scholarly journals CONSTRUCTION AND DEMOLITION WASTE ILLEGAL DUMPING: ENVIRONMENTAL, SOCIAL AND ECONOMIC IMPACTS ASSESSMENT FOR A GROWING CITY

2021 ◽  
Vol 9 (4) ◽  
pp. 148-155
Author(s):  
Ngoc Cham Luu ◽  
Lan Huong Nguyen ◽  
Thi Viet Nga Tran ◽  
Yugo Isobe ◽  
Mikio Kawasaki ◽  
...  
Keyword(s):  
Economic Impacts ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Illegal Dumping

Efficient supervision strategy for illegal dumping of construction and demolition waste: A networked game theory decision-making model

2021 ◽  
pp. 0734242X2110320
Author(s):  
Chenyu Liu ◽  
Chunxiang Hua ◽  
Jianguo Chen
Keyword(s):  
Decision Making ◽  
Forest Fires ◽  
Evolutionary Game ◽  
Small World ◽  
Economic Benefits ◽  
Construction And Demolition Waste ◽  
Demolition Waste ◽  
Illegal Dumping ◽  
Government Supervision ◽  
The Government

While the construction industry has brought substantial economic benefits to society, it has also generated substantial construction and demolition waste (CDW). Illegal dumping, which refers to dumping CDW in an unauthorized non-filling location, has become widespread in many countries and regions. Illegally dumping CDW destroys the environment, causing groundwater pollution and forest fires and causing significant economic impacts. However, there is a lack of research on the decision-making behaviours and logical rules of the main participants, construction contractors and the government in the illegal CDW dumping process. This paper constructs an evolutionary game model on a small-world network considering government supervision to portray the decision-making behaviours of illegal dumping participants and conducts a numerical simulation based on empirical equations to propose an effective supervision strategy for the government to manage illegal CDW dumping efficiently. It is found that the illegal dumping behaviours of contractors are mainly affected by the intensity of government supervision, the cost of fines and the income of illegal dumping; while for government, a supervision strategy is found to be necessary, and a supervision intensity of approximately 0.7 is the optimal supervision probability given supervision efficiency. Notably, under a low-level supervision probability, increasing the penalty alone does not curb illegal dumping, and a certain degree of supervision must be maintained. The results show that in addition to setting fines for illegal dumping, the government must enforce a certain level of supervision and purify the market environment to steadily reduce illegal dumping.

scholarly journals Comparative Analysis of Economic Impacts of Sustainable Vertical Extension Methods for Existing Underground Spaces

2020 ◽  
Vol 12 (3) ◽  
pp. 975 ◽  
Author(s):  
Soo-yeon Seo ◽  
Byunghee Lee ◽  
Jongsung Won
Keyword(s):  
Economic Impacts ◽  
Construction And Demolition Waste ◽  
Existing Buildings ◽  
Top Down ◽  
Construction Costs ◽  
Demolition Waste ◽  
Existing Building ◽  
Vertical Extension ◽  
Unit Costs ◽  
Construction Techniques

Without demolishing an entire existing building, it is possible to sustainably expand its underground spaces to enhance the building’s functionality. However, there have been a few relevant studies exploring this option, and they did not consider the financial feasibilities of underground vertical extension methods. Therefore, this paper analyzes the economic impacts of three sustainable vertical extension methods for existing underground spaces. The extension methods were the (1) bottom-up, (2) normal top-down, and (3) top-down with multi-post downward (MPD) methods. In order to analyze and compare the economic impacts of the underground vertical extension methods, 24 illustrative examples were generated in this paper. Construction costs of the three sustainable vertical extension methods for existing underground spaces are calculated and compared. Those are based on the quantity of used materials in the construction phase and dismantled materials in the demolition phase, as well as unit costs of each material. In addition, the structural stabilities of the examples are analyzed using MIDAS Gen 2017. As the results, the top-down method with MPD was the lowest sustainable method for vertically expanding underground spaces compared to other two methods under the same condition. Moreover, the higher the number of underground floors of existing buildings and the greater the number of extended basement floors, the more economically advantageous was the top-down method with MPD. Considering their structural stabilities and economic impacts of the extension methods help practitioners to select appropriate construction techniques and reduce costs, risks, and the amount of generated construction and demolition waste.

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 and Demolition Waste in Romania: The Route from Illegal Dumping to Building Materials

2019 ◽  
Author(s):  
Florin Constantin MIHAI
Keyword(s):  
Waste Management ◽  
Building Materials ◽  
Cement Industry ◽  
Construction And Demolition Waste ◽  
Recycled Aggregates ◽  
Management Systems ◽  
Demolition Waste ◽  
Illegal Dumping ◽  
Integrated Waste Management ◽  
Critical Overview

The paper performs a critical overview concerning the construction and demolition waste (C&DW) management issues in Romania. Five main stages related to C&DW management are highlighted such as: (i) illegal dumping on public lands; (ii) C&DW collection and disposal in urban landfills; (iii) C&DW treatment and reuse in civil constructions (roads, coating material for landfills); (iv) regional integrated waste management systems; (v) recycling of building materials (e.g., cement industry and recycled aggregates). The paper reveals the poor monitoring of C&DW flows across Romanian counties and the geographical dimension of this waste stream collected by waste operators. The paper examines the current challenges in Romania and it reveals the future prospects to provide a reliable transition towards sustainable C&DW management activities. The targeted route: waste fractions can be recycled and/or reused as building materials via integrated waste management systems, which enable a circular economy in urban and rural municipalities.

scholarly journals Construction and Demolition Waste in Romania: The Route from Illegal Dumping to Building Materials

2019 ◽  
Vol 11 (11) ◽  
pp. 3179 ◽  
Author(s):  
Florin-Constantin Mihai
Keyword(s):  
Waste Management ◽  
Building Materials ◽  
Cement Industry ◽  
Construction And Demolition Waste ◽  
Recycled Aggregates ◽  
Management Systems ◽  
Demolition Waste ◽  
Illegal Dumping ◽  
Integrated Waste Management ◽  
Critical Overview

The paper performs a critical overview concerning the construction and demolition waste (C&DW) management issues in Romania. Five main stages related to C&DW management are highlighted such as: (i) illegal dumping on public lands; (ii) C&DW collection and disposal in urban landfills; (iii) C&DW treatment and reuse in civil constructions (roads, coating material for landfills); (iv) regional integrated waste management systems; (v) recycling of building materials (e.g., cement industry and recycled aggregates). The paper reveals the poor monitoring of C&DW flows across Romanian counties and the geographical dimension of this waste stream collected by waste operators. The paper examines the current challenges in Romania and it reveals the future prospects to provide a reliable transition towards sustainable C&DW management activities. The targeted route: waste fractions can be recycled and/or reused as building materials via integrated waste management systems, which enable a circular economy in urban and rural municipalities.

A culture-based solution for construction and demolition waste management in Sri Lanka: a literature review

2019 ◽  
Author(s):  
A.P.K.D. Mendis ◽  
◽  
A. Samaraweera ◽  
D.M.G.B.T. Kumarasiri ◽  
D. Rajini ◽  
...  
Keyword(s):  
Sri Lanka ◽  
Literature Review ◽  
Waste Management ◽  
Construction And Demolition Waste ◽  
Demolition Waste

CONCRETO PERMEÁVEL COM AGREGADO DA RECICLAGEM DE RESÍDUOS DA CONSTRUÇÃO E DEMOLIÇÃO: REVISÃO BIBLIOGRÁFICA / PERMEABLE CONCRETE WITH AGGREGATE FROM CONSTRUCTION AND DEMOLITION WASTE RECYCLING: LITERATURE REVIEW

2020 ◽  
Vol 6 (9) ◽  
pp. 73169-73180
Author(s):  
Kelly Patrícia Torres Vieira Brasileiro ◽  
Bacus de Oliveira Nahime ◽  
Michell Macedo Alves ◽  
Pâmela Millena Kunan ◽  
Vitor Alvares ◽  
...  
Keyword(s):  
Literature Review ◽  
Waste Recycling ◽  
Construction And Demolition Waste ◽  
Demolition Waste

Simulation analysis of implementation effects of construction and demolition waste disposal policies

2021 ◽  
Vol 126 ◽  
pp. 684-693
Author(s):  
Haizi Wang ◽  
Xinming Pan ◽  
Shibin Zhang ◽  
Pengfei Zhang
Keyword(s):  
Waste Disposal ◽  
Simulation Analysis ◽  
Construction And Demolition Waste ◽  
Demolition Waste

scholarly journals Application of Construction and Demolition Waste in Civil Construction in the Brazilian Amazon—Case Study of the City of Rio Branco

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2247
Author(s):  
Fernando da Silva Souza ◽  
José Maria Franco de Carvalho ◽  
Gabriela Grotti Silveira ◽  
Vitória Cordeiro Araújo ◽  
Ricardo André Fiorotti Peixoto
Keyword(s):  
Mechanical Strength ◽  
Raw Materials ◽  
Amazon Region ◽  
Construction And Demolition Waste ◽  
Recycled Aggregates ◽  
Federal State ◽  
Construction Sites ◽  
Demolition Waste ◽  
Conventional Concrete ◽  
Initial Adhesion

The lack of usable aggregates for civil construction in Rio Branco (capital of Acre, a Federal State in the Amazon region) makes the production and use of recycled aggregates from construction and demolition waste (CDW) an alternative of great interest. In this study, a comprehensive characterization of CDW collected from 24 construction sites of six building types and three different construction phases (structures, masonry, and finishing) was carried out. The fine and coarse recycled aggregates were produced and evaluated in 10 different compositions. The aggregates’ performance was evaluated in four mixtures designed for laying and coating mortars with a total replacement of conventional aggregates and a mixture designed for a C25 concrete with 50% and 100% replacement of conventional aggregates. CDW mortars showed lower densities and greater water retention, initial adhesion, and mechanical strength than conventional mortars. CDW concretes presented lower densities and greater resistance to chloride penetration than conventional concrete, with a small mechanical strength reduction. The recycled CDW aggregates proved to be technologically feasible for safe application in mortars and concrete; for this reason, it is believed that the alternative and proposed methodology is of great interest to the Amazonian construction industry, considering the high costs of raw materials and the need for defining and consolidating a sustainable development model for the Amazon region.

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