Circular Economy Construction Research Articles

Developing a Decision-Making Support System for a Smart Construction and Demolition Waste Transition to a Circular Economy

This research work aimed to develop a decision support system (DSS) to select the most appropriate concrete waste management method, which is the most critical issue in the construction industry. The research process began with the study of the current situation of concrete waste management problems. Related theories and literature were reviewed, and experts were interviewed in depth. After that, the Delphi technique and the fuzzy analytic hierarchy process (FAHP) were used to analyze the decision-making structure and consider factors related to the waste management methods. Then, the FAHP process was analyzed, calculated, and prioritized using MS Excel until the results were obtained. Finally, decision structures were shown, evaluated, and prioritized using a case study by a group of experts belonging to the Thai circular economy construction industry (CECI). The contribution of this research line in the DSS model is by analyzing, calculating, and finding the most appropriate alternative solution for the construction waste industry. Limitations, recommendations, and future research directions are also presented.

Upscaling bio-based construction: challenges and opportunities

ABSTRACT Construction projects using emerging bio-based materials have been realized over the past ten to fifteen years within Europe. Bio-based buildings utilize properties of natural materials to regulate internal environments, particularly fluctuations in temperature and relative humidity. Despite individual exemplar projects demonstrating functional performance and long-term operational cost savings, there hasn’t been a proliferation of commercial or domestic bio-based projects. With a growing shift towards circular economy construction, bio-based buildings could be readily adopted to meet this development. This study evaluates barriers faced by bio-based materials, making the upscaling of production and a breakthrough into mainstream construction challenging. Evaluation was achieved through senior professionals with experience in bio-based construction participating in semi-structured interviews based on core categories of finance, knowledge, and policy. Challenges include the upscaling of production by manufacturers of emerging materials, inconsistencies in life cycle assessment, material certification and accreditation, vested interests in the construction industry, and concerns regarding initial costs, availability, and knowledge of products. Potential solutions for upscaling bio-based construction are identified and include increased case studies, positive legislation, regional economic regeneration, the wellness agenda, long-term economic sustainability, and engagement with established construction companies. This insight has informed the procurement process, material evaluation, and adoption of policy.

Socio-technical imaginaries of a circular economy in governmental discourse and among science, technology, and innovation actors: A Norwegian case study

A growing body of research is investigating the connections between the discursive construction of circular economy (CE) and its influences on public policies that promote the socio-technological transition towards circular production and consumption systems. However, surprisingly little attention has focused on how CE discourses interact with science, technology, and innovation (ST&I) actors. To address this gap, this research adopts the prism of socio-technical imaginaries to understand specific visions of circularity in science and innovation, exploring how competing imaginaries mobilize specific actors, institutions, and visions of a greener future. Our empirical material included archival documentation from the Norwegian government and funded research projects on CE. Our analysis identified two key tension points within these imaginaries: “International drivers versus regional and local transition arenas” and “Ecological modernization versus sectoral transformation.” We suggest that tensions are inherent in CE socio-technical imaginaries but are often silenced or minimized by institutional discourses on circularity. Our findings suggest that official CE policy programs tend to minimize or overtly ignore criticisms and contestation that are increasingly raised in academic circles. Our findings indicate the need for increased involvement of ST&I actors and other societal actors (such as NGOs and the private sector) in the CE policymaking process to avoid endless growth as an unexpected CE policy outcome.

Public transportation development decision-making under public participation: A large-scale group decision-making method based on fuzzy preference relations

As an intensive travel mode, public transportation is an essential part of a circular economy construction. Scientific decision-making in a PT development plan is a fundamental prerequisite for ensuring its prioritization. In this study, based on the large-scale group decision-making of fuzzy preference relations, we examine PT development decision-making under public participation, to promote the effective use of PT resources. First, we cluster participants in the decision-making process based on the similarity method. Second, based on the clustering, an induced orderly weighting method is used to analyze the decision-making preferences of each sub-group. Finally, the decision-making preferences of each group are prioritized according to an analysis of group heterogeneity. We found that based on the similarity clustering method, when the threshold was set to 0.68, 85 participants were divided into 4 groups, and the demographic characteristics of the sub-groups presented some agglomeration. The four groups paid little attention to improving the quality of PT services. Moreover, the work unit had a significant impact on the decision-making preferences of participants, and public officials paid more attention to society and the government. Group heterogeneity significantly affects decision-making preferences and alternative priorities.

Archetypical CBMs in Construction and a Translation to Industrialized Manufacture

The circular economy is a widely accepted concept that various governments have started to adopt. Still, a major consumer of resources, the construction industry, struggles to implement business models that answer to the opportunity and generate value beyond economical. At the same time, the industry is at a threshold of intensifying their production by industrialized manufacture. This type of construction offers practical benefits and should be developed whilst prioritizing a sustainably built environment. A circular economy business model (CBM) offers all stakeholders long term value and revenue whilst moving towards a sustainable environment. The business model canvas (BMC) is a tool to shed light on the essential characteristics of a CBM, its value, and alignment in a multi-life cycle perspective. It can contribute to accelerating circular innovation in construction. This study aims to provide an overview of archetypical CBMs in construction based on a literature review and a systematic coding exercise using the BMC. The archetypes found are used to describe the characteristics of industrialized manufacture in the various circular economy construction scenarios.

Contingencies of Circular Economy: Discourse Hegemony and Institutionalization in Norway

Recent research points out serious weaknesses in the current academic discourses of circular economy, among others the lack of understanding of the politics behind a transition towards circularity. In this paper we thus inquiry: What contingencies does the Circular Economy in Norway discourse carries as part of the discourse structuration and institutionalization? Norway is an extreme case to tackle this question given a state lead initiative to promote circular economy, and the country’s well-known international role in promoting greening discourses. We found two tension points in the current discourse on circular economy: i) International drivers versus regional and local transition arenas and ii) Clearly marked eco-modernization promotion as policy priority versus sectoral transformation. These findings indicate the need for civil society actors to unleash indirect power in order to problematize circular economy through a more radical discourse structuration. Our findings thus contribute with a better understanding of the power dynamics behind the discourse construction of circular economy, and choices made to the technologies and sectors benefiting of the current discourse. Similarly, we call for further phronetic social science perspectives in the study of circular economy. Our results contribute to the academic debate on questions such as where are we going with the circular economy? Who gains and who loses with the circular economy? Is this development of the circular economy desirable? And what should we do about it?

Study on Construction and Application of Circular Economy Evaluation Index System in Petrochemical Industry

Petrochemical industry is the focus of circular economy construction, circular economy evaluation index system is an important task.This article briefly introduced the circular economy and circular economy evaluation system, clarified the construction of chemical enterprises circular economy evaluation system principles.Using analytic hierarchy process, given the weight of the index system.The article selects 24 quantitative indicators from the aspects of resource utilization, resource recycling and waste disposal and disposal, and objectively, accurately and effectively determines the weight of indicators,and evaluate and analyze the development of circular economy in petrochemical industry from 2014 to 2017 in our country.

Evaluation of Urban circular economy development: An empirical research of 40 cities in China

Abstract The city is an important component in the construction of circular economy (CE), and after years of development, assessment of urban CE and calculation of an urban circular development index (UCDI) is an important task that the Chinese government has faced. However, existing research into the indicator system and evaluation methods is not enough to support calculation and subsequent publishing of UCDI. Building off current research into CE, its index systems and its evaluation, this paper puts forward an evaluation index system for urban CE development (UCDI) that uses an improved entropy methodology combining expert and entropy weightings. The index was calculated for 40 cities that were part of China's pilot CE cities program for alternating years in the five year period between 2012 and 2016 (that is, the index was calculated for 2012, 2014 and 2016). The study found that the level of urban CE increased significantly over the five year period, with that in the CE pilot cities growing at a faster rate than the national average. Results show that a certain relationship exists between UCDI, urban types and economic development, but has little relationship with industrial structure. Finally, recommendations for the promotion of urban CE are proposed.

Approaches and policies for promoting industrial park recycling transformation (IPRT) in China: Practices and lessons

Industrial park recycling transformation (IPRT) was one of the major circular economy construction demonstration programs in the 12th Five-Year Plan issued by the China State Council in 2012. It comprised of 7 major tasks to transform traditionally high resource and energy intensive production into high efficiency and low pollutant production. By 2017, 129 industrial parks had been approved for IPRT by the National Development and Reform Commission (NDRC). This paper presents a thorough review on IPRT content, policies, and practices, with some lessons and suggestions for further development. Six types of projects were supported by national funds, which included industrial chain extension and complementary projects; water conversion and recycling projects; energy saving projects; pollution prevention projects; platform construction projects; and infrastructure construction sharing projects. Case studies show success for each case. However, deficiencies in industrial development, management, policy-making, and information sharing also emerged. Two suggestions were put forward. First, investment should be diverted from traditional industries to new industries. Past cases have shown that traditional industries have a greater risk of obsolescence. Failure in one park has already created a cascading effect on other enterprises in the park. Secondly, the government-led model should be transformed into a government and market co-led model. The government could establish more effective incentive and restraint mechanisms to attract participation from enterprises and/or social capital. Information sharing platforms, for example, benefit enterprises by increasing awareness for circular economy projects to both private and public actors.

The Construction and Planning of Multi-Project Management System

The contradiction between economic development and resource environment has become increasingly acute with the continuous societal and industrial development. The implementation of waste and renewable resource recycling can alleviate the conflict. The multi-project management theory was applied to the construction of an industrial park based on the characteristics of the circular economy theory. In this paper, the basic definition of circular economy and industrial parks was expounded, and the application of circular economy in the planning of parks was studied from five major aspects. From industrial selection, property function and volume allocation planning, industrial park planning and design were studied. Starting from the function structure of the park, the setting of the slag yard outside the park, the green land and the landscape, the road planning of the park, the planning of industrial parks of chemical recycling economy in Gansu was studied. Through empirical analysis, theoretical support and model reference were provided for the construction of circular economy in other industrial parks.

FE validation of push‐out tests

AbstractThe prefabrication of concrete slabs reduces construction time and the total life cycle cost of composite steel‐concrete buildings and bridge decks. Using bolts as shear connectors embedded in prefabricated concrete slabs enables reuse and easy replacement of slabs as structural members suitable for a circular economy construction concept. The results of static push‐out experiments on M16 and M24 bolts, grade 8.8, are shown here. The focus is on the validation of advanced finite element (FE) modelling by experiments. Damage material models for bolt and concrete slab were used and the most realistic preloading of the bolts modelled with threads was achieved by turning the nut in the FE model. An explicit dynamic solver with mass scaling function was used for quasi‐static analysis including fracture. Two failure modes obtained in experiments – bolt shear and concrete crushing – were realistically modelled by the FEA, which shows that the model is suitable for a parametric study leading to theoretical models of failure modes and slip capacity of the shear connection. Results indicate that the bolts with nuts on both sides of the steel flange can be successfully used as demountable shear connectors.

The Construction of Early-warning Index System in Regional Circular Economy of China

In this paper, the model of early warning system for circular economy development system was studied, the early-warning system for circular economy provides a quantitative model to support the pollution control. Specifically, this paper built an early warning index system of regional circular economy, and put forward the measure model for the development of circular economy. In addition, this paper constructed prediction model of the circulation economy development. Finally, by the proposed early warning model, this paper analysed the circular economy of Henan province and targeted policy suggestions were put forward for the construction of circular economy of Henan province.

农工共生型生态产业园的构建－以郑州经开区为例

PDF HTML阅读 XML下载 导出引用 引用提醒 农工共生型生态产业园的构建——以郑州经开区为例 DOI: 10.5846/stxb201311242804 作者: 作者单位: 中国科学院生态环境研究中心,中国科学院生态环境研究中心,中国科学院生态环境研究中心,中国科学院生态环境研究中心 作者简介: 通讯作者: 中图分类号: 基金项目: 国家自然科学基金面上项目(71173209); 国家自然科学基金重点项目(71033005) The design of agri-industrial ecological park:a case study of Zhengzhou national economic-technological development area Author: Affiliation: State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,100085,State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,, Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:生态产业园已成为我国循环经济建设和可持续发展的重要载体之一,但我国的生态产业园明显存在着产业结构趋同、区域特色不鲜明等问题。提出了农工共生型生态产业园的概念,这是一类以工业园区为核心,集园区周边各类型农业相关企业、合作组织、农民、乡镇及农田为一体的一种"社会-经济-自然"复合区域产业共生体系。农工共生型生态产业园可以实现核心园区与周边腹地的协同发展,可以提升区域整体的生态效率。给出了农工共生型生态产业园的发展模式、建设意义及设计原则。并以农业大省河南省中唯一的国家级经济技术开发区为研究案例,结合当地区域特色及资源优势,构建了由3条产品链及一条服务链所组成的农工共生型产业生态系统。农工共生型生态产业园是产业共生理论在区域层面的具体实现,是复合生态系统理论在产业园层次的创新性应用。 Abstract:Along with the rapid process of industrialization and urbanization, the economic development of China was constrained by both increasingly scarce resources and contaminated environment. Eco-industrial park (EIP), as a significant practice of industrial ecology, has become one of the important carriers in China's construction of circular economy and sustainable development. However, the traditional development chain of eco-industrial parks is so single that less attention is paid on agriculture, industry and services to seek a more extensive cooperation mechanisms, leading to the problems of a unclear and indistinct regional feature in current development tendency of eco-industrial parks. Therefore, the construction framework of agri-industrial ecological park (agri-industrial EIP) are proposed in this paper,including conception,development model, construction significance and principles of design. The conception of agri-industrial EIPs is defined as follows: agri-industrial EIPs are regional industrial symbiosis which are based on the core of industrial parks and composed of "social-economic-nature" complex involving the various types of agriculture-related enterprises, cooperative organizations,farmers, villages and farmland around the park. Then,according to the enterprise scale and scope of radiation area, it can be divided into three levels: (1) small level involving enterprise combined with farmers, (2) meso-level involving core parks combined with hinterland, (3) regional level involving. Meanwhile, the construction of agri-industrial EIPs can benefit in comprehensive utilization of resources in the surroundings and the logistics cost savings, competitive advantage of industrial symbiosis network will also be improved, the goal of "industry promotes agriculture, production promotes environmental protection" will be achieved. In the view of system optimization method, the paper has put forward five principles for designing agri-industrial EIPs: transverse coupling, longitudinal closing, regional combination, functional orientation and employment increasing. Based on these conceptions and design principles, we take national economic-technological development area (NETDA) in Zhengzhou as a case study, which is the only state-level industrial parks in Henan province which is famous for the largest production of agricultural and sideline products in central regions, convenient transportation network and rich land resources. Combined with regional characteristics and resource advantages, NETDA was constructed as agri-industrial symbiotic industrial ecosystem by three product lines and a service chain,which are as follows:1) the first product chain, which focuses on the products of small or medium-sized and low-emission vehicles provided for farmers on back-land of the agri-industrial EIPs,2) the second product chain, in order to meet the demand of agricultural mechanization, which focuses on agricultural machinery provided by enterprises of equipment manufacturing in the park for the need of rural production in the surrounding hinterland, 3) the third product chain, which focuses on agricultural products produced in hinterland to strengthen the connection between food processing enterprises in the park with the rural in hinterland through the way of "order agriculture",4) service chain, with the purpose of meeting technology and information demand for the rapid development of agriculture, which focus on technical guidance and information services provided for agricultural development in hinterland, rural residential environment construction, rural employment by the agricultural headquarters in agri-industrial EIPs.In conclusion, the construction of agri-industrial EIPs is not only the specific implementation of theory in the industrial symbiosis at the regional level, but also is an innovative application of compound ecosystem theory in the level of industrial parks. 参考文献 相似文献 引证文献

Study on Corporate Environmental Performance Evaluation Based on Circular Economy

The enterprise is the main body of the market economy, impact of business activities on the environment is multifaceted, the effective management of the environmental performance of enterprises is the basis of circular economy construction, social sustainable development implementation. This article is based on theory of circular economy and sustainable development, analysis of existing problems and shortcomings of enterprise performance evaluation, combined with China's reality, discusses the value orientation of corporate environmental performance management and performance evaluation of the target under the Circular Economy , research building enterprise environmental performance evaluation system, in order to provide reference for decision-making and practice of enterprises.

The Green Supply Chain Management: A Perspective on Circular Economy

Circular economy is a kind of economic growth pattern that utilizes resource circularly with low consumption, low emission and high efficiency. Upon the basis of circular economy theory to study the construction of green supply chain, with applied case study method, it reached the conclusions that: 1) The circular economys development is a staged process, it needs to plan at industry level; 2) Circular economy involves the whole industrial chain of production layout; and 3) Government can promote the green supply chain management and construction of circular economy through sharing resources and infrastructure.

Development Status of Hydrogen Energy and Application Prospects

The energy problem is the basis development of the material productive forces of human society, from the use of fuel and power resources, is focused and plays the highest combustion. Having entered the era of knowledge economy, economic development more like the teachings of the CPC Central Committee, on the basis of people-oriented, earnestly implement the scientific concept of development, adhere to the comprehensive, coordinated and sustainable development, and to adhere to the development and construction of circular economy. To maximize the potential of the understanding of material and the relationship between development and changes, firmly grasp the general direction, and strive to promote each other to make a greater contribution to the human society and the natural.

Study on Establishment and Application of Circular Economy Evaluation Index System for the Chemical Industry

The chemical industry is the focus of circular economy construction, and the construction of evaluation index system of circular economy is an important work. In this paper, a circular economy evaluation index system that may be used for quantized evaluation for the chemical industry is established based on the previous research results, where the weight value of the index system is obtained by the AHP method. The rationality of the evaluation index system is verified through the case studies.

Study on Green Supply Chain of Chinese TV Industry under Circular Economy

Under the background of considering ecological balance, environmental protection and energy saving, how to boost the sustainable development of enterprises has become the common problem that TV industry needs to solve urgently. Therefore, this article considers the necessity of implementing green supply chain development model in Chinese TV industry, and gives the framework under the thought of circular economy. It also deeply analyzes the circular economy construction of each part of the framework, and puts forward some countermeasures of implementing green supply chain management in Chinese TV industry.

Materials Flow Analysis on the System of Flue Gas Desulfurization and Denitration with Pyrolusite Slurry

Circular economy promotes the establishment of recycling-oriented society and recycling-based businesses. Circular economy is characterized by eco-efficiency improvement and materials recycle, furthermore, it also has provided a practical and feasible way for the sustainable development of human society. Materials flow analysis (MFA) has provided a new and simple way to study the development of circular economy. MFA is based on materials inputs and outputs, and then creates materials inputs and outputs account to manage materials flow. The process using pyrolusite for FGD produces manganese, high-purified manganese carbonates and slag used for cement production as byproducts. Electrolytic manganese production process, high-sulfur coal combustion process and cement production process are studied in the research. Materials flows of these processes are studied. The new production patterns are compared with the traditional ones basing on MFA. The results show that these processes are more environment-friendly and resource-saving in the comparison. To evaluate the circular economy efficiency of the complementary system, the evaluation index system of the circular economy construction is created.