Encouraging the environmentally sound management of C&amp;D waste in China: An integrative review and research agenda

Duan, Huabo; Wang, Jiayuan; Huang, Qifei

doi:10.1016/j.rser.2014.11.069

Cited by 138 publications

(45 citation statements)

References 29 publications

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“…This discrepancy between outflow and inflow indicates that closing the loop for construction materials based on the urban mine alone seems highly unrealistic before the year 2050. Especially given the fact that only a fraction of the secondary materials could actually be re-used (Nautiyal et al, 2015;Duan et al, 2015;Martínez-Rocamora et al, 2016).…”

Section: Materials Calculations (Inflow-outflow)mentioning

confidence: 99%

Modelling global material stocks and flows for residential and service sector buildings towards 2050

Deetman

Marinova

Voet

et al. 2020

Journal of Cleaner Production

133

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Residential buildings and service sector buildings have an important contribution to climate change, directly via energy use in these buildings and indirectly through construction activities and the production and disposal of buildings materials. In this paper, we introduce a model that looks at total global building stock for 26 regions between 1970 and 2050 and calculates the floor space and building materials both in new buildings and in demolished buildings. For residential buildings, we build upon the work of Marinova et al. (2019, this issue), who used a building material database to come up with scenarios for materials in the residential building stock. This paper adds two things. First, we introduce a new regression-based model for service building floor space, recognizing 4 different types of servicerelated buildings. Secondly, we use a dynamic stock model, based on lifetime distributions found in literature, to calculate the construction (inflow) and demolition (outflow) of building floor space for both residential and service-related purposes. We combine this with data from the building material database to come up with scenarios for the annual demand for construction materials worldwide as well as an estimation of the availability of waste materials after building demolition towards 2050. The model can thus be used to assess the potential for closing the material cycles in the construction sector, while distinguishing urban and rural areas explicitly. The results show that demand for construction materials will continue to increase in most regions, even in developed countries. Global demand for steel and cement for the building sector is estimated to be 769 Mt/yr and 11.9 Gt/yr respectively, by the end of the modelling period. This represents a respective growth of 31% and 14% compared to today. Drivers behind this are an expected growth of global residential building stock of about 50%, and a growth of about 150% in the building stock for services. Our model projects that by 2050, only 55% of construction-related demand for copper, wood and steel could potentially be covered by recycled building materials. For other materials the availability of scrap may be higher, reaching up to 71% of new demand in the case of aluminium. This means that in most regions urban mining cannot cover the growing demand for construction materials.

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Section: Materials Calculations (Inflow-outflow)mentioning

confidence: 99%

Modelling global material stocks and flows for residential and service sector buildings towards 2050

Deetman

Marinova

Voet

et al. 2020

Journal of Cleaner Production

133

View full text Add to dashboard Cite

show abstract

“…The table also highlights the importance of sorting during collection to deliver quality products: the frequency of production of recycled materials (aggregate for concrete, sand, gravel, natural opengraded aggregate) for applications subject to strict requirements was highest with clean C&DW, followed by mixed and dirty waste, in that order. The rate of production of higher quality recycled materials could be raised by improving the technology presently in place in management facilities (Duan et al, 2015), with the introduction of near-infrared sorting for mixed waste, for instance (Vegas et al, 2015).…”

Section: Products Manufactured From Canddwmentioning

confidence: 99%

Construction and demolition waste applications and maximum daily output in Spanish recycling plants

et al. 2020

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The pursuit of construction sustainability has driven the use of partially or wholly waste-based eco-materials. New applications are being sought for recycled aggregate (RA) to further the use of this material and ensure the survival of the construction and demolition waste (C&DW) industry. RA, currently used in the construction of pavements, fills and embankments and only incipiently to manufacture structural or non-structural concrete, is a mere 8.99% of the total aggregate extracted in EU countries where RA is produced. Against this backdrop, the utility of this study lies in the overview afforded of RA typology, the application of the product in bound or unbound materials, the pursuit of new applications, structural or otherwise, and the assessment of daily maximum output by C&DW recycling facilities in Spain. The findings show that irrespective of its origin, RA most commonly adopts the form of wet mix macadam, gravel or sand used primarily in unbound applications with only dubious quality standards. Plant managers contend that RA from clean waste can feasibly be used in bound applications that require higher-performance materials. Maximum daily output varies widely, with capacity under 200 t d-1 in 30% of the plants. One of the conclusions drawn is that the current business model is in need of revision, with an emphasis on aggregate quality control (certification) and the adoption of technology for separating out impurities, pollutants and undesirable materials to improve the quality of RA.

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“…According to report, Beijing's C&D waste discharge amount in 2015 has reached 29.6 million tons, generating about 81,200 tons on average a day. Large quantities of continuously produced C&D waste have become a social issue, which pollutes the environment and bothers Beijing citizens as well [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

AHP comparative analysis of construction and demolitio (C&D) waste recycling scenarios: The case of Beijing

et al. 2019

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As construction waste production in Beijing has increased significantly, there is an urgent demand to manage and dispose it in a more economical and environmentally-friendly way. As there are different benefits and limits between preliminary sorting/recycling on construction sites and centralized treatment on final disposal sites, three scenarios were formed. AHP was used to compare these scenarios from the aspect of technical feasibility, economic costs and environmental effects. AHP analysis results showed that the priority of three scenarios followed D3>D1>D2, indicating the optimal way for C&D waste in Chaoyang district is firstly going through primary recycling with a mobile treatment facility on the construction site and then transporting to a final disposal site.

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Encouraging the environmentally sound management of C&D waste in China: An integrative review and research agenda

Cited by 138 publications

References 29 publications

Modelling global material stocks and flows for residential and service sector buildings towards 2050

Modelling global material stocks and flows for residential and service sector buildings towards 2050

Construction and demolition waste applications and maximum daily output in Spanish recycling plants

AHP comparative analysis of construction and demolitio (C&D) waste recycling scenarios: The case of Beijing

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