Meliha Honic-Eser
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- Applying EU Level(s) framework indicators to improve circularity: A case studyItem type: Conference Paper
IOP Conference Series: Earth and Environmental ScienceHonic-Eser, Meliha; De Wolf, Catherine (2023)The construction industry is the main consumer of raw materials and simultaneously responsible for 36% of solid waste in the EU, wherefore the implementation of a circular economy in the industry is urgently needed. The European Commission developed the Level(s) framework to help measure the environmental impact and improve the circularity of buildings. Yet applying the framework's indicators with the provided templates is a challenging task due to the comprehensive nature and size of EU documents and the lack of clarity on how to use the templates. This paper applies Indicators 2.1 (Bill of quantities, materials, and lifespans) and 2.2 (Construction and demolition waste and materials) to a case study to provide a better understanding of using them in practice. The findings will help actors throughout the whole value chain to implement required information into their building models for assessing and improving circularity in their buildings. - Augmenting materials passports to support disassembly planning based on building information modelling standardsItem type: Journal Article
Journal of Building EngineeringSanchez, Benjamin; Honic-Eser, Meliha; Leite, Fernanda; et al. (2024)Selective disassembly planning and materials passports are precursor technologies to support the retrieval of reusable building components efficiently. Selective disassembly relies on information about the recovery capacity of the components, while materials passports can be used to keep track of the disassembly information along the component's life cycles. However, the required information for selective disassembly is not represented in materials passports. Therefore, we developed a research approach to augment materials passports by integrating the information related to the components recovery capacity using a BIM-based Semantic Enrichment Engine for Disassembly Planning (SEEDP). First, we investigated the required information for selective disassembly and we proposed a characterization schema for disassembly models. Then, we developed the semantic enriching engine, SEEDP, as a comprehensive solution to automate three crucial steps: data pre-processing, production of materials passports for components, and assessment of disassembly models. Finally, we implemented the approach for two case studies as a functional demonstration. - Decentralized Data Networks for Lifecycle Management in the Built EnvironmentItem type: Journal Article
Journal of Information Technology in ConstructionBucher, David; Hunhevicz, Jens Juri; Byers, Brandon; et al. (2025)The management of lifecycle data poses significant challenges for the built environment, hindering effective transformation toward important concepts such as a circular economy. Many recent scholars propose blockchain technologies as a solution; however, there is almost no investigation into decentralized data networks, which also offer significant potential for lifecycle data management. This might be due to a lack of clarity in understanding the fundamental characteristics and potential use cases for decentralized data networks. Therefore, this paper combines a comprehensive review with inductive reasoning to classify three functional typologies—immutable, comprehensive, and privacy-centric – of decentralized data networks. Through testing with material passport data, we evaluate the practical implications of these typologies for lifecycle data management in the built environment. The findings highlight that decentralized data networks can improve data sovereignty and interoperability, but their effectiveness depends on use-case-specific trade-offs, such as mutability, access control, and storage location control. To navigate these trade-offs, the paper derives a decision framework that guides practitioners and researchers in selecting the most suitable decentralized data network. These insights contribute to a better understanding of decentralized technologies beyond blockchain and provide actionable recommendations for the future of data management in the built environment. - Framework for the assessment of the existing building stock through BIM and GISItem type: Journal Article
Developments in the Built EnvironmentHonic-Eser, Meliha; Ferschin, Peter; Breitfuss, Dominik; et al. (2023)With 60% of the world's raw materials extraction, the construction sector is the largest consumer of raw materials. The consumption can be reduced through reuse and recycling of building materials which reached their end-of-life; however, there is lack of information on the building stock. This paper presents a bottom-up approach based on Building Information Modeling (BIM) and Geographic Information System (GIS) to assess material quantities. To test this approach, a real-world building is used. The material intensity is calculated based on existing planning documentations, on-site investigations, laser scanning and a BIM-model. The gross volumes (GVs) obtained from GIS enable the modelling and prediction of cities' building stocks. The results of this paper demonstrate the method of calculating material intensities and present how the applied method can be used to predict building stocks. The latter is presented as a framework which can support various cities in assessing their material stock. - Exploring Tokenized Product Passport for Circular Construction Supply ChainsItem type: Conference Paper
Computing in Construction ~ Proceedings of the 2024 European Conference on Computing in ConstructionByers, Brandon; Hunhevicz, Jens Juri; Honic-Eser, Meliha; et al. (2024)A token is a cryptoeconomic entity on a blockchain that can be used to digitally secure, represent, and trade assets. Existing research does not sufficiently explore the use of tokenization as digital representations of physical construction assets within the context of circular supply chains. Thus, this research explores why tokenization for circular construction may be helpful by employing a mixed methods approach via quantitative and qualitative analysis of expert surveys and a technical review of tokens. The contribution proposes scenarios of tokenization's potential for blockchain-based product tracking and product passports for AEC. - A steel element reuse ontology for building audits in circular constructionItem type: Journal Article
Developments in the Built EnvironmentSchönfelder, Leonhard; Byers, Brandon; Honic-Eser, Meliha; et al. (2025)The construction sector's transition to a circular economy necessitates the closure of material loops through reuse. However, there is little consensus regarding the information to assess the reusability of building elements. This paper determines the necessary information for evaluating steel member reusability and explores the structure of an ontology for conducting building audits. The methodology involves surveys and interviews with European experts in reuse to create the Steel Element Reuse Ontology (SERO). The results show 1) that economic, technical, and condition factors are important to define reusability, and 2) an ontology to assess the reusability should account for the condition and documentation of steel members. SERO establishes definitions and a human- and machine-readable framework for assessing the reuse potential of steel H- and I-profiles in a European context. This framework could be employed in developing digital tools aimed at streamlining inventory procedures in construction, fostering the practical implementation of circular economy principles. - Data requirements and availabilities for material passports: A digitally enabled framework for improving the circularity of existing buildingsItem type: Journal Article
Sustainable Production and ConsumptionÇetin, Sultan; Raghu, Deepika; Honic-Eser, Meliha; et al. (2023)Passports for circularity, e.g., digital product passports and material passports (MPs), have gained recognition as essential policy instruments for the Circular Economy goals of the European Union. Despite the growing number of approaches, there is a lack of knowledge about the data requirements and availabilities to create MPs for existing buildings. By deploying a mixed-method research design, this study identified the potential users and their data needs within the context of European social housing organisations. Three rounds of validation interviews with a total of 38 participants were conducted to create a data template for an MP covering maintenance, renovation, and demolition stages. This data template was then tested in a case study from the Netherlands to determine critical data gaps in creating MPs, including, but not limited to the composition of materials, presence of toxic or hazardous contents, condition assessment, and reuse and recycling potential of a product. Finally, an MP framework is proposed to address these data gaps by utilising the capabilities of enabling digital technologies (e.g., artificial intelligence and scanning systems) and supportive knowledge of human actors. This framework supports further research and innovation in data provision in creating MPs to narrow, slow, close, and regenerate the loops.
Publications 1 - 7 of 7