[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"settings":3,"$faS9vqC4brh9kVZ2057qFf8HE8Fwi3nkRDMfjygrgNMg":82,"skip-profile-counts":16,"collection-counts-9R_built":103,"/api/collections/9R_built/articles":109,"profile-liked-collections--liked-seeAll":414},{"data":4,"meta":81},{"id":5,"documentId":6,"createdAt":7,"updatedAt":8,"publishedAt":9,"nav_secondary":10,"nav_primary":11},74,"cq0rcn2xoi5no1yfyvbgyln1","2025-06-22T14:25:01.818Z","2026-05-26T16:26:38.254Z","2026-05-26T16:26:38.726Z",[],[12,18,46,51,56,76],{"id":13,"label":14,"url":15,"disable_label_url":16,"children_links":17},699,"About","/about",null,[],{"id":19,"label":20,"url":21,"disable_label_url":16,"children_links":22},703,"Focus areas","programmes",[23,26,30,34,38,42],{"id":24,"label":20,"url":25},1651,"/programmes",{"id":27,"label":28,"url":29},1652,"Cities & regions","/programmes/cities",{"id":31,"label":32,"url":33},1653,"Finance & economics","/programmes/finance",{"id":35,"label":36,"url":37},1654,"Textiles & fashion","/programmes/textiles",{"id":39,"label":40,"url":41},1655,"Jobs & employment","/programmes/jobs",{"id":43,"label":44,"url":45},1656,"Global value chains","/programmes/value-chains",{"id":47,"label":48,"url":49,"disable_label_url":16,"children_links":50},700,"Services","/services",[],{"id":52,"label":53,"url":54,"disable_label_url":16,"children_links":55},701,"Impact","/impact",[],{"id":57,"label":58,"url":59,"disable_label_url":16,"children_links":60},704,"CGR","/cgr",[61,64,68,72],{"id":62,"label":63,"url":59},1657,"About CGR",{"id":65,"label":66,"url":67},1658,"CGR Global","/cgr/cgr-global",{"id":69,"label":70,"url":71},1659,"CGR Nations","/cgr/cgr-national",{"id":73,"label":74,"url":75},1660,"CGR Regions & cities","/cgr/cgr-regions-cities",{"id":77,"label":78,"url":79,"disable_label_url":16,"children_links":80},702,"Resources","/knowledge-hub/search",[],{},{"id":83,"name":84,"description":85,"link":16,"banner_image_url":86,"avatar_image_url":16,"system_reserved":87,"owner_id":88,"owner":89,"contributors":100,"industries":101,"locations":102,"canEdit":87},"9R_built","Built Environment: the 9R Strategies","The construction industry in Europe stands at a critical juncture, facing a unique combination of challenges and opportunities that shape its future. As one of the largest and most impactful sectors, construction plays a central role in developing the cities and infrastructure of tomorrow. \n\nHowever, its environmental impact is significant: the built environment, driven by construction activities and building use, is responsible for 40% of global CO2 emissions and 40% of global resource use. This makes it a major contributor to the transgression of several planetary boundaries, including Climate Change, Land-System Change, and Biosphere Integrity. \n\nThis case study selection highlights circular practices in the reviewed projects based on the 9R circularity framework, which serves as a set of guiding principles for transforming conventional construction practices into more circular and sustainable ones.","https://kh-assets.prod.circularity-gap.world/org-profile-avatar/1778090061204-kIJeCksF.jpeg",false,"ce",{"id":88,"type":90,"owner_id":91,"about":92,"job_title":16,"url":16,"linkedin":16,"email":16,"staff_of_id":16,"organisation_id":88,"owner":93,"organisation":96,"profile":98},"organisation","56NcOv","",{"first_name":94,"last_name":95},"Circle","Economy",{"name":97},"Circle Economy",{"link":99},"https://kh-assets.prod.circularity-gap.world/org-profile-avatar/HiKR8W326OYvfBij.jpg",[],[],[],{"total":104,"byType":105},18,{"business_case":106,"policy_case":107,"blog":108,"resource":108,"report":108},15,3,0,[110,154,185,215,244,273,297,327,356,385],{"id":111,"type":112,"cta":16,"cta_link":16,"created_at":113,"updated_at":114,"owner_id":115,"owner_relationship":116,"views":117,"owner":118,"image":120,"article_locations":124,"article_industries":133,"view_count":117,"like_count":108,"collection_count":140,"content":141},"30050","policy_case","2025-01-28T19:30:51.515Z","2026-06-02T00:35:32.241Z","J5-bZw","collaborator",29,{"id":115,"type":119,"owner_id":115,"about":16,"job_title":16,"url":16,"linkedin":16,"email":16,"staff_of_id":16,"organisation_id":16,"organisation":16},"user",{"id":121,"link":122,"alt":16,"source":16,"created_at":113,"updated_at":123,"article_id":111,"image_profile_id":16,"banner_profile_id":16},"-R1ZFGno9MQ=","https://kh-assets.prod.circularity-gap.world/main-image/1778090623116--KjfMQUb.jpeg","2025-01-29T10:01:10.128Z",[125],{"article_id":111,"location_id":126,"created_at":127,"updated_at":16,"location":128},"660158","2026-05-06T18:02:10.620Z",{"id":126,"type":129,"name":130,"color":16,"parent_location_id":131,"created_at":132,"updated_at":16},"city","Espoo","FIN","2026-02-27T07:55:02.991Z",[134],{"article_id":111,"industry_id":135,"created_at":127,"updated_at":16,"industry":136},"construction_materials_and_products",{"id":135,"name":137,"description":138,"sector":139},"Construction Materials and Products","Producing building materials and finished and semi-finished building products for construction","construction_and_infrastructure",1,{"id":142,"score":108,"body":143,"status":153,"article_id":111,"created_at":113,"updated_at":123,"published_at":113},"gbPP",{"title":144,"outcome":145,"problem":146,"summary":147,"solution":148,"attachment":149},"Kera district: Transformation of a Traditional Industrial Area into a Low-carbon, 20-minute Neighbourhood","\u003Cp>The reuse and recycling of materials have significantly reduced the demand for virgin resources and the environmental footprint of construction activities. Green infrastructure supports urban biodiversity, carbon sequestration, and ecosystem services, while renewable energy systems and low-carbon solutions contribute to climate neutrality.\u003C/p>\u003Cp>The redevelopment is projected to transform the area into a vibrant hub, introducing 14,000 new homes and creating 10,000 employment opportunities centred around sustainable urban development services. Resident participation helps enhance community engagement and ownership of the redevelopment process.\u003C/p>\u003Cp>The \"Kera Area Development Commitment,\" established through the land-use agreement, sets clear objectives and circular principles to guide all projects spanning from the 2020s to the 2040s. The document will ensure flexibility to address evolving needs and technologies while maintaining consistent progress toward sustainability goals. Kera will serve as a testbed for circular urban development, offering insights and replicable practices for other cities in Finland and Europe.\u003C/p>","\u003Cp>The main goal was to ensure a sustainable urban environment while reducing the demand for new raw materials. With this level of ambition, setting clear and long-term targets and objectives has been crucial to the project’s success so far. \u003C/p>","\u003Cp>The Kera district in Espoo, Finland, is undergoing a significant transformation from a former industrial area into a circular, mixed-use neighbourhood housing 14,000 residents. As part of Espoo’s sustainability program, the project integrates circular economy principles, low-carbon construction, renewable energy systems, sustainable mobility, and digital solutions.\u003C/p>","\u003Cp>The Kera district redevelopment plan combines circular and low-carbon measures, serving as a testbed for Espoo's sustainability goals. Measures included reusing materials such as steel beams, concrete slabs, and columns from demolished buildings for new construction projects. Demolition waste was recycled using recycled soils, including concrete aggregates for asphalt and earthworks. Establishing a temporary storage area for secondary materials and a dedicated reuse centre for long-term material repurposing was also part of the implemented solutions. Carbon-binding materials and renewable energy technologies additionally supported the district’s carbon neutrality goals.\u003C/p>\u003Cp>An 85,000 m² network of green spaces, including a central park, was additionally integrated to enhance biodiversity and ecosystem services. The soil was rehabilitated and reused within new developments.\u003C/p>\u003Cp>From a social perspective, spaces were temporarily used for cultural and awareness-raising events, urban agriculture, and recreational activities (e.g., transforming a logistics centre into a hub for street art and exercise). Additionally, collaborative management systems enabled resident participation in decision-making.\u003C/p>",[150],{"name":151,"type":152,"value":151},"https://www.espoo.fi/en/housing-and-building/kera","link","published",{"id":155,"type":156,"cta":16,"cta_link":16,"created_at":157,"updated_at":158,"owner_id":115,"owner_relationship":116,"views":159,"owner":160,"image":161,"article_locations":165,"article_industries":171,"view_count":159,"like_count":108,"collection_count":140,"content":174},"30049","business_case","2025-01-28T18:52:00.813Z","2026-06-02T17:36:28.982Z",37,{"id":115,"type":119,"owner_id":115,"about":16,"job_title":16,"url":16,"linkedin":16,"email":16,"staff_of_id":16,"organisation_id":16,"organisation":16},{"id":162,"link":163,"alt":16,"source":16,"created_at":157,"updated_at":164,"article_id":155,"image_profile_id":16,"banner_profile_id":16},"7ItIXgMolxw=","https://kh-assets.prod.circularity-gap.world/main-image/1778090615955-JOnaIkO_.jpeg","2025-01-29T11:35:35.422Z",[166],{"article_id":155,"location_id":167,"created_at":127,"updated_at":16,"location":168},"2988507",{"id":167,"type":129,"name":169,"color":16,"parent_location_id":170,"created_at":132,"updated_at":16},"Paris","FRA",[172],{"article_id":155,"industry_id":135,"created_at":127,"updated_at":16,"industry":173},{"id":135,"name":137,"description":138,"sector":139},{"id":175,"score":108,"body":176,"status":153,"article_id":155,"created_at":157,"updated_at":164,"published_at":157},"ctV2",{"title":177,"outcome":178,"problem":179,"summary":180,"solution":181,"attachment":182},"Transformation and redevelopment of the former Hospital Saint-Vincent-de-Paul area","\u003Cp>The redevelopment, valued at €182 million, is set to become Paris’s first zero-carbon, zero-waste district, establishing a benchmark for sustainable urban planning and community involvement. Compared to traditional methods, circular construction strategies reduced greenhouse gas emissions by 30%. 60% of buildings are being conserved and renovated, reducing waste and virgin resource consumption.\u003C/p>\u003Cp>Regarding the social impact, the project promotes social diversity with inclusive housing options and economic opportunities through businesses, services, and public facilities. Participatory planning fosters community engagement and shared responsibility for the neighbourhood's success.\u003C/p>\u003Cp>Advanced tools like Urban Print and LCAs provided critical insights into resource and carbon impacts, setting a standard for lifecycle-oriented urban planning.\u003C/p>\u003Cp>The project’s success offers a blueprint for other urban redevelopment initiatives, demonstrating how circularity and urban metabolism principles can guide sustainable transformation.\u003C/p>","\u003Cp>The main issue of the project is achieving a zero-carbon, zero-waste district while retaining 60% of the existing buildings and preserving historical significance.\u003C/p>\u003Cp>Managing the systematic recovery, cataloging, and reusing building materials and components during demolition and reconstruction can be challenging.\u003C/p>","\u003Cp>The historic Saint-Vincent-de-Paul hospital complex in central Paris is being transformed into a mixed-use eco-neighborhood focused on sustainability, social diversity, and circular urban development. This project, led by Paris Métropole Aménagement and due for 2025, integrates circular construction strategies, preserves architectural heritage, and incorporates green infrastructure and renewable energy systems.\u003C/p>","\u003Cp>The project retained 60% of the existing buildings to minimise demolition and reused salvaged materials (e.g., limestone slabs, brick panels, and other building components) both on- and off-site. Materials unsuitable for reuse were recycled into aggregates for new construction.\u003C/p>\u003Cp>Tools like Urban Print software, life cycle assessments (LCAs), material passports, and carbon footprint analyses guided decision-making and ensured resource optimisation throughout the redevelopment process.\u003C/p>\u003Cp>The design incorporates a 4,000 m² green public space, green façades, and roofs, fostering biodiversity. It leverages Paris’s non-potable water network and heat exchange systems to achieve 100% renewable energy use by 2050.\u003C/p>\u003Cp>Housing options include 50% social, 30% open-access, and 20% intermediate housing. Participatory planning actively involves future residents and stakeholders in shaping the district’s design, fostering a sense of community ownership.\u003C/p>\u003Cp>In addition, historic elements, such as English courtyards, were repurposed for modern functions like shops and business spaces.\u003C/p>",[183],{"name":184,"type":152,"value":184},"https://www.paris.fr/pages/saint-vincent-de-paul-14e-2373/",{"id":186,"type":112,"cta":16,"cta_link":16,"created_at":187,"updated_at":188,"owner_id":115,"owner_relationship":116,"views":106,"owner":189,"image":190,"article_locations":194,"article_industries":201,"view_count":106,"like_count":108,"collection_count":140,"content":204},"30048","2025-01-28T18:19:19.729Z","2026-06-02T17:20:03.068Z",{"id":115,"type":119,"owner_id":115,"about":16,"job_title":16,"url":16,"linkedin":16,"email":16,"staff_of_id":16,"organisation_id":16,"organisation":16},{"id":191,"link":192,"alt":16,"source":16,"created_at":187,"updated_at":193,"article_id":186,"image_profile_id":16,"banner_profile_id":16},"M-IQlUnmGm8=","https://kh-assets.prod.circularity-gap.world/main-image/1778090613376-nuw-4D2D.jpeg","2025-01-29T11:44:25.304Z",[195],{"article_id":186,"location_id":196,"created_at":127,"updated_at":16,"location":197},"2747891",{"id":196,"type":129,"name":198,"color":16,"parent_location_id":199,"created_at":200,"updated_at":16},"Rotterdam","NLD","2026-02-27T07:55:14.722Z",[202],{"article_id":186,"industry_id":135,"created_at":127,"updated_at":16,"industry":203},{"id":135,"name":137,"description":138,"sector":139},{"id":205,"score":108,"body":206,"status":153,"article_id":186,"created_at":187,"updated_at":193,"published_at":187},"S41v",{"title":207,"outcome":208,"problem":209,"summary":210,"solution":211,"attachment":212},"De HER: A Circularity Centre out of Materials From a Dismantled Building","\u003Cp>By reusing materials from the Delft laboratory, De HER avoided waste creation, reduced greenhouse gas emissions, and lowered embodied carbon compared to traditional construction methods. The project preserved natural resources by minimising the need for virgin materials. Materials passports, 3D modelling, and modular construction techniques streamlined the reuse process, offering a replicable approach for future circular construction projects. De HER demonstrated the feasibility of reusing entire buildings, providing a model for future projects in Rotterdam and beyond. Its success supports the city’s goal of halving primary raw material use by 2030.\u003C/p>\u003Cp>The project also had some social benefits. The Upcycling Mall and circular centre are interactive spaces for education, creativity, and community engagement. The facility has become a resource for students, residents, and circular entrepreneurs, strengthening the local circular economy. By creating spaces for collaboration, workshops, and social interaction, De HER fosters a sense of shared responsibility for sustainability among residents, businesses, and visitors.\u003C/p>","\u003Cp>A key challenge for projects prioritising reuse is the unpredictability of material availability and its quality, condition, and quantity, which influences the project’s logistics and design processes. Due to the variability of reused materials and the iterative design process, acquiring permits to meet aesthetic and functional urban standards was more demanding. In general, circular projects involve unpredictable logistics, high initial costs, and the need for advanced tools and processes to optimise resource use.\u003C/p>","\u003Cp>De HER is a pioneering circular environmental park in Rotterdam designed to promote awareness, education, and entrepreneurship in circular practices. By 2025, it will be constructed using materials salvaged from a dismantled laboratory in Delft, De HER demonstrates the feasibility of reusing entire buildings or new construction.\u003C/p>","\u003Cp>Reusing materials required addressing uncertainties about availability, quality, and condition, which often complicated project timelines and logistics. In De HER’s case, most materials were harvested from a single source: the dismantled Delft laboratory, significantly reducing typical challenges associated with sourcing and securing materials. All materials were pre-documented in a materials passport, facilitating assessment and reuse.\u003C/p>\u003Cp>The building was constructed with modularity in mind, enabling efficient use of space and ensuring components could be easily dismantled and reused in the future, further extending the lifecycle of materials. Tools such as 3D modelling and structural assessments optimised the reuse of materials with minimal modifications, reducing energy demands and improving resource efficiency.\u003C/p>\u003Cp>The municipality of Rotterdam aims to leverage this facility to increase both individual and corporate capacity for circularity. It offers a blend of practical, hands-on activities and educational opportunities, making it a dynamic environment for learning and development. \u003C/p>\u003Cp>Additionally, the facility hosts school tours, internships, and research opportunities, inspiring future generations to adopt circularity in their lifestyles and careers.\u003C/p>",[213],{"name":214,"type":152,"value":214},"https://rotterdamcirculair.nl/de-her/over-de-her",{"id":216,"type":156,"cta":16,"cta_link":16,"created_at":217,"updated_at":218,"owner_id":115,"owner_relationship":116,"views":219,"owner":220,"image":221,"article_locations":225,"article_industries":230,"view_count":219,"like_count":108,"collection_count":140,"content":233},"30047","2025-01-28T17:23:03.166Z","2026-05-31T05:41:12.628Z",26,{"id":115,"type":119,"owner_id":115,"about":16,"job_title":16,"url":16,"linkedin":16,"email":16,"staff_of_id":16,"organisation_id":16,"organisation":16},{"id":222,"link":223,"alt":16,"source":16,"created_at":217,"updated_at":224,"article_id":216,"image_profile_id":16,"banner_profile_id":16},"z1tlj77q76o=","https://kh-assets.prod.circularity-gap.world/main-image/1778090611668-30SUetUU.jpeg","2025-01-29T12:15:25.157Z",[226],{"article_id":216,"location_id":227,"created_at":127,"updated_at":16,"location":228},"2759794",{"id":227,"type":129,"name":229,"color":16,"parent_location_id":199,"created_at":200,"updated_at":16},"Amsterdam",[231],{"article_id":216,"industry_id":135,"created_at":127,"updated_at":16,"industry":232},{"id":135,"name":137,"description":138,"sector":139},{"id":234,"score":108,"body":235,"status":153,"article_id":216,"created_at":217,"updated_at":224,"published_at":217},"Y4zO",{"title":236,"outcome":237,"problem":238,"summary":239,"solution":240,"attachment":241},"De Warren: A Communal Housing Project Based on Flexible Spaces and Material Reuse, Amsterdam, Netherlands","\u003Cp>The project sequestered over 300 tons of CO2 by using approximately 330 cubic meters of reclaimed wood, reducing the demand for virgin materials.\u003C/p>\u003Cp>By overcoming challenges in material reuse, the project demonstrated the viability of circular construction practices. Tools like parametric modelling and partnerships with innovative contractors showed how to optimise reclaimed materials and cut costs effectively.\u003C/p>\u003Cp>In parallel, nature-inclusive features created habitats for local wildlife and improved stormwater management, contributing to a healthier urban ecosystem.\u003C/p>\u003Cp>From a more social perspective, shared spaces and facilities strengthened community bonds, reduced individual resource consumption, and exemplified the \"access over ownership\" model.\u003C/p>\u003Cp>Winning the 2023 Amsterdam Architecture Prize highlighted De Warren as a model for sustainable and affordable urban living, encouraging other developers to adopt similar methods.\u003C/p>","\u003Cp>Sourcing, testing, and repurposing materials like timber from fender systems and mooring posts introduced risks related to structural integrity, fire safety certification, and processing costs.\u003C/p>\u003Cp>Finding a contractor willing to embrace the experimental nature of the project was difficult, as contractors were wary of risks associated with material reuse, high costs, and the intense housing market.\u003C/p>\u003Cp>Incorporating advanced technologies, such as geothermal heat systems and parametric modelling, added complexity to the design and construction process.\u003C/p>\u003Cp>Besides, the design had to foster communal living while balancing affordability, sustainability, and social inclusivity.\u003C/p>","\u003Cp>De Warren is a communal housing project and living lab in Centrumeiland, Amsterdam. It exemplifies circular design principles and sustainable living, focusing on bio-based materials and community-focused living. De Warren integrates reclaimed materials, renewable energy systems, and a nature-inclusive design, significantly reducing carbon emissions and environmental impact.\u003C/p>","\u003Cp>The project includes 16 social and 20 mid-rent homes, with 30% of the space dedicated to communal areas.\u003C/p>\u003Cp>Repurposed and biobased materials were predominantly used. De Warren repurposed wood for exterior cladding, balconies, and retaining walls. \u003C/p>\u003Cp>The building features energy piles for geothermal heating and cooling, and photovoltaic panels for renewable energy. The building's nature-inclusive design further enhances sustainability by integrating features to support biodiversity (façade gaps for bats, wooden cladding for bird nests, green rooftop to attract insects and birds) \u003C/p>\u003Cp>The cooperative emphasised shared facilities, including kitchens, bathrooms, and semi-public spaces. Shared tools, cars, and spaces encouraged a “sharing economy” approach.\u003C/p>\u003Cp>Summum Engineering developed parametric modelling tools to design and optimise using irregular reclaimed materials efficiently. The corporation partnered with ToekomstGroep, a contractor experienced in sustainable construction.\u003C/p>",[242],{"name":243,"type":152,"value":243},"https://www.natrufied.nl/portfolio/de-warren/",{"id":245,"type":156,"cta":16,"cta_link":16,"created_at":246,"updated_at":247,"owner_id":115,"owner_relationship":116,"views":248,"owner":249,"image":250,"article_locations":254,"article_industries":259,"view_count":248,"like_count":108,"collection_count":140,"content":262},"30046","2025-01-28T15:48:35.136Z","2026-06-02T08:18:49.859Z",20,{"id":115,"type":119,"owner_id":115,"about":16,"job_title":16,"url":16,"linkedin":16,"email":16,"staff_of_id":16,"organisation_id":16,"organisation":16},{"id":251,"link":252,"alt":16,"source":16,"created_at":246,"updated_at":253,"article_id":245,"image_profile_id":16,"banner_profile_id":16},"98r7bVmqHEg=","https://kh-assets.prod.circularity-gap.world/main-image/1778090610991-wl2Xz-O7.jpeg","2025-01-29T12:33:16.724Z",[255],{"article_id":245,"location_id":256,"created_at":127,"updated_at":16,"location":257},"2756071",{"id":256,"type":129,"name":258,"color":16,"parent_location_id":199,"created_at":200,"updated_at":16},"Enschede",[260],{"article_id":245,"industry_id":135,"created_at":127,"updated_at":16,"industry":261},{"id":135,"name":137,"description":138,"sector":139},{"id":263,"score":108,"body":264,"status":153,"article_id":245,"created_at":246,"updated_at":253,"published_at":246},"Ad2-",{"title":265,"outcome":266,"problem":267,"summary":268,"solution":269,"attachment":270},"Villa Welpeloo: A Residential House Made From Locally Sourced Reused Materials","\u003Cp>Relying on locally sourced repurposed materials resulted in the building using 60% reclaimed materials and decreasing the construction's CO2 emissions by 90%. The project minimised its impact on biodiversity by avoiding extracting and processing natural resources.\u003C/p>\u003Cp>By addressing challenges such as the unpredictability of material properties and the absence of standardised methods, this project highlights how tools like the harvest map can simplify the integration of reclaimed materials and pave the way for smoother circular construction workflows.\u003C/p>","\u003Cp>The initial phase of the design process for Villa Welpeloo required an extended timeline as architects faced the challenge of sourcing suitable reused materials. This process included conducting extensive research, performing rigorous material tests to ensure quality and safety, and engaging in consultations with engineers to navigate the complexities of material reuse. Challenges, such as the toxicity of railway slabs (initially intended for the building's structure) and the lack of standardised processing methods, required design adjustments and on-site modifications.\u003C/p>","\u003Cp>Villa Welpeloo is a residential home with storage for the residents' art collection, an exhibition space, a studio, and a guest house. The project prioritised sustainability, achieving a 90% reduction in CO2 emissions and a 60% reduction in raw material usage compared to traditional construction methods.\u003C/p>","\u003Cp>The project adopted a ‘dynamic final design’ approach, allowing flexibility to incorporate reclaimed materials as they become available, enabling high levels of reuse.\u003C/p>\u003Cp>Approximately 60% of the materials, including the steel structure (90%), floors, insulation, facade cladding, and custom cabinetry, were repurposed from local waste sources. Everyday objects like umbrella spokes and plastic coffee cups were used creatively for fixtures and wall cladding.\u003C/p>\u003Cp>This project served as a proof of concept for Superuse’s material harvesting strategy and laid the foundation for future circular building projects. This includes the creation of Oogstkaart, an online platform for mapping and tracking waste materials. This tool streamlined material sourcing and laid the groundwork for more efficient circular construction in the future.\u003C/p>",[271],{"name":272,"type":152,"value":272},"https://www.superuse-studios.com/projectplus/villa-welpeloo/",{"id":274,"type":156,"cta":16,"cta_link":16,"created_at":275,"updated_at":276,"owner_id":115,"owner_relationship":116,"views":106,"owner":277,"image":278,"article_locations":282,"article_industries":283,"view_count":106,"like_count":108,"collection_count":140,"content":286},"30044","2025-01-28T15:13:11.037Z","2026-06-01T08:55:17.754Z",{"id":115,"type":119,"owner_id":115,"about":16,"job_title":16,"url":16,"linkedin":16,"email":16,"staff_of_id":16,"organisation_id":16,"organisation":16},{"id":279,"link":280,"alt":16,"source":16,"created_at":275,"updated_at":281,"article_id":274,"image_profile_id":16,"banner_profile_id":16},"CADWvs-hAnk=","https://kh-assets.prod.circularity-gap.world/main-image/1778090609896-qgmq5NwZ.jpeg","2025-01-29T12:53:46.965Z",[],[284],{"article_id":274,"industry_id":135,"created_at":127,"updated_at":16,"industry":285},{"id":135,"name":137,"description":138,"sector":139},{"id":287,"score":108,"body":288,"status":153,"article_id":274,"created_at":275,"updated_at":281,"published_at":275},"Z3bi",{"title":289,"outcome":290,"problem":291,"summary":292,"solution":293,"attachment":294},"Rathaus Korbach: An Urban Mining Concept Based on Selective Demolition","\u003Cp>The Ministry’s primary goal was to showcase the feasibility of circular construction practices, specifically in the context of selective demolition and local recycling of building materials. The framework proved that building with recycled and reused materials is feasible and replicable.\u003C/p>\u003Cp>Besides, the project highlighted the need for improved material processing technologies to address bonding issues in future projects, shedding light on both the complexities and the potential of circular construction.\u003C/p>\u003Cp>The regional authorities recognised the Korbach Town Hall project as a blueprint for circular construction. It offers practical guidelines for resource-saving building practices that align with the sustainable urban development standards in the Hesse region.\u003C/p>","\u003Cp>The existing 1970s Town Hall extension was deemed unsuitable for renovation, requiring its replacement. Despite this meticulous planning, issues arose during the implementation phase, particularly with the bonding materials in the original structure. As a result, the quality of the recycled materials that could be recovered was limited, which reduced the availability of high-quality aggregates for the new building’s concrete.\u003C/p>","\u003Cp>The Rathaus Korbach project deconstructed a 1970s Town Hall extension to create a new, sustainably designed municipal building. By prioritising selective demolition, local recycling, and the reuse of materials, the project achieved a circular construction model.\u003C/p>","\u003Cp>Regardless of this setback, the project successfully benefited from local recycling and reuse. \u003C/p>\u003Cp>Approximately 5,400 tonnes of concrete from the ceilings, beams, and columns of the existing 1970s building were recycled, with up to 50% of this material processed as recycled stone aggregates to reinforce the supporting structure of the new building. Additionally, around 23 tonnes of brick fragments were integrated into the facade, while finer particles from the demolition were used to fill the construction pit on-site. This method reduced the need for new materials while retaining the value of existing resources. \u003C/p>\u003Cp>The new building was also designed to serve as a future material bank, with features that facilitate easy disassembly and recycling. For example, the new roof features a zinc covering paired with detachable insulation made predominantly from secondary raw materials, including glass wool and foam glass.\u003C/p>\u003Cp>This project, initiated by the city of Korbach, prioritised local recycling facilities, which played a key role in reducing transportation and disposal costs while supporting the regional economy.\u003C/p>",[295],{"name":296,"type":152,"value":296},"https://www.korbach.de/Stadt/Bauen-Umwelt/Wohnen-Planen-Bauen/Bauprojekte/Rathausneubau/",{"id":298,"type":156,"cta":16,"cta_link":16,"created_at":299,"updated_at":300,"owner_id":115,"owner_relationship":116,"views":301,"owner":302,"image":303,"article_locations":307,"article_industries":313,"view_count":301,"like_count":108,"collection_count":140,"content":316},"30042","2025-01-28T11:07:42.185Z","2026-05-29T00:00:53.519Z",12,{"id":115,"type":119,"owner_id":115,"about":16,"job_title":16,"url":16,"linkedin":16,"email":16,"staff_of_id":16,"organisation_id":16,"organisation":16},{"id":304,"link":305,"alt":16,"source":16,"created_at":299,"updated_at":306,"article_id":298,"image_profile_id":16,"banner_profile_id":16},"hQcJkgXw21c=","https://kh-assets.prod.circularity-gap.world/main-image/1778090608192-LnJ3NDt0.jpeg","2025-01-29T13:00:46.690Z",[308],{"article_id":298,"location_id":309,"created_at":127,"updated_at":16,"location":310},"2928810",{"id":309,"type":129,"name":311,"color":16,"parent_location_id":312,"created_at":132,"updated_at":16},"Essen","DEU",[314],{"article_id":298,"industry_id":135,"created_at":127,"updated_at":16,"industry":315},{"id":135,"name":137,"description":138,"sector":139},{"id":317,"score":108,"body":318,"status":153,"article_id":298,"created_at":299,"updated_at":306,"published_at":299},"4b8N",{"title":319,"outcome":320,"problem":321,"summary":322,"solution":323,"attachment":324},"RAG Administration Building: Leveraging C2C Design and Material Passports","\u003Cp>Circular design minimised waste and transformed the building into a raw material repository. Material passports enhanced the transparency of resources, making them assets for future projects and setting a standard for regenerative construction.\u003C/p>\u003Cp>Renewable energy systems and the green roof supported biodiversity and reduced environmental impact.\u003C/p>\u003Cp>The building created a flexible, healthy workplace and welcoming public spaces, enhancing employee and visitor experiences. The green roof offered opportunities for recreation and connection with the natural landscape.\u003C/p>\u003Cp>The area's transformation attracted over two million visitors annually, boosting the site's cultural and economic importance.\u003C/p>\u003Cp>As one of Germany’s first C2C-designed buildings, the project demonstrated the feasibility and benefits of circular construction, inspiring architects, contractors, and policymakers to adopt similar principles.\u003C/p>","\u003Cp>Aligning the project with the site's cultural and environmental significance was challenging. This involved balancing industrial heritage with natural revitalisation, biodiversity support, and energy efficiency.\u003C/p>","\u003Cp>The RAG Foundation Administration’s new building exemplifies sustainable design through adherence to cradle-to-cradle (C2C) principles. This circular construction approach ensures that all materials retain value at the end of the building's lifecycle, enabling reuse, recycling, or reintegration into nature. The project revitalises a historically industrial area, blending cultural heritage with nature and sustainability.\u003C/p>","\u003Cp>Materials were selected based on C2C principles, ensuring their reusability, recyclability, or ability to reintegrate into nature. Material passports documented every component, detailing its origin, composition, and instructions for future reuse. This ensured traceability and long-term value retention of materials, transforming the building into a temporary material bank. Regional materials were prioritised, reducing transportation impacts and supporting the local economy.\u003C/p>\u003Cp>Modular partition walls and lightweight materials were installed to make indoor spaces flexible and adaptable, while adhesive bonding was replaced with mechanical connections, enabling easy disassembly.\u003C/p>\u003Cp>A green roof compensated for soil sealing increased biodiversity with urban gardening and bat boxes and provided a rainwater retention area. Similarly, advanced insulation, dust-binding carpets, and green walls improved indoor air quality and comfort.\u003C/p>\u003Cp>Renewable energy systems include photovoltaic installations and geothermal energy to maximise energy efficiency.\u003C/p>\u003Cp>Finally, the design respected the site's industrial heritage while transforming it into a hub for art, culture, and recreation.\u003C/p>",[325],{"name":326,"type":152,"value":326},"https://www.kadawittfeldarchitektur.de/en/projekt/rag-stiftung-und-rag-ag-zollverein/",{"id":328,"type":156,"cta":16,"cta_link":16,"created_at":329,"updated_at":330,"owner_id":115,"owner_relationship":116,"views":331,"owner":332,"image":333,"article_locations":337,"article_industries":342,"view_count":331,"like_count":108,"collection_count":140,"content":345},"30041","2025-01-28T10:36:51.399Z","2026-06-02T12:46:12.404Z",43,{"id":115,"type":119,"owner_id":115,"about":16,"job_title":16,"url":16,"linkedin":16,"email":16,"staff_of_id":16,"organisation_id":16,"organisation":16},{"id":334,"link":335,"alt":16,"source":16,"created_at":329,"updated_at":336,"article_id":328,"image_profile_id":16,"banner_profile_id":16},"t-sT7-et8iA=","https://kh-assets.prod.circularity-gap.world/main-image/1778090604422-qrNJEIXI.jpeg","2025-01-29T16:32:51.416Z",[338],{"article_id":328,"location_id":339,"created_at":127,"updated_at":16,"location":340},"2756619",{"id":339,"type":129,"name":341,"color":16,"parent_location_id":199,"created_at":200,"updated_at":16},"Driebergen-Rijsenburg",[343],{"article_id":328,"industry_id":135,"created_at":127,"updated_at":16,"industry":344},{"id":135,"name":137,"description":138,"sector":139},{"id":346,"score":108,"body":347,"status":153,"article_id":328,"created_at":329,"updated_at":336,"published_at":329},"lR89",{"title":348,"outcome":349,"problem":350,"summary":351,"solution":352,"attachment":353},"Triodos Bank Head Office: Timber-based Headquarters Built as a Material Bank","\u003Cp>The predominantly wooden structure stored over 1,633 tonnes of CO2 equivalent, reducing reliance on resource-intensive materials. Solar panels, geothermal systems, and rainwater collection further enhanced sustainability.\u003C/p>\u003Cp>The material passport system documented every component, ensuring future reuse and reducing construction and demolition waste.\u003C/p>\u003Cp>In addition, by adopting reversible design principles, the building became a repository of valuable resources, fostering a shift toward sustainable architectural practices.\u003C/p>\u003Cp>The project also revitalised the natural environment and promoted recreational use without disrupting local wildlife.\u003C/p>\u003Cp>Overall, the project demonstrated the feasibility of circular construction, offering a blueprint for future developments and contributing to the broader adoption of sustainable design practices.\u003C/p>","\u003Cp>The challenge was constructing a highly sustainable office building that minimised environmental impact, reduced resource use, and fostered a regenerative relationship with the natural environment.\u003C/p>\u003Cp>Designing a structure that could be disassembled and repurposed at the end of its lifecycle was challenging. It required developing a system to document and manage all construction materials for future reuse. In addition, data management challenges had to be addressed for seamless collaboration across stakeholders. Overall, the project had to integrate sustainability principles while preserving the surrounding natural habitat.\u003C/p>","\u003Cp>Triodos Bank's office on the De Reehorst Estate in Zeist, Netherlands, exemplifies how architecture can merge circular economy principles with environmental stewardship. Designed with biomimicry and circularity principles, the building is a “material bank” — fully disassemblable and optimised for material reuse.\u003C/p>","\u003Cp>The reversible design of the Triodos Bank office enables it to function as a material bank. Every material is documented on a digital platform with a “material passport” system, ensuring that building materials remain valuable over time.\u003C/p>\u003Cp>Over 82% of the structural framework was built using wood and timber sourced partially from the estate. This avoided resource-intensive materials like concrete except where necessary for water management in the basement.\u003C/p>\u003Cp>Modular and multifunctional designs involved offices being positioned to maximise natural daylight, and areas not requiring natural light were placed in the basement.\u003C/p>\u003Cp>Geothermal systems were installed to efficiently manage heating and cooling, while solar panels used energy flow to charge electric vehicles.\u003C/p>\u003Cp>Triodos Bank reused approximately 400 existing workstations, refurbished existing tabletops, reused frames, and added components to neatly organise cables.\u003C/p>\u003Cp>The building site, previously developed land within a forest reserve, was chosen to limit disruption to natural habitats. Design considerations included avoiding bat flight paths and minimising light pollution.\u003C/p>",[354],{"name":355,"type":152,"value":355},"https://www.rau.eu/portfolio/triodos-bank-nederland/",{"id":357,"type":156,"cta":16,"cta_link":16,"created_at":358,"updated_at":359,"owner_id":115,"owner_relationship":116,"views":360,"owner":361,"image":362,"article_locations":366,"article_industries":371,"view_count":360,"like_count":108,"collection_count":140,"content":374},"30040","2025-01-28T09:53:52.230Z","2026-06-01T10:43:48.861Z",11,{"id":115,"type":119,"owner_id":115,"about":16,"job_title":16,"url":16,"linkedin":16,"email":16,"staff_of_id":16,"organisation_id":16,"organisation":16},{"id":363,"link":364,"alt":16,"source":16,"created_at":358,"updated_at":365,"article_id":357,"image_profile_id":16,"banner_profile_id":16},"1B-o-XsmS3Y=","https://kh-assets.prod.circularity-gap.world/main-image/1778090603034-JDwvEUkk.jpeg","2025-01-29T16:54:13.253Z",[367],{"article_id":357,"location_id":368,"created_at":127,"updated_at":16,"location":369},"2910831",{"id":368,"type":129,"name":370,"color":16,"parent_location_id":312,"created_at":132,"updated_at":16},"Hannover",[372],{"article_id":357,"industry_id":135,"created_at":127,"updated_at":16,"industry":373},{"id":135,"name":137,"description":138,"sector":139},{"id":375,"score":108,"body":376,"status":153,"article_id":357,"created_at":358,"updated_at":365,"published_at":358},"08hG",{"title":377,"outcome":378,"problem":379,"summary":380,"solution":381,"attachment":382},"Recyclinghaus am Kronsberg: Exploring the Potential of Comprehensive Circular Design","\u003Cp>More than half of the interior materials were recycled, significantly reducing raw material demand. Renewable materials, like wooden elements, sequestered approximately 100 tonnes of CO2eq. Sourcing materials locally minimised transportation emissions and reduced construction waste. Besides, the house meets low-energy standards, further reducing operational energy use.\u003C/p>\u003Cp>While the project cost (€6,000/m²) exceeded conventional building costs, it also showcased a potential commercial approach to sustainable circular construction from reused and recycled materials. The project highlighted the potential for cost reductions as circular practices become more standardised and supported by public infrastructure.The challenges encountered in the project emphasised the needs still existing for such projects (e.g., securing materials early, having proper documentation on reusing, establishing public material banks, etc.).\u003C/p>","\u003Cp>The construction sector is a high-impact industry, contributing significantly to CO2 emissions and resource consumption. The Recycling House project set an ambitious goal to use 100% secondary materials to test and demonstrate the potential of circular construction.\u003C/p>\u003Cp>Uncertainty about material availability also forced modifications to standard processes. For example, since Kronsberg regulations require triple-glazed windows and suitable second-hand options were unavailable, Gundlach had to adapt the reused window frames they collected to meet these requirements.\u003C/p>\u003Cp>Unexpected high costs and additional time associated with sourcing, processing, and installing reused components were encountered. The lack of documentation regarding secondary materials contributed to these issues.\u003C/p>\u003Cp>Overall, The project highlighted the critical need for adequate storage space and materials handling (e.g., material passports).\u003C/p>","\u003Cp>The Recycling House, completed in 2019, is a groundbreaking residential prototype in Germany that explores circular construction by maximising the use of secondary materials. Designed to reduce CO2 emissions and resource consumption in the construction sector, the project incorporated reused and recycled materials, adopted design-for-disassembly principles and tested innovative circular strategies.\u003C/p>","\u003Cp>Gundlach was crucial in sourcing reused materials from their building stock and local demolition and renovation projects. A standout example is the building’s façade, 90% of which is cladding made with four different reused materials, all sourced locally from Gundlach’s demolition and conversion projects. The project innovatively used materials like jute cocoa bean bags for wall insulation, and the foundation was made of 42% recycled concrete.\u003C/p>\u003Cp>Elements were designed for future reusability, avoiding adhesives and chemicals that would compromise material value. Exposed copper heating pipes and solid wood components were mounted for easy disassembly and reuse.\u003C/p>\u003Cp>The Cityförster team conducted pioneering methods for sourcing secondary materials, adapting their design to the available resources, and finding alternatives to unavailable parts.\u003C/p>",[383],{"name":384,"type":152,"value":384},"https://www.gundlach-bau.de/zuhause-mieten/mit-gutem-gefuehl-mieten/referenzen/recyclinghaus",{"id":386,"type":112,"cta":16,"cta_link":16,"created_at":387,"updated_at":388,"owner_id":115,"owner_relationship":116,"views":389,"owner":390,"image":391,"article_locations":395,"article_industries":400,"view_count":389,"like_count":108,"collection_count":140,"content":403},"30013","2025-01-24T17:59:50.868Z","2026-06-02T18:16:32.155Z",30,{"id":115,"type":119,"owner_id":115,"about":16,"job_title":16,"url":16,"linkedin":16,"email":16,"staff_of_id":16,"organisation_id":16,"organisation":16},{"id":392,"link":393,"alt":16,"source":16,"created_at":387,"updated_at":394,"article_id":386,"image_profile_id":16,"banner_profile_id":16},"UE2H1AR55aU=","https://kh-assets.prod.circularity-gap.world/main-image/1778090600340--dJ6g-YZ.jpeg","2025-01-29T17:24:23.344Z",[396],{"article_id":386,"location_id":397,"created_at":127,"updated_at":16,"location":398},"2745641",{"id":397,"type":129,"name":399,"color":16,"parent_location_id":199,"created_at":200,"updated_at":16},"Venlo",[401],{"article_id":386,"industry_id":135,"created_at":127,"updated_at":16,"industry":402},{"id":135,"name":137,"description":138,"sector":139},{"id":404,"score":108,"body":405,"status":153,"article_id":386,"created_at":387,"updated_at":394,"published_at":387},"6idj",{"title":406,"outcome":407,"problem":408,"summary":409,"solution":410,"attachment":411},"Cradle-to-Cradle Construction of Venlo’s New City Hall","\u003Cp>The building is energy-neutral and waste-free. The green facade absorbs 30% of local air pollutants, offsetting traffic emissions and enhancing biodiversity.\u003C/p>\u003Cp>In addition to environmental impacts, the open-house concept provides 630 flexible workspaces, a theatre, a cafe, and public gardens, fostering community interaction and well-being. The building’s design also improves indoor air quality, creating a healthier workspace.\u003C/p>\u003Cp>Economic-wise, circular design strategies resulted in an 11.5% return on investment over 40 years, equating to €16.8 million. Residual material value and design-for-disassembly strategies are projected to save €175,000 annually.\u003C/p>\u003Cp>Material passports established a replicable model, and the project spurred advancements in C2C practices, with suppliers obtaining certifications and adopting lifecycle-oriented approaches.\u003C/p>","\u003Cp>The city council sought to demonstrate leadership in circular construction by building a City Hall that followed C2C and circular principles to minimise waste and promote material reuse. Because of this selective approach, stakeholders were constantly challenged during the design phase to identify the best material choices and achieve high circularity and sustainability, while navigating the constraints of scalability and cost-effectiveness for a project of this magnitude.\u003C/p>","\u003Cp>Venlo’s new City Hall, built with an investment of €53 million, exemplifies Cradle-to-Cradle (C2C) and circular construction principles. Equipped with innovative features like a rainwater management system, reusable materials, and the largest green facade in the world, the project showcases the long-term economic and environmental benefits of C2C practices while regenerating its urban setting.\u003C/p>","\u003Cp>C2C-certified materials were chosen for their transparency, recyclability, and renewability, avoiding non-recyclable options.\u003C/p>\u003Cp>The building was designed for disassembly, with materials treated to enable future reuse. Spaces were designed for multi-purpose use, enabling the building to adapt to changing needs over time.\u003C/p>\u003Cp>The building included a 200 m² interior green facade and the world’s largest exterior green facade, purifying indoor and outdoor air while supporting biodiversity. In parallel, rainwater and wastewater management systems minimise resource usage and enhance ecosystem services.\u003C/p>\u003Cp>Kraaijvanger devoted considerable resources to knowledge sharing among partners during the design and construction phases.\u003C/p>\u003Cp>The building functions as a material bank, retaining financial value in its components for future reuse. Material passports were created to document all building elements' composition, properties, and disassembly instructions, ensuring long-term reuse and recycling. \u003C/p>",[412],{"name":413,"type":152,"value":413},"https://www.kraaijvanger.nl/en/projects/city-hall-venlo/",[]]