scholarly journals IMPLEMENTATION STAGE FOR CIRCULAR ECONOMY IN THE DANISH BUILDING AND CONSTRUCTION SECTOR

Detritus ◽  
2021 ◽  
pp. 26-30
Author(s):  
Lisbeth M. Ottosen ◽  
Lotte B. Jensen ◽  
Thomas Astrup ◽  
Tim C. McAloone ◽  
Morten Ryberg ◽  
...  
Keyword(s):  
Value Chain ◽  
Circular Economy ◽  
Construction Materials ◽  
Ghg Emissions ◽  
Construction Sector ◽  
Technical Documentation ◽  
Structured Interviews ◽  
Common Definition ◽  
Scaling Methods ◽  
Framework Conditions

The building and construction sector is selected by the European Commission as a key product value chain in the transition towards circular economy (CE) due to the major resource consumption, waste generation and GHG emissions from this sector. This paper reports the result from qualitative and semi-structured interviews with 30 Danish stakeholders from the sector on the current stage of implementation of CE and the research/innovation needs to scale circular construction from niche to mainstream. The interviews showed a large variety in the stakeholder’s stage of transition from hardly knowing the term to having CE as a major driver in their business. Some meant that scaling of CE is close to impossible and that material reuse will never develop to more than a niche, whereas others already offer full-scale circular solutions to clients. The interviews pointed at a need for a common definition and terminology for CE, methods for documenting the gains from the circular solutions (economic and environmental), methods for technical documentation of the quality of reused materials, processes which enables scaling, methods to implement CE in various systems such as digitalization and building passports, new value chains and framework conditions in support of circularity. Regardless these needs, demonstration projects of major importance to gain general knowledge have been built or are planned in Denmark. These demonstrations have different approaches: using todays waste from different industries as construction materials; reusing construction materials (the basic building, elements or processed materials); and designing new buildings for disassembly to enable future reuse.

scholarly journals Green business models transformation: evidence from the UK construction sector

2016 ◽  
Vol 6 (5) ◽  
pp. 478-490 ◽  
Author(s):  
Amal Abuzeinab ◽  
Mohammed Arif ◽  
Dennis J. Kulonda ◽  
Bankole Osita Awuzie
Keyword(s):  
Value Creation ◽  
Value Chain ◽  
Business Models ◽  
Essential Elements ◽  
Construction Sector ◽  
Structured Interviews ◽  
Content Type ◽  
Green Business ◽  
Value Creation And Capture ◽  
The Uk

Purpose Sustainability has the potential to bring enormous benefits to our built environment. To release this potential, a change in business models is required. The purpose of this paper is to investigate green business models (GBMs) transformation by adopting five essential elements of green value creation and capture: green value proposition (GVP), target group (TG), key activities (KA), key resources (KR), and financial logic (FL). Design/methodology/approach In this qualitative study, 19 semi-structured interviews were conducted. Interviewees were selected purposively. The emergent data were analysed with the aid of themes. Findings It was observed that significant effort was being made towards enabling the transformation of certain elements pertinent to green value creation: KA and KR. This was particularly so when compared to other elements like GVP, TG, and FL. Practical implications Findings from this study should encourage construction managers to align their extant BMs to green activities hence enabling new approaches to green value creation and capture. Furthermore, the study will aid in improving the environmental and economic positions of the value chain within the construction sector. Originality/value This research is one of the few empirical academic works investigating GBMs in the construction sector.

scholarly journals Assessing the Mitigation Potential of Environmental Impacts From Circular Economy Strategies on an Industrial Sector and Its Value Chain: A Case Study on the Steel Value Chain in Quebec

2021 ◽  
Vol 2 ◽  
Author(s):  
Flavien Binet ◽  
François Saunier ◽  
Manuele Margni
Keyword(s):  
Life Cycle ◽  
Environmental Impacts ◽  
Value Chain ◽  
Circular Economy ◽  
Steel Industry ◽  
Ghg Emissions ◽  
Industrial Sector ◽  
Mitigation Potential ◽  
Whole Life Cycle

This research project aims to evaluate the potential reduction of environmental impacts from circular economy strategies on an industrial sector at a regional scale with a case study on Greenhouse Gas (GHG) emissions in Quebec's steel industry and its value chain. To do so, an integrated model has been created based on the matrix approach, building on material flow analysis (MFA) tracking flows and stocks and on life cycle assessment (LCA) to compute direct (from the activity, e.g., combustion process) and indirect (from the supply chain, e.g., production of raw material inside or outside of region) emissions. This theoretical model is designed to be applied to any emissions or environmental impacts from a specific sector in a given region and enable to model the effects of circularity strategies to both flows and related environmental impacts. The overall mitigation potential of individual or combined circular economy strategies on a specific sector could thus be evaluated across its entire value chain. In the case study, a set of the most promising circular strategies applicable in the Quebec context were identified, and the GHG reduction potential within and outside the province is calculated and compared with actual emissions. Six circular strategies were analyzed acting at three different levers, namely, GHG/material (increase iron recycling rate, switch to hydrogen-based reduction production), material/product (reduce weight of vehicle, limit over-specification in building construction), and product/service (increase buildings and cars lifetime, increase car-sharing), and therefore impact rather direct or indirect emissions on different stages of the steel life cycle. Combining these six strategies into a consolidated scenario shows that a circular-driven economy allows to cut down GHG emissions of the cradle-to-gate steel industry value chain by −55%, i.e., 1.67 Mt CO2e. Taking into account use phase of steel, overall reductions are estimated at −6.03 Mt CO2e, i.e., −30% of the whole life cycle.

scholarly journals Decarbonization and Circular Economy in the Sustainable Development and Renovation of Buildings and Neighbourhoods

2020 ◽  
Vol 12 (19) ◽  
pp. 7914 ◽  
Author(s):  
Pilar Mercader-Moyano ◽  
Paula M. Esquivias
Keyword(s):  
Circular Economy ◽  
Construction Materials ◽  
Sustainable Urban Development ◽  
Construction Sector ◽  
Building Sector ◽  
Building Stock ◽  
The Sustainable Development ◽  
Greenhouse Emissions ◽  
Efficient Construction ◽  
Whole Life Cycle

In recent years, the building sector has been turning towards intervening in the existing city building stock. In fact, it is generally accepted that the refurbishment of buildings and the urban regeneration based on sustainability must form the axis of reformulation of the building sector. Nowadays, achieving sustainable urban development inevitably involves improving existing buildings, thereby preventing the need for city growth, and for the emptying of established neighbourhoods. Furthermore, considering the whole life cycle, it is well known the great amount of greenhouse emissions derived from the construction sector, so in order to reach a decarbonized society it is important to provide eco-efficient construction materials and solutions, adding the principles of circular economy and resource efficiency. The articles of this special issue show different aspects to be considered in order to reach a decarbonized and circular building stock.

scholarly journals Circular Economy: Challenges and Opportunities in the Construction Sector of Kazakhstan

Buildings ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 501
Author(s):  
Beibut Torgautov ◽  
Asset Zhanabayev ◽  
Aidana Tleuken ◽  
Ali Turkyilmaz ◽  
Mohammad Mustafa ◽  
...  
Keyword(s):  
Circular Economy ◽  
Construction Materials ◽  
Future Research ◽  
Policy Recommendations ◽  
Construction Sector ◽  
Challenges And Opportunities ◽  
Local Construction ◽  
Barriers And Opportunities ◽  
Feasible Solutions ◽  
Common Barriers

The circular economy in the construction sector in emerging economies is one of the most promising concepts that aims to keep the value of the construction materials and structures as long as possible. The construction industry is rapidly developing in Kazakhstan with a yearly increase in projects. This research paper investigates the construction sector in Kazakhstan in terms of the potential application of circular economy principles by local stakeholders—clients, contractors, designers, and manufacturers. As limited research has been conducted on the circularity within the construction environment, including construction parties, this paper aims to fill this research gap. It seeks to identify the construction trends and perform a barrier and opportunity analysis to develop circular economy principles in the construction sector. As a research method, PEST is used for the study of local construction trends. At the same time, stakeholders are interviewed using semi-structured surveys organized according to the ReSOLVE framework (regenerate, share, optimize, loop, virtualize, and exchange) to identify the barriers and opportunities for circular economy in the construction sector. As an outcome of this study, the most common barriers and opportunities were associated with the economic benefit factor, as this was the main motivation for the stakeholders to save construction materials for reuse or to refuse more eco-friendly technologies. Additionally, policy recommendations for companies involved in the construction ecosystem were provided according to the assessment of found barriers and opportunities in the context of the ReSOLVE framework. This analysis has shown that for most stakeholders of the Kazakhstani construction sector, virtualization is of the highest priority; therefore, opportunities for its development are recommended. Future research could focus on the development of economically feasible solutions for the circular economy in construction with the inclusion of virtualization technologies.

Implementation of circular economy principles during pre-construction stage: the case of Sri Lanka

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Amodith Supunmal Wijewansha ◽  
G.A. Tennakoon ◽  
K.G.A.S. Waidyasekara ◽  
B.J. Ekanayake
Keyword(s):  
Sri Lanka ◽  
Environmental Sustainability ◽  
Circular Economy ◽  
Construction Projects ◽  
Well Being ◽  
Sri Lankan ◽  
Construction Sector ◽  
Structured Interviews ◽  
Construction Stage ◽  
Content Type

PurposeDespite the positive impacts of the construction sector on enhancing economic growth and ensuring societal well-being, its negative impacts on the environment from unsustainable resource consumption levels, emission of greenhouse gases (GHGs) and waste generation is monumental. Circular economy (CE) concept is identified globally as an avenue to address problems regarding adverse impacts of construction on the environment. This paper presents the principles of CE as an avenue for enhancing environmental sustainability during the pre-construction stage within Sri Lankan construction projects.Design/methodology/approachThis research was approached through a qualitative research method. Data were collected through semi-structured interviews with subject matter experts. The number of experts were limited due to lack of experts with knowledge on the subject area in Sri Lanka. Data were analysed using content analysis.FindingsFindings revealed a range of activities under each R principle of CE, that is, reduce, reuse, recycle, redesign, reclassification and renewability that could be implemented during the pre-construction stage, thereby providing a guide for construction professionals in implementing CE at the pre-construction stage. The need to expand knowledge on CE concepts within the Sri Lankan construction sector was recognized.Originality/valueThis study provides a qualitative in-depth perspective on how 6R principles of CE could be integrated to a construction project during the pre-construction stage. By adopting the proposed activities under CE principles, construction professionals can enhance the environmental sustainability of construction projects.

Materials passport's review: challenges and opportunities toward a circular economy building sector

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mayara Regina Munaro ◽  
Sergio Fernando Tavares
Keyword(s):  
Life Cycle ◽  
Value Chain ◽  
Circular Economy ◽  
Building Materials ◽  
Economic Benefits ◽  
Construction Sector ◽  
Knowledge Domain ◽  
Content Type ◽  
Digital Platforms ◽  
Challenges And Opportunities

PurposeReuse and recycling building materials depend on an efficient set of information and tracking, which can be obtained by the materials passport (MP) tool. Although MP introduces principles of circular economy (CE) and brings environmental, social and economic benefits, it is little-explored in the construction sector. The purpose of this study is to explore the adoption of the MP in the sector to raise awareness about this tool. This analysis leads to the conception of a model and identifies the main challenges and opportunities to increase MP implementation in the sector.Design/methodology/approachThrough a systematic literature review, based on the descriptive and thematic analysis, articles were selected, and analyzed to (1) review the MP state-of-the-art in the construction sector; (2) propose a materials passport model and (3) list the main challenges and opportunities to MP adoption.FindingsThe studies about MP were concentrated on strategies to implement general concepts and business opportunities. The MP model was proposed to overcome the lack of studies and understanding showed in the review. The model aimed to improve the recovery and reuse of materials across a building's life cycle. Challenges and opportunities were raised to direct decision-makers and support the development of this tool. A systematic regulation in the construction value chain and policy systems is crucial for creating digital platforms for data management of buildings' material.Originality/valueThis study developed an MP model to enable the management of building materials at different stages of the building's life cycle and contributes to future developments of the studies on this knowledge domain.

scholarly journals Policies as Drivers for Circular Economy in the Construction Sector in the Nordics

2021 ◽  
Vol 13 (16) ◽  
pp. 9350
Author(s):  
Malin zu Castell-Rüdenhausen ◽  
Margareta Wahlström ◽  
Thilde Fruergaard Astrup ◽  
Carl Jensen ◽  
Anke Oberender ◽  
...  
Keyword(s):  
Literature Review ◽  
Value Chain ◽  
Circular Economy ◽  
Business Models ◽  
Public Procurement ◽  
Construction Sector ◽  
Policy Frameworks ◽  
Key Concepts ◽  
Business Opportunities ◽  
Different Levels

A circular economy (CE) represents the key alternative to the linear ‘take-make-consume-dispose’ economic model, that still predominates in the construction sector. This study investigates how policies support CE-focused businesses in the construction sector in the Nordics. A literature review, the creation of a database, a review of Nordic actors with a CE focus, and targeted interviews with actors across the value chain of the construction sector in Denmark, Finland, Norway, and Sweden enabled us to benchmark the CE policy landscape and assess how CE policies at different levels support CE business models in the construction sector. The results show that the construction sector is well represented in the CE policy frameworks and that many business opportunities are created when national and local policies are put into practice. The implementation of policies is mainly done via three key concepts, i.e., planning, requirements for sustainable constructions, and requirements for public procurement. It can be concluded that policies are drivers for the implementation of a CE and support CE business models in the Nordics.

scholarly journals Circular economy in the construction sector: advancing environmental performance through systemic and holistic thinking

2021 ◽  
Author(s):  
Magnus Sparrevik ◽  
Luitzen de Boer ◽  
Ottar Michelsen ◽  
Christofer Skaar ◽  
Haley Knudson ◽  
...  
Keyword(s):  
Life Cycle ◽  
Circular Economy ◽  
Building Materials ◽  
Construction Sector ◽  
Recursive Structure ◽  
Effective Implementation ◽  
Environmental Effectiveness ◽  
Standards And Regulations ◽  
Management Schemes ◽  
Different Levels

AbstractThe construction sector is progressively becoming more circular by reducing waste, re-using building materials and adopting regenerative solutions for energy production and biodiversity protection. The implications of circularity on construction activities are complex and require the careful evaluation of impacts to select the appropriate path forward. Evaluations of circular solutions and their environmental effectiveness are often performed based on various types of life cycle-based impact assessments. This paper uses systemic thinking to map and evaluate different impact assessment methodologies and their implications for a shift to more circular solutions. The following systemic levels are used to group the methodologies: product (material life cycle declarations and building assessments), organisation (certification and management schemes) and system (policies, standards and regulations). The results confirm that circular economy is integrated at all levels. However, development and structure are not coordinated or governed unidirectionally, but rather occur simultaneously at different levels. This recursive structure is positive if the methods are applied in the correct context, thus providing both autonomy and cohesion in decision making. Methods at lower systemic levels may then improve production processes and stimulate the market to create circular and innovative building solutions, whereas methods at higher systemic levels can be used, for example, by real estate builders, trade organisations and governments to create incentives for circular development and innovation in a broader perspective. Use of the performance methods correctly within an actor network is therefore crucial for successful and effective implementation of circular economy in the construction sector.

scholarly journals Life Cycle GHG Emissions of Residential Buildings in Humid Subtropical and Tropical Climates: Systematic Review and Analysis

Buildings ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 6
Author(s):  
Daniel Satola ◽  
Martin Röck ◽  
Aoife Houlihan-Wiberg ◽  
Arild Gustavsen
Keyword(s):  
Systematic Review ◽  
Life Cycle ◽  
Residential Buildings ◽  
Construction Materials ◽  
Ghg Emissions ◽  
Energy Performance ◽  
Cycle Performance ◽  
Tropical Climates ◽  
Building Life Cycle ◽  
Total Life

Improving the environmental life cycle performance of buildings by focusing on the reduction of greenhouse gas (GHG) emissions along the building life cycle is considered a crucial step in achieving global climate targets. This paper provides a systematic review and analysis of 75 residential case studies in humid subtropical and tropical climates. The study investigates GHG emissions across the building life cycle, i.e., it analyses both embodied and operational GHG emissions. Furthermore, the influence of various parameters, such as building location, typology, construction materials and energy performance, as well as methodological aspects are investigated. Through comparative analysis, the study identifies promising design strategies for reducing life cycle-related GHG emissions of buildings operating in subtropical and tropical climate zones. The results show that life cycle GHG emissions in the analysed studies are mostly dominated by operational emissions and are the highest for energy-intensive multi-family buildings. Buildings following low or net-zero energy performance targets show potential reductions of 50–80% for total life cycle GHG emissions, compared to buildings with conventional energy performance. Implementation of on-site photovoltaic (PV) systems provides the highest reduction potential for both operational and total life cycle GHG emissions, with potential reductions of 92% to 100% and 48% to 66%, respectively. Strategies related to increased use of timber and other bio-based materials present the highest potential for reduction of embodied GHG emissions, with reductions of 9% to 73%.

scholarly journals Making Resilient Decisions for Sustainable Circularity of Fashion

2021 ◽  
Author(s):  
Celinda Palm ◽  
Sarah E. Cornell ◽  
Tiina Häyhä
Keyword(s):  
Value Chain ◽  
Circular Economy ◽  
Ecological Impacts ◽  
Ecological System ◽  
Fashion Industry ◽  
State Response ◽  
Social Ecological ◽  
Industry Value Chain ◽  
The Many ◽  
Sustainability Challenges

AbstractThe fashion and textiles industry, and policymakers at all levels, are showing an increased interest in the concept of circular economy as a way to decrease business risks and negative environmental impacts. However, focus is placed mainly on the material ‘stuff’ of textile fashion and its biophysical harms. The current material focus has several shortcomings, because fashion is a social-ecological system and cannot be understood merely by addressing its environmental dimensions. In this paper, we rethink the fashion system from a critical social-ecological perspective. The driver-state-response framework shows social drivers and ecological impacts as an adaptive social-ecological system, exposing how these interacting aspects need to be addressed for sustainable and resilient implementation of circular economy. We show how current responses to global sustainability challenges have so far fallen short. Our overall aim is to expand possibilities for reframing responses that better reflect the complex links between the global fashion system, culture and creativity and the dynamics of the living planet. We argue that reducing planetary pressure from the global fashion and textiles industry requires greater recognition of the system’s social drivers with more emphasis on the many cross-scale links between social and ecological dimensions. Resilient decisions aiming for sustainable circularity of the fashion industry must therefore pay attention to social activities beyond the industry value chain, not just material flows within it.

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