Promoting effective construction and demolition waste management towards sustainable development: A case study of Hong Kong

2020 ◽  
Vol 28 (6) ◽  
pp. 1713-1724
Author(s):  
Zezhou Wu ◽  
Ann T.W. Yu ◽  
Chi Sun Poon
Keyword(s):  
Sustainable Development ◽  
Hong Kong ◽  
Waste Management ◽  
Construction And Demolition Waste ◽  
Demolition Waste

scholarly journals Waste Management of Emergency Construction Work. Case Study: 40 Dwellings in Seville (Spain)

2017 ◽  
Vol 11 (1) ◽  
pp. 110-123 ◽  
Author(s):  
Antonio Ferreira-Sánchez ◽  
Madelyn Marrero
Keyword(s):  
Waste Management ◽  
Residential Building ◽  
Waste Reduction ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Emergency Situations ◽  
Reduction Techniques ◽  
Number Of Factors ◽  
The Cost

Eco-efficient rehabilitation of buildings and neighbourhoods should include strategies to reduce the potential environmental impact of buildings under consideration for demolishment. In this case, good construction and demolition (C&D) waste management can represent a doubly eco-efficient approach: advantage is taken of much of the building and the volume of waste is reduced during construction and demolition work. Construction and demolition waste management in emergency situations is a subject yet to be studied in the construction sector. This kind of work, although not very common, involves major building damages and the need for punctual, partial or total demolitions. The amount of C&D waste can be a major problem to deal with, and its management during the critical first phases can determinate the progress of the rehabilitation. Conditioned by a greater number of factors than normal construction works, the lack of time for the identification, quantification, and evaluation of C&D waste renders this type of extremely useful study. In this work, from the case study of the emergency repair of a residential building of 40 dwellings in Seville (Spain) seriously affected by a soil displacement, Generated C&D waste are identified and the waste reduction techniques used are shown. These techniques contributed to achieve the planned objectives and to control in advance the cost. Finally, the most important data, C&D waste quantification and the managing cost are presented in order to serve as reference for similar circumstances in the future because there areno clear references to be used.

scholarly journals System Dynamic Analysis of Impacts of Government Charges on Disposal of Construction and Demolition Waste: A Hong Kong Case Study

2018 ◽  
Vol 10 (4) ◽  
pp. 1077 ◽  
Author(s):  
Lai Au ◽  
Seungjun Ahn ◽  
Tae Kim
Keyword(s):  
Hong Kong ◽  
Simulation Analysis ◽  
Construction And Demolition Waste ◽  
Clear Understanding ◽  
Environmental Implications ◽  
Demolition Waste ◽  
Illegal Dumping ◽  
The Government ◽  
Sd Model

With the purpose of reducing the amount of construction and demolition (C&D) waste disposed to landfills, many countries and municipalities have introduced increasingly stringent C&D waste disposal charges (CDWDC) but the level of CDWDC is often determined without a clear understanding of its broad and complex impacts. Against this background, this paper aims to propose a system dynamics (SD) model that can help predict CDWDC’s environmental implications as well as its financial implications. Specifically, the proposed model explains complex causal relationships between variables such as the level of CDWDC, the amount of C&D waste disposed to landfills, the government’s revenues from CDWDC as well as the costs of supplying and operating landfills over time. For a case study, the developed model is customized and calibrated with actual data from Hong Kong, where the remaining capacities of existing landfills are limited and the need for supplying more landfills is imminent. The simulation analysis with the model predicts that the current charging levels may not be high enough to effectively control the amount of C&D waste disposed to landfills or to compensate for the costs to the government of supplying additional landfills. The analysis also predicts how much illegal dumping may increase as the level of CDWDC increases. This case study illustrates that the proposed SD model can help policy makers to see the potential impacts of increased CDWDC on the amount of C&D waste disposed to landfills, government costs and the amount of illegal dumping of C&D waste; and can therefore help them to determine the most appropriate level of CDWDC.

scholarly journals Construction Waste Audit in the Framework of Sustainable Waste Management in Construction Projects - Case Study

2020 ◽  
Author(s):  
Marcela Spišáková ◽  
Peter Mésároš ◽  
Tomáš Mandičák
Keyword(s):  
Waste Management ◽  
Waste Disposal ◽  
Construction Projects ◽  
Economic Benefits ◽  
Construction And Demolition Waste ◽  
Transport Costs ◽  
Demolition Waste ◽  
Construction Waste ◽  
Building Information

The issue of sustainability has long been the subject of interest of the architecture engineering and construction sector. All three aspects of sustainability - economic, environmental and social - can be affected through appropriate construction waste management. Construction and demolition waste (CDW) is one of the largest worldwide waste streams, therefore it is given great attention by all stakeholders (investors, contractors, authorities, etc.). Researches have shown that one of the main barriers to insufficiency CDW recovery is inadequate policies and legal frameworks to manage CDW. It is also one of the EU's environmental priorities. Aim of the article is to confirm the economic potential of construction and demolition waste audit processing through case study. A pre-demolition waste audit has been processed for unused building of shopping center in the town Snina in Slovakia. Subsequently, a comparison of economic parameters (waste disposal costs and transport costs) of recommended CDW management was performed. This comparison confirmed the economic benefits of environmentally friendly construction waste management methods according to the waste audit results, which will also increase the sustainability of construction projects. In addition, the cost parameters of selected waste disposal methods could be another dimension of building information modelling.

Prioritizing the effective strategies for construction and demolition waste management using fuzzy IDOCRIW and WASPAS methods

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Maryam Eghbali-Zarch ◽  
Reza Tavakkoli-Moghaddam ◽  
Kazem Dehghan-Sanej ◽  
Amin Kaboli
Keyword(s):  
Decision Making ◽  
Sustainable Development ◽  
Waste Management ◽  
Social Life ◽  
Fuzzy Numbers ◽  
Model Performance ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Content Type ◽  
Effective Strategies

PurposeThe construction industry is a key driver of economic growth. However, the adverse impacts of construction and demolition waste (CDW) resulted from the active construction projects on the economy, environment, public health and social life necessitates an appropriate control and management of this waste stream. Developing and promoting the construction and demolition waste management (CDWM) hierarchy program at the strategic level is essential.Design/methodology/approachThis study aims to propose a hybrid decision model that hybridizes the Integrated Determination of Objective Criteria Weights (IDOCRIW) and weighted aggregated sum product assessment (WASPAS) under a fuzzy environment.FindingsThe proposed method ranks the potential strategic alternatives by the sustainable development criteria to improve the performance of CDWM. As indicated in the results, the fuzzy approach in the decision-making process enables the transformation of linguistic variables into fuzzy numbers that show uncertainty and ambiguity in real-world systems. Moreover, the close correlation between the final ranking of the proposed methodology and the average priority order of the strategic alternatives obtained by five different multi-criteria decision-making (MCDM) methods implies the validity of the model performance.Practical implicationsThis proposed model is an appropriate tool to effectively decide on the development of CDWM from a strategic point of view. It aims to establish an MCDM framework for the evaluation of effective strategies for CDWM according to the indices of sustainable development. Implementing proper operational plans and conducting research in CDWM has the highest priority, and enacting new and more stringent laws, rules and regulations against the production of CDW has secondary priority. This study contributes to the field by optimizing the CDWM by applying the top-priority strategies resulted from the proposed fuzzy hybrid MCDM methodology by the decision-makers or policy-makers to reach the best managerial strategic plan.Originality/valueIn the proposed methodology, the IDOCRIW technique is utilized and updated with the triangular fuzzy numbers for the first time in the literature to derive the weights of sustainable development criteria. The fuzzy WASPAS method is utilized for evaluation and providing a final ranking of the strategic alternatives.

Life cycle assessment of construction and demolition waste management systems: a Spanish case study

2011 ◽  
Vol 17 (2) ◽  
pp. 232-241 ◽  
Author(s):  
Irma T. Mercante ◽  
María D. Bovea ◽  
Valeria Ibáñez-Forés ◽  
Alejandro P. Arena
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Waste Management ◽  
Construction And Demolition Waste ◽  
Management Systems ◽  
Demolition Waste

Investigation of waste diversion rates in the construction and demolition sector in Australia

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Shiyamini Ratnasabapathy ◽  
Ali Alashwal ◽  
Srinath Perera
Keyword(s):  
Waste Management ◽  
Descriptive Analysis ◽  
Construction And Demolition Waste ◽  
Current Status ◽  
Accurate Estimation ◽  
Demolition Waste ◽  
Effective Measure ◽  
Content Type ◽  
Waste Diversion

PurposeWaste diversion rate (WDR) is a key indicator of effective waste management and circular economy. However, it has not yet been widely used in the construction and demolition waste (C&DW) sector. This study aims to promote the application of WDR as an effective measure for waste management through the investigation of the current status of C&DW diversion in the Australian construction industry.Design/methodology/approachA mixed-method approach, which combines a desk study and a case study of 12 residential projects was used in this study. Data retrieved from the National Waste Database (NWD) were used for the descriptive analysis.FindingsThe analysis of the national waste data revealed that the national average WDR in Australia is 64%. WDR varies based on material types and across the states. The analysis facilitated the forecasting of the possible future trend of waste diversion in Australia. The studied projects from two states in Australia presented slightly different results. Most of the waste stream, except mixed waste, presented above 95% of WDR in each project.Research limitations/implicationsAlthough the studied projects showed a higher recycling rate, this study claims that achieving a higher rate of recovery by diverting the waste could not be assured unless accurate estimation is carried out with reliable and verifiable data. Lack of reliable data is considered as the limitation of this study. While the scope of descriptive analysis of waste generation and diversion covers the whole country, the case study analysis is limited to the states of New South Wales and Victoria.Originality/valueThe study highlights the significance of WDR in assessing the performance of effective waste management in the C&DW sector. WDR is a comprehensive measure that takes the output of the waste life cycle into account for benchmarking waste management. The results provide a critique of the current practices of waste management and the essence of the consistent, transparent and verifiable waste data to enable accurate WDR estimation in Australia. The outcome is useful for waste managers and policymakers in developing potential waste management strategies and C&DW specific legislation for building a more ecologically sustainable industry.

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