced from CYPE [19] and Mousavi et al [13]). The insurance policy proposed presents some limitations regarding the claims:…”

Section: Models' Assumptions Concerning the Coverage Of The Insurancementioning

confidence: 99%

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Design of an Insurance Policy Model Applied to Natural Stone Facade Claddings

et al. 2019

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“…Este método foi desenvolvido inicialmente para revestimentos de argamassa, mas bons resultados foram obtidos para outros sistemas de revestimento: cerâmico (Silva, 2014;Sousa, 2008;Souza, 2016), pétreo (Mousavi et al, 2017;Silva, 2009), pintura (Chai, 2011;Santos, 2018), concreto aparente (Serralheiro et al, 2017) e ETICS (Ximenes et al, 2015). Neste estudo de caso, esta metodologia foi aplicada a fachadas com revestimento de argamassa com acabamento em pintura, sendo a severidade da degradação (Sw) obtida através da Equação (1):…”

Section: Metodologiaunclassified

Aplicação de curvas de degradação na previsão de vida útil de revestimentos de argamassa externa com acabamento em pintura na cidade de Recife, Brasil

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O presente estudo teve como objetivo desenvolver um modelo para prever a vida útil de revestimentos de paredes externas em argamassa com acabamento em pintura, com base no estado de degradação de 28 edificações na cidade de Recife, Brasil. A área de revestimento afetada por diferentes manifestações patológicas foi medida e um índice numérico para descrever a gravidade da degradação do revestimento (Sw) foi calculado. A partir deste índice, foram construídas curvas de degradação em função de fatores intrínsecos (orientação cardeal, textura, cor e presença de detalhes construtivos) e extrínsecos (distância do mar e proximidade de fontes poluentes). Nas amostras analisadas houve o predomínio de manchas, e em menor número, fissuras e descolamentos. Dos fatores estudados, a orientação cardeal das fachadas foi o que apresentou maior influência no processo de degradação. Os resultados obtidos demonstram claramente a aplicabilidade do modelo no estudo da degradação de revestimentos, contribuindo para o desenvolvimento de ações de manutenção focadas nos fatores mais importantes na degradação de revestimentos.

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“…Among them are: (i) statistical analysis [29]; (ii) simple regression analysis [30]; (iii) multiple liner regression analysis [31]; (iv) factor method [32]; (v) Markov chains [33]; and (vi) fuzzy models [34]. The information gathered from these studies proved to be fundamental to define maintenance planning, optimize the use of resources, and minimize the overall costs of the building over its service life [35]. Non-deterministic models are especially advantageous since they can capture the uncertainty associated with the subjectivity of the data collection and the natural variability of the degradation process [19][20][21]27,28].…”

Section: Introductionmentioning

confidence: 99%

Condition-Based Maintenance Strategies to Enhance the Durability of ETICS

et al. 2021

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The increase of awareness with sustainability and the desire of reducing the energy consumption in the construction sector haved increased the application of External Thermal Insulation Composite Systems (ETICS) across Europe in the last decades. Nevertheless, the implementation of appropriate maintenance strategies is still neglected. The aim of this study is to analyse the impact of different maintenance strategies. For that purpose, a condition-based maintenance model, based on Petri nets, is used to evaluate three maintenance strategies: MS1—total replacement only; MS2—combination of minor intervention and total replacement; and MS3—combination of cleaning operations, minor intervention, and total replacement. In the end, a multi-criteria analysis is used to discuss the impact of the three maintenance strategies proposed, evaluating the remaining service life, the global costs over time, the ETICS’ degradation condition, and the number of replacements (end of service life) over the time horizon. For this purpose, a sample of 378 ETICS was analysed, based on in situ visual inspections, carried out in Portugal. The results from this study reveal that maintenance plays an important role to increase the durability of ETICS, and therefore their sustainability. Regular maintenance can promote the extension of the ETICS’s service life between 88% and 159% (between 15 to 27 years), improve the global degradation condition of the ETICS, and reduce the impact on users by reducing the number of deeper interventions. Further research is essential to optimise the maintenance strategies (time interval between inspections, stakeholders’ performance criteria, and environmental exposure).

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Service Life Prediction of Natural Stone Claddings with an Indirect Fastening System

Cited by 13 publications

References 34 publications

Design of an Insurance Policy Model Applied to Natural Stone Facade Claddings

Design of an Insurance Policy Model Applied to Natural Stone Facade Claddings

Aplicação de curvas de degradação na previsão de vida útil de revestimentos de argamassa externa com acabamento em pintura na cidade de Recife, Brasil

Condition-Based Maintenance Strategies to Enhance the Durability of ETICS

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