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Architectural Intelligence
Operating with an abundance mindset – rather than from a place of “scarcity” – is a new paradigm, relevant to the practices of design and construction, which expands the definition of “resources” as well as where resources, both raw and non-raw materials, can be found and “mined”.Within three scales of design and planning, the current research – developed at the Institute for Advanced Architecture of Catalonia (IAAC) – examines the applications of computational technologies and life cycle assessment with the goal of setting up protocols for enhancing processes of urban mining and material reuse in future circular construction. In the material scale (i), selected projects experiment with up-cycled waste for the creation of new engineered composites for construction. In the building scale (ii), robotic technologies and computer vision are used to scan and sort the materials from existing buildings or demolition sites. Finally, in the urban scale (iii), google images, satellite data an...
2021
The large volume of in-and out-flow of raw materials to construction projects has a huge potential to be optimised for resource efficiency and waste reduction. With the recent awareness of the importance of the circular economy, construction actors are aligning their practices to be more circular and sustainable. The concept of material banks is born out of this awareness in order to document the lifecycle information of materials and facilitate re-using them. The introduction of new cycles before individual materials reach their final lifecycle stages results in reduced negative environmental impacts. This paper presents a workflow by positioning different digital technologies to automate the procedures for reuse assessment: from the deconstructed building to M/C bank to new construction projects. This automation supports a practical material and component reuse, while it provides the necessary infrastructure to digitise and digitalise the post-deconstruction materials to be visualised, selected and used by future designers in Building Information Modelling (BIM)-based design and management environments. To this aim, the coupling of BIM, reality capturing technologies, additive manufacturing techniques, IoT and RFID sensors is also anticipated.
IOP conference series, 2019
The growing elimination of resources calls for a paradigm shift from linear material consumption to circular economy-especially in the construction industry. The residential and research unit Urban Mining and Recycling (UMAR) in the modular experimental building NEST of Swiss research institute Empa consequently implements this claim: The design by Werner Sobek with Dirk E. Hebel and Felix Heisel is constructed from separable, ingrade material resources that are completely reusable, recyclable or compostable. The concept of cycles therefore plays a central role: Utilized materials are not consumed and then disposed of; instead, they are borrowed from their technical or biological cycle for a certain period of time and later returned to these material cycles. Considering its many reclaimed material resources, the apartment is a built example of urban mining. Designed for disassembly at the end of its service time, UMAR also represents a material depot for future projects: Instead of connecting elements and components irreversibly through wet connections such as chemical glues, UMAR uses screws, clamps or interlocking systems in order to recover all used substances ingrade and sorted. UMAR is both temporary material depot and material laboratory-while proving the claim that it is possible already today to build within a circular system.
2020
If we strive for a de-carbonized future, we need to think of buildings within a city as resources that can be re-used rather than being disposed of. Together with considerations on refurbishment options and future building materials, this gives a decision field for stakeholders which depends on the current ``building stock'' the set of pre-existing buildings which are characterized e.g. by building period, location and material composition. Changes in that context are hard to argue for since (1.) some depend on statistics, other (2.) on the concrete neighborhood and thus the space in which buildings are embedded, yet again others on (3.) future extrapolations again dealing with both of the aforementioned environments. To date, there exists no tool that can handle this back-and-forth between different abstraction levels and horizons in time; nor is it possible to pursue such an endeavor without a proper framework. Which is why the authors of this paper are aiming to provide o...
IOP Conference Series: Earth and Environmental Science
The built environment is the cause of most of the material flows in the anthroposphere and the biggest material storage: Over 90 % of the anthropogenic stock stored in durable goods can be found in the built environment, with non-metallic minerals being the main contributor. In Germany, most of the materials that leave the stock due to demolition or renovation are recovered. In Saxony, a German state, the recovery rate is nearly 99 % but only 55% of mineral construction and demolition waste is recycled. There is still substantial potential for closing recycling loops. This requires the combined effort of all those actors that influence these material flows – from the investor and constructor of the single building to those responsible for waste management at municipal level and the waste disposal and construction materials industry. However, the information currently available is insufficient to support an effective urban mining. This will be encountered by an ongoing research proje...
Proceeding of the 38th eCAADe conference; Anthropologic - Architecture and Fabrication in the cognitive age, (Berlin, Germany, 2020 | virtual conference), 2020
If we strive for a decarbonized future, we need to think of buildings within a city as resources that can be re-used rather than being disposed of. Together with considerations on refurbishment options and future building materials, this gives a decision field for stakeholders which depends on the current``building stock''-the set of pre-existing buildings which are characterized e.g. by building period, location and material composition. Changes in that context are hard to argue for since (1.) some depend on statistics, other (2.) on the concrete neighborhood and thus the space in which buildings are embedded, yet again others on (3.) future extrapolations again dealing with both of the aforementioned environments. To date, there exists no tool that can handle this back-and-forth between different abstraction levels and horizons in time; nor is it possible to pursue such an endeavor without a proper framework. Which is why the authors of this paper are aiming to provide one, giving a model of change in the context of re-using material resource of the city, when faced with numerous abstraction levels (spatial or abstract; past, current or future) which have feedback loops between them. The paper focuses on a concrete case study in the city of Vienna, however, chances are high that this will apply to every other building stock throughout the world if enough data is available. As a matter of fact, this approach will ensure that argumentation can happen on multiple levels (spatial, statistical, past, now and future) but keeps its focus on making the building stock of a city a resource for sustainable development. Keywords: material reuse, sustainability, waste reduction, Design and computation of urban and local systems-XS to XL, Health and materials in architecture and cities D1.T2.S1. HEALTH AND MATERIALS IN ARCHITECTURE AND CITIES-Volume 1-eCAADe 38 | 127
eCAADe 2023: Digital Design Reconsidered, 2023
In recent years, there has been a growing interest in adopting circular approaches in the built environment, specifically reusing existing buildings or their components in new projects. To achieve this, drawings, laser scanning, photogrammetry and other techniques are used to capture data on buildings and their materials. Although previous studies have explored scan-to-BIM workflows, automation of 2D drawings to 3D models, and machine learning for identifying building components and materials, a significant gap remains in refining this data into the right level of information required for digital twins, to share information and for digital collaboration in designing for reuse. To address this gap, this paper proposes digital guidelines for reusing precast concrete based on the level of information need (LOIN) standard EN 17412-1:2020 and examines several CAD and BIM modelling strategies. These guidelines can be used to prepare digital templates that become digital twins of existing elements, develop information requirements for use cases, and facilitate data integration and sharing for a circular built environment.
2016
The recycling of different forms of architectural buildings within the settlement areas and buildings that appear to be waste (Berger, 2006; Koolhaas, 2006) are produced unintentionally (Clement, 2008; Bauman, 2005) by the transformations of the city (Lynch, 1992; Price, 2003). The presence of numerous abandoned or being abandoned buildings and urban equipment structures- architecture and engineering products- is not occasional, but a structural factor of the form of urbanism that characterizes the contemporary city. This research aims to take action on the effects of this dynamic, partly physiologically, for the internal migration of residences or other facilities and, for buildings and building materials, there is currently no programming life cycle, or recycling and design of these wastes (McDonough, Braungart, 2002). The aim of the research will be the recycling of these areas, and architectural objects, considering them as parts of new building structures, new architectures for...
IOP Conference Series: Earth and Environmental Science
The research work presented aims at setting up an infinite cycle of use of materials by their reuse and answering in particular to the problems of circular economy. Structural work and foundations represent the majority of the embodied energy of a building. The research effort is therefore focused on the structural elements. Reuse is here defined as the reuse of an element without transformation, unlike recycling which induces a new industrial cycle. It is therefore about reducing the consumption of materials and lowering GHG emissions. Today, it is impossible in France to reuse structures because of responsibilities, insurance and lack of traceability. How to make possible the reuse of structural components in order to reach a low carbon building? The challenge of this work is to find the best structural configuration making the components reuse easier at the EOL. The methodology we are implementing aims to design the structural elements by increasing the BIM parameters (6D, LCA), to attach the mechanical information, material durability, ageing to each object of the digital mock-up. A digital and physical traceability makes it possible to follow the evolution of the element over the years and to feed a database. At the end of its life the database is accessible and searchable for the design of a future building. A development of tools and gateways will then allow from a model of calculation to go to query the database to find an element resulting from the deconstruction that can be reused in the future structure.
2018
The research programme on the implementation of circular economy in the built environment, whose urgency is acknowledged both at national and at EU level, works on two complementary approaches: reuse ( superuse ) and recycling ( upcycling ). The first, theoretical and applied to a pilot case, is one of the first attempts to transpose to Italy the waste materials scouting and harvest mapping process as part of the design project. The second, with the start-up Atlante Inerti Project, which, with EIT funds, experiments an original use of recycled aggregates for the production of urban furniture elements with additive 3D printing and prefabrication of vibration compressed concrete, developing mixes with convincing performances of interest for further applications in the building industry.
Proceedings of The Institution of Civil Engineers-engineering Sustainability, 2004
2017 21st International Conference Information Visualisation (IV)
This paper presents a method and case study to visualize the urban stock of materials and its availability for use in building future cities. Re-using material from existing buildings for new buildings can be seen as a source for construction materials in times of depleting natural resources. The authors explain the concept of "urban mining" and the challenges, such as "How much resources are available in a city? Today? In the near future?" We explore what data are needed to answer the questions, and then discuss how to best visualize the data in an effective and intuitive way. We apply the concept to an exemplary real-world district in Singapore that is in transformation. Then, we discuss features of a visual tool prototype and explain the thinking behind the design, e.g., how the spatial and temporal dimensions can be presented. Lastly, we conclude the paper with an outlook of future challenges. The paper presents a multidisciplinary approach with researchers from computer science, architecture, graphic design and material science, and contributes to the discussion of how to visualize knowledge and plan sustainable future cities.
Journal of Engineering in Industrial Research, 2025
Circular economy, as a new approach to economic development, seeks to reduce pollution and manage resources more efficiently. The purpose of this article is estimate of Circular Economy Principles in Architectural Design, Construction and Real Estate. Circular economy is an economic system in which products, materials and resources are continuously recycled, resulting in no or minimal waste. It is based on three fundamental principles: design to eliminate waste and pollution; keep materials and products in the cycle of use; and restore natural systems. The world population is expected to reach 9 billion by 2050, with 55% of them living in cities. This population growth will put more pressure on natural resources and demand new infrastructure, services and housing. Currently, cities account for approximately two-thirds of global energy demand and are responsible for 80% of greenhouse gas emissions as well as 50% of global waste, with estimates indicating that urban waste levels will double by 2050. The construction industry’s approach to the life cycle of materials and buildings is evolving. For a long time, this cycle has followed the simple formula of “plan, design, build and finally demolish”, but over time, new concepts such as recycling, dismantling, reuse and circular demolition have emerged in the industry and form part of the gradual transformation towards a circular economy in construction. This approach not only extends the lifecycle of building components, but also fosters a symbiotic relationship between the built environment and the natural world. Circular design emphasizes several key principles: designing for longevity, adaptability, and disassembling components; using sustainable materials; and ensuring that products can be easily repaired, reused, or recycled at the end of their life cycle. The transformation in the construction industry’s approach is bringing the stages of use of buildings and their life cycle closer to reality.
IOP Conference Series: Earth and Environmental Science
Buildings and construction have been identified as having one of the greatest potential for value creation and capture from the application of circular economy principles. To achieve this requires a fundamental transformation in the recovery, remanufacture and re-use of end of service life structural products such as steel, bricks, concrete which make up the largest proportion of materials. At the same time these products must be re-used in new buildings and infrastructure designed for subsequent deconstruction and disassembly. REBUILD is a 3 year way UK research project to address this challenge. Initial findings on quantifying the material intensity of buildings (stock and flow assessment) are presented based on one of our case study cities. Results from new techniques to separate and reclaim bricks from cement mortar shows technical feasibility and ability to retain structural performance. Details on the next stage of scaling this work and techniques for separating and reclaiming steel and concrete are briefly described. Subsequent stage of life cycle assessment, value stream mapping and creating products for new forms of circular building and construction systems are also described. The paper concludes that whilst there are considerable challenges in reclaiming structural products that redesigned circular building and construction system could transform the value of end of service life buildings and the offers new opportunities for circular innovation and the circulation of materials and products at their highest value for the longest period.
2009
At a time when planning research is under pressure to better respond to sustainable development, revision on the urban planning models and available planning tools and methodologies has been claimed. This paper reveals a methodological approach towards planning that takes in account the analysis of the urban material dynamics as the principal indicator for the guarantee of the sustainability condition. It does this by exposing the existing relationship between the urban material dynamics and sustainability as the elementary tool to access the sustainability problem, and to approach the city planning itself. In order to do so, it reveals the results of an ongoing investigation, supported on the urban material flow analysis, of a case study area of 33 ha -Brañas de Sar, situated at Santiago de Compostela, Spain. This research aimed to identify in the spatial organization of Brañas and within its relation to the material dynamics of Santiago, the elements that allowed its functionality, in the traditional city, and their current ruined condition. The different elements that one should take in account to intervene with a planning proposal includes the physical aspects, the resources management over the territory, and the strategic approach account, towards the implementation of a sustainable urban model for the city of Santiago. The results of the case study revealed for Brañas the opportunity that future interventions in such site could contribute to transform it in a sustainable manner, and that such transformation would have implications at the city scale itself.
Procedia CIRP, 2018
Following the Waste Framework Directive, new solutions must be identified for the management of Construction and Demolition waste. Circular economy would provide the strategic key for addressing this issue: construction industry may, in fact, become an elective consumer of its own waste, where construction materials are circular and eco-designed. A comprehensive case study has been built, starting from evaluation of different management options for this waste to be applied in the municipality of Bologna and prosecuting with the design of concrete mixes, implementing construction and demolition derived aggregates as partial replacement for natural aggregates. Life Cycle Assessment (LCA) has been applied to evaluate the environmental impact of the options designed, in comparison with standard concrete already on the market. In particular, 25% replacement of natural aggregates leads to almost equal decrease in respiratory inorganics related impact and more than 39% decrease in land occupation indicator, even though ozone layer depletion impact indicator shows a negative performance. Nevertheless, partial aggregates replacement should be coupled by a limited cement replacement, in order to trigger a substantial decrease of the environmental impact in concrete production.
Applied Sciences
The Architecture, Engineering, and Construction (AEC) industries are the producers of the most significant waste stream in the European Union. Known EU initiatives propose to deal with the issue of construction and demolition waste (CDW) according to the principles of a circular economy: the 3Rs (reduce, reuse, and recycle). CDW is generated during the whole life cycle of construction. The lack of information about the quantity of CDW during the design phase of building needed for sustainable design of construction was identified as a research gap. The aim of our research is to quantify construction and demolition waste during the construction design phase in a circular economy. The proposed method is based on the generation rate calculation method. This paper describes the proposed methodology for quantifying selected types of construction waste: excavated soil, concrete, and masonry. This information is essential from the point of view of a sustainable circular economy. The main c...
2017
In recent years there has been growing interest in urban mining from various environmental and economic perspectives. Materials hidden in buildings are attractive alternatives to raw ones, while building activities are responsible for a large share of waste. The paper is a summary of findings from an analysis of possibilities for urban mining in Amsterdam, focusing on prospecting for metals in residential buildings. Both global literature and interviews with Dutch demolition experts suggest that performance in metal recovery from buildings is as high as it can get. However, estimation of metal content in buildings and of waste processing rates is far from reliable, accurate and precise enough to support such claims or identify possibilities for further improvement, especially in relation to processes of urban and real-estate redevelopment and rejuvenation. To improve understanding and embedding of urban mining in these processes, we propose (a) a BIM-based information infrastructure...
The Routledge Handbook of Catalysts for a Sustainable Circular Economy, 2023
Construction is one of the most significant sectors consuming virgin materials and producing waste and greenhouse gases. The circular economy has been proposed as a solution to the industry's environmental problems. However, the transition has proved difficult and biased towards recycling rather than waste prevention and reuse. It is not known how the industry could adopt reuse-based solutions, even if reuse could reduce the environmental burdens more so than recycling. This chapter provides insights into how the construction sector could become more circular and low-carbon by reusing building components. It stems from developing the ReCreate project (Horizon 2020), which investigates the deconstruction and reuse of prefabricated concrete elements not originally designed for disassembly. The analytical approach used here is Frank Geels's multi-level perspective for technology transitions. This chapter is a theoretical contribution that identifies and explains a wide spectrum of diverse catalysts necessary for the reuse transition, ranging from technological development (in deconstruction, remanufacturing, design, and digitalisation) to societal and economic developments (in behaviour and acceptance, work skills, safety, regulation, business models, and value chains). It also discusses catalysts' roles and timeframes in the nexus of a sociotechnical regime (business-as-usual construction) and niche innovation (reuse), which is attempting a breakthrough. A conceptual framework is provided for facilitating a reuse transition in the construction sector.
The growing concern about climate change and the recognition of the planet’s limits led society to look for alternatives that promote the balance between the natural and the built environment. The circular economy emerges as an alternative to the linear economic model, inspired by natural metabolisms, by circulating resources in continuous loops, where their intrinsic value is maintained and improved. This research proposes a closed-loop strategy in the built environment by studying innovative constructive solutions that aim to find use, value, and inspiration in what is considered waste. A literature review is conducted on the circular design strategies, re-use and recycle typologies, and waste transformation processes. Then, the development of a methodology for qualitative evaluation and selection of re-used and upcycled construction materials from post-consumer waste and by-products is presented and then applied to thirty-five cases of constructive solutions from plastic, wood, p...
2020
The municipal sector and different industries, including construction and demolition activities in urban areas, generate waste streams that could provide excellent secondary raw materials (SRM) to replace traditional raw materials in construction applications. The CINDERELA project develops a business model (CinderCEBM) aided by a one-stop-shop (CinderOSS) service to help construction companies increase profit and deliver value by using SRM from urban waste streams in building and civil engineering applications. The model and the platform will be tested in different socio-economic environments to ensure technological, systemic and economic viability across Europe through demonstrations involving manufacturing and construction with the use of SRM-based materials supported by building information modelling (BIM) and advanced solutions combining disruptive technologies (3D printing) and SRM cascading recycling systems (phosphorus extraction from wastewater prior to sewage sludge use in...
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