1,720,984 research outputs found
Application of LCA methodology to the CLT panels made according to a short chain production process and definition of the benchmarks for environmental impact indicators
Get PDFThis paper describes the research activities related to the study of LCA methodology applied to the sector of construction and related to possible improvements and developments in this context. The research has provided a first step of analysis of the state of the art and a second one of verification of the methodology through the application to a case of study represented by the CLT panels produced by a company of Friuli Venezia Giulia. Subsequently, a critical analysis of the work was conducted and were proposed qualitative guidelines for the definition of benchmarks for the interpretation of the LCA results
Edifici di valore storico-architettonico. Strumenti operativi di supporto alla progettazione d'interventi di recupero.
No full textGli interventi di recupero, siano questi riferiti a edifici di valenza storico-architettonica sia a quelli di minor pregio, rappresentano di per sé una declinazione operativa propria del concetto di sostenibilità. L’attuale necessità di integrare i requisiti di efficienza energetica e salvaguardia ambientale con i principi operativi del recupero architettonico richiede una molteplicità di competenze e un’inevitabile interazione tra differenti ambiti disciplinari, che comportano conseguentemente diverse difficoltà operative. Ancor di più il problema operativo assume un livello di maggior complessità nel caso in cui ci si occupi di interventi di restauro su edifici di particolare valore storico-architettonico, laddove i limiti e la qualità degli interventi si misurano strettamente con i vincoli determinati dalla salvaguardia dei valori più sopra ricordati.
Per queste ragioni la possibilità di riferirsi a schemi consolidati che supportino ogni fase progettuale di un intervento di recupero / restauro è un aspetto importante sotto molti punti di vista. In tal senso sono stati sviluppati o sono in fase di laborazione diversi strumenti, tra i quali citiamo il Progetto A.T.T.E.S.S., il protocollo GBC Historic Building, il Progetto SECHURBA. Si propone infine una sintetica comparazione tra queste sperimentazioni, al fine di riconoscervi i diversi approcci al tema del recupero del patrimonio storico
Proposal for development of a system for the definition of benchmarks for LCA.
No full textThe possibility of defining benchmarks in order to give a sure interpretation of the results of LCA, consistent with international development, this is an issue that must be addressed in a broad and from a general point of view, at the same time, specific for the different identifiable sectors (agri-food, building, packaging, ...). Therefore, it is considered appropriate an international organized collaboration among research institutions, governments and industries that will bring together in a single “container” all the rules, the principles and the improvement prospects that will concur in determining the levels of environmental performances, that are going to represent a starting point to define benchmarks. In this way, we propose the idea of preparing an international LCA (web) portal, characterized by geographic area, that could filed under different parameters the results of the LCA applications, which come from different sources (industry, research projects, pilot projects). The classification is going to be done according to the following tree diagram: geographic area – sector – product – environmental indicator. By this scheme, it is possible to classify under quantitatively, from which it could be possible to define the average performances, above and below the average, that will respectively represent the value 0 (zero), the positive value (+) and negative (-) one. It could be also possible to define weights related to different indicators, depending on collected data. At this point, in according with an appropriate rating attribution system, we are going to combine weights and benchmark values in order to give a single indicator that could be interpreted in a “maximum-minimum” range of values. Therefore, it would be necessary to introduce a set of positive values (1, 2, 3, ...) to define increasing levels of environmental performances, considering type I ecological label (like Ecolabel) too. According with us, this can be a possible step to certificate products or services by Life Cycle Thinking criteria
The appraisal of reproduction costs of historic properties: The case of Venetian Villas; [La stima del costo di riproduzione delle dimore storiche: Il caso delle Ville Venete]
No full textThis paper illustrates a model for the quick estimate of the cost of reproduction of historic buildings, with particular regard to Venetian Villas. The goal is to provide an operational tool for the stipulation of an insurance contract, against partial or total damages, for products with an “accepted” value. This type of contract, although still not very widespread, allows, in the event of total destruction, to have the adequate
resources for the reconstruction of the building in its original conditions, as far as possible. The “accepted value” insurance of the building becomes an instrument for the protection of the collective historical-architectural heritage. The article, in addition
to illustrating the procedure in detail, presents a concrete application to historic homes in the Veneto region
Concept of an hydrothermal energy heat pump system for energetic requalification of historical buildings
Get PDFHistoric buildings are still excluded from the scope of regulatory framework concerning energy efficiency and environmental sustainability since European Directive 2002/91/EC and its following recast. Anyway, it is possible to provide renewable energy source systems in valuable historic buildings according to existing plants characters and possibly controlling complex safety mandatory framework requirements. A case study is presented in order to underline a development of sea hydrothermal energy use in high-value historic building heritage
An Integrated Procedure for Ex-Ante Evaluations of Refurbishment Costs in Healthcare Facilities
Get PDFThis paper focuses on the valuation of refurbishment costs for healthcare facilities. The
determination of the more reliable approach for experimental verification is a research topic of great
interest, especially because previous literature on the matter is limited. This study examines ex-ante
cost valuations in the refurbishment of healthcare buildings while using similarity to estimate the
costs that are based on the amount of already accomplished renovations. The methodology involved
a desk analysis deter-mining the technical valuation of intervention needs, and similarity coefficient
applications providing a refurbishment cost valuation. The application was conducted in the
Friuli—Venezia Giulia Region in Italy, where hospitals show structural, layout, and plants deficits
with respect to current regulations, and a technical deepening to identify critical issues is required
to prepare a multi-year intervention plan. The case study results showed that this procedure
requires little initial information to run analyses and its application can support investment budget
planning purposes
Enhancing the environmental performance of industrial settlements: An economic evaluation of extensive green roof competitiveness
Get PDFThis paper evaluates the private and social costs and benefits of adopting an extensive green roof as opposed to a
cool roof in an existing industrial building in Trieste (North-Eastern Italy). The evaluations from social and
private viewpoints both consider costs and benefits of refurbishments, energy consumption, and maintenance.
From the social side, the externalities derived from green or cool roofing, such as aesthetic aspects, biodiversity
preservation and natural habitat provision, carbon reduction, air quality improvement, and hydrological aspects,
are monetized using cost-benefit transfer approaches. The first analysis result is the poor convenience of
adopting a green roof compared to a cool one from the private investor's viewpoint. The second finding is the
positive net present value of the social cost-benefit analysis for the green roof compared with the cool roof, due
to the positive externalities of the former. Monetization of externalities allows calculating the economic incentives
needed to promote the spread of green roofing in the Mediterranean area. Consequently, two different
types of incentives are proposed: direct contribution for refurbishment intervention and annual reduction of
local property tax. A final sensitivity analysis using the Monte Carlo method is performed on intrinsic and
random variables, defined by triangular or uniform distributions. The probability evaluation of economic affordability
is provided from the private investor's viewpoint, first considering private costs and benefits and,
second, introducing the financial incentives for balancing the public benefits provided by an extensive green
roof
Recupero di murature storiche mediante consolidamento con fibre in polimero rinforzato
No full textLa valutazione dell’impatto delle opere di consolidamento da intraprendere sul patrimonio storico, condotta secondo i principi della sicurezza strutturale e del restauro, costituisce una fase necessaria per individuare metodologie di intervento compatibili con i valori storici ed architettonici di cui l’edificio è portatore.
L’edificio del Municipio di Monfalcone (GO), realizzato nel 1860 e caratterizzato da strutture in muratura provviste, in alcuni settori, di rivestimenti in pietra, è stato oggetto nella prima metà del secolo scorso di interventi di ampliamento, ristrutturazione e ridistribuzione degli spazi interni; a partire dal 2010, un complesso intervento di ristrutturazione radicale ambisce alla rifunzionalizzazione interna ed alla messa in sicurezza del fabbricato. In particolare le murature portanti, caratterizzate da una generale disomogeneità del tessuto, ricco di materiale incoerente e disaggregato, sono risultate soggette a rilevanti fessurazioni, evidenziate in fase di diagnosi, riferibili a cedimenti differenziali alle fondazioni e la cui entità si è aggravata nel corso dei lavori. Il monitoraggio del quadro fessurativo, nell’ottica della generale messa in sicurezza del fabbricato, ha messo in evidenza la necessità di una complessiva azione di miglioramento del comportamento strutturale che, nello specifico, ha previsto un radicale irrobustimento strutturale delle murature. La valutazione delle alternative possibili per il raggiungimento di tale risultato ha considerato l’utilizzo di reti di irrigidimento con betoncino a legante cementizio, l’applicazione iniezioni di boiacca di cemento nelle murature, e l’applicazione di una rete in resina polimerica per il placcaggio diffuso. Quest’ultima soluzione ottempera ai criteri prefissati di congrua collaborazione strutturale con le murature ottocentesche e di spessore contenuto degli elementi di rinforzo. Il consolidamento è stato dunque operato mediante tale metodica, che prevede l’applicazione di reti di fibre in polimero rinforzato (FRP, Fiber Reinforced Polymer), capaci di salvaguardare della composizione originaria della muratura, la reversibilità delle azioni di recupero e la compatibilità fisico-chimica dei nuovi componenti
Analisi tecnologica delle coperture verdi secondo un approccio prestazionale
No full textLa ricerca presenta lo studio e l’analisi degli aspetti tecnologici delle coperture verdi. Il lavoro si sviluppa partendo da un’analisi dei requisiti delle coperture verdi per arrivare ad una classificazione secondo gli elementi tecnici delle chiusure orizzontali superiori. La fase successiva implica l’identificazione dei requisiti e la determinazione degli strati funzionali che caratterizzano queste soluzioni tecnologiche, tramite l’analisi dei materiali e degli elementi tecnici. Una analisi delle prestazioni conduce attraverso il chiarimento delle diverse soluzioni conformi di tetti verdi
Sustainable structural retrofitting for historic buildings: a long-term decision analysis approach
Get PDFThe structural design of retrofitting solutions for historic buildings is a complex decision-making process and can be effectively integrated by various approaches able to take into consideration the entire life cycle of the project. The present study develops a decision tool for the design of refurbishment interventions for historic buildings, adopting a Life Cycle Thinking approach and integrating the long-term multi-attribute decision analysis. Starting from the multi-parameter analysis of a selected building, two timber- and one concrete-based structural interventions of floors strengthening are analyzed using an ELECTRE-based method, and considering a combination of economic, architectural, environmental, and structural effects related to present, medium-, and long-term performance aspects. The study demonstrates that the rehabilitation of existing buildings can be effectively supported and optimized to integrate technological performances with long-term effects of different solutions
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