The Experts below are selected from a list of 144453 Experts worldwide ranked by ideXlab platform
Weisheng Lu - One of the best experts on this subject based on the ideXlab platform.
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evaluating the effects of green building on Construction Waste management a comparative study of three green building rating systems
Building and Environment, 2019Co-Authors: Weisheng Lu, Anna ZetkulicAbstract:Abstract The impacts of buildings on our life, business, and natural environment have fueled a global trend in the building industry to “go green”. This has helped proliferate various green building rating systems (GBRSs) around the world. While previous studies have examined the effects of these systems on such aspects as resources consumption, indoor air quality and property value, little research, if any, has examined their effects on Construction Waste management (CWM). This study aims to evaluate the effects of GBRSs on CWM, and to understand the causes behind the effects thereof ascertained. Three GBRSs, including the U.S.-developed Leadership in Energy and Environmental Design (LEED), Mainland China's GB Evaluation Label (GBEL) and Hong Kong's Building Environmental Assessment Method (BEAM Plus) are selected for comparative study. A combination of desktop archive analysis and semi-structured interviews formed the study's mixed method approach. Surprisingly, the study reveals that the three GBRSs do not greatly promote superior CWM performance despite their respective CWM targeted credits. Possible causes, as informed by the interviewees, include the design of rating systems themselves, developers' biases, and lack of incentives to improve CWM. Legal and economic incentives are more decisive drivers of responsible CWM. This paper also provides demonstrable qualitative evidence for legislators and associated bodies to achieve continued improvement in CWM via GBRSs.
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computational building information modelling for Construction Waste management moving from rhetoric to reality
Renewable & Sustainable Energy Reviews, 2017Co-Authors: Weisheng Lu, Chris Webster, Xiaoling Zhang, Ke Chen, Xi ChenAbstract:There is a lively debate on the application of Building Information Modelling (BIM) to Construction Waste management (CWM). BIM can be utilized as a less expensive, virtual, and computational environment to enable designers to ponder different design options, or contractors to evaluate different Construction schemes, both with a view to minimizing Construction Waste generation. However, existing debate on this topic too frequently treats BIM as a cure-all silver bullet; without some major hurdles being adequately addressed, the applications of BIM will remain rhetorical. This paper aims to demystify BIM's computational application to CWM. Based on a critical literature review, a prototypical framework of a computational BIM for CWM is delineated, within which the two key prerequisites of ‘information readiness’ and ‘computational algorithms’ are highlighted. Then, the paper details the required information and how it can be organized in a standalone database or encapsulated in existing BIM for CWM. Learning from the historical development of data infrastructure in the field of BIM-based cost management, the process to develop the required information is likely to be tortuous but is unavoidable. The paper further explores computational BIM algorithms that can manipulate the information to facilitate decision-making for CWM. Finally, the operation of computational BIM is elaborated by relating it to various prevailing procurement models within which BIM applications are contextualized. Although the framework reported here has been substantially developed for experimental application, , it is not to be taken as an immediately applicable solution but rather as an illustration of the kind of platform on which future development of computational BIM for CWM can proceed in a more efficient and effective fashion.
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the s curve for forecasting Waste generation in Construction projects
Science & Engineering Faculty, 2016Co-Authors: Weisheng Lu, Xi Chen, Martin Skitmore, Yi Peng, Xiaoling ZhangAbstract:Forecasting Construction Waste generation is the yardstick of any effort by policy-makers, researchers, practitioners and the like to manage Construction and demolition (C&D) Waste. This paper develops and tests an S-curve model to indicate accumulative Waste generation as a project progresses. Using 37,148 disposal records generated from 138 building projects in Hong Kong in four consecutive years from Jan 2011 to June 2015, a wide range of potential S-curve models are examined, and as a result, the formula that best fits the historical data set is found. The S-curve model is then further linked to project characteristics using artificial neural networks (ANNs) so that it can be used to forecast Waste generation in future Construction projects. It was found that, amongst the S-curve models, cumulative logistic distribution is the best formula to fit the historical data. Meanwhile, contract sum, location, public-private nature, and duration can be used to forecast Construction Waste generation. The study provides contractors with not only an S-curve model to forecast overall Waste generation before a project commences, but also with a detailed baseline to benchmark and manage Waste during the course of Construction. The major contribution of this paper is to the body of knowledge in the field of Construction Waste generation forecasting. By examining it with an S-curve model, the study elevates Construction Waste management to a level equivalent to project cost management where the model has already been readily accepted as a standard tool.
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Construction Waste management profiles practices and performance a cross jurisdictional analysis in four countries
Sustainability, 2016Co-Authors: Weisheng LuAbstract:Construction Waste management (CWM) has received worldwide attention for some time. As a result, a plethora of research, investigating a wide array of CWM issues such as their profiles, practices, and performance, has been reported in individual economies around the globe. However, a cross-jurisdictional comparison of these issues is limitedly presented in the literature despite its importance to benchmarking performance and identifying best CWM practices in the context of globalization whereby knowledge sharing has already transcended traditional country boundaries. The aim of this ex post facto research is to compare CWM profiles, practices, and performance in Australia, Europe (Europe refers to EU-27 member countries in the European Union, including Belgium, France, Germany, Italy, Luxembourg, Netherlands, Denmark, Great Britain, Ireland, Portugal, Spain, Greece, Austria, Finland, Sweden, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Poland, Slovakia, Slovenia, Malta, Cyprus, Bulgaria, and Romania.), Hong Kong, and the United Kingdom at a national-level, with a view to facilitating CWM knowledge sharing internationally. It does so by triangulating empirical data collected from various national statistical yearbooks with research papers and professional reports on CWM in these economies. It is found that in producing one million (US) dollars’ work, Construction contributes a volume of solid Waste ranging from 28 to 121 tons among countries. Conscientious CWM practices can make a significant difference in reducing, reusing, or recycling Construction Waste, as evident in the large variation in the CWM performance. While it might be oversimplified to conclude that the best practices in one country can be applied in another, the research provides insightful references into sharing CWM knowledge across boundaries.
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analysis of the Construction Waste management performance in hong kong the public and private sectors compared using big data
Journal of Cleaner Production, 2016Co-Authors: Weisheng Lu, Daniel Chi Wing Ho, Xi Chen, Hongdi WangAbstract:Abstract There is an ongoing debate concerning the disparity between the public and private sectors in relation to Construction Waste management (CWM) performance: some argue that CWM performance between the two sectors should have no difference since they are under the governance of the same set of CWM related regulations, while others argue that public sector clients should perform better as they are subject to greater social scrutiny. Previous studies comparing CWM performance have suffered from insufficient quality data, leaving the debate on the CWM performance disparity largely inconclusive. Informed by the Coase Invariant Theorem, this research empirically compares CWM performance between public and private projects. It does so by using big data in the form of 2 million Waste disposal records generated from around 5700 projects undertaken in Hong Kong during 2011 and 2012. It is found that there is a notable CWM performance disparity between the public and private sectors, with contractors performing better in managing both inert and non-inert Waste in public projects than they do in private projects. Furthermore, the interviews and case studies conducted as part of the research suggest that CWM transaction costs are not high enough to incentivize contractors to manage Waste conscientiously and therefore other institutional arrangements, such as promoting the value of environment protection leadership, are critical for achieving superior CWM performance. The research therefore supports the corollary of Coase Invariant Theorem, which asserts that certain forms of institutions would improve CWM performance by reducing transaction cost even though both sectors are subject to the same set of CWM-related formal public policies.
Hongping Yuan - One of the best experts on this subject based on the ideXlab platform.
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critical management measures contributing to Construction Waste management evidence from Construction projects in china
Project Management Journal, 2013Co-Authors: Hongping YuanAbstract:To alleviate the generation of grave Construction Waste, it is imperative for China to minimize its Construction Waste; however, critical measures that are effective in managing Construction Waste ...
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the evolution of Construction Waste sorting on site
Renewable & Sustainable Energy Reviews, 2013Co-Authors: Hongping Yuan, Weisheng LuAbstract:Construction Waste comprises inert (e.g., sand, bricks, and concrete) and non-inert materials (e.g., bamboo, plastics, glass, wood, and paper). In Hong Kong, the inert portion can be deposited at public filling areas for land reclamation while the non-inert portion is disposed of at landfills. However, Construction Waste is usually a mixture of both inert and non-inert materials and thus a segregation of the two portions is of paramount importance for effective Waste minimization. Previous studies have revealed that Construction contractors in Hong Kong were unwilling to carry out on-site Construction Waste sorting (CWS) even though it has numerous advantages. After a decade, the situation should have changed, particularly given the promulgation of a Waste charging scheme in 2006 imposing levies on different methods of Construction Waste disposal. This study thus aims at ascertaining the state-of-the-art on-site CWS practices in Hong Kong, with a particular interest in its evolution over the past ten years. Data was collected through case studies of six Construction sites where a hybrid research method included a literature review, non-participant observations, and interviews. It was found that Construction Waste management (CWM) regulations have significantly enhanced on-site CWS in Hong Kong. Site space and project stakeholders’ attitudes are still regarded as the most critical factors but labor and cost are no longer of major concerns in undertaking on-site CWS. Instead, a market for recyclables and an awareness of the profound environmental benefits are now perceived as being of major importance in these practices. Findings from the study can be used to review the effectiveness of current on-site CWS in Hong Kong, and through benchmarking they can also be used to develop good CWS practices in other economies.
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a swot analysis of successful Construction Waste management
Journal of Cleaner Production, 2013Co-Authors: Hongping YuanAbstract:Recent years have witnessed a significant amount of Construction Waste as a result of rapid urbanization and large scale of Construction activities in China. However, compared to many advanced western countries, very few studies have been carried out for investigating the Construction Waste management problems in China. This study, by conducting a strength, weakness, opportunity, and threat (SWOT) analysis, aims to help understand the status quo of Construction Waste management based on the particular context of Shenzhen city in south China. Data supporting the analysis are derived from multiple channels including governmental reports, Waste management related regulations, literature review, and focus group meetings. The study opens a window through which major stakeholders involved can perceive the internal and external conditions of Construction Waste management in Shenzhen. The seven critical strategies, which are presented based on the SWOTs identified, could be useful for Shenzhen to develop and promote its future Construction Waste management at the strategic level.
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off site sorting of Construction Waste what can we learn from hong kong
Resources Conservation and Recycling, 2012Co-Authors: Weisheng Lu, Hongping YuanAbstract:Abstract To tackle the large amount of solid Waste generated from Construction activities, Hong Kong has issued a series of Construction Waste management policies in the last twenty years. One of the most significant policies is the launch of an off-site Construction Waste sorting (CWS) program. Since its implementation in 2006, the off-site CWS program has contributed greatly to Construction Waste minimization by hitherto separating 5.11 million tons of Construction Waste in total. This paper aims at carrying out a thorough investigation into the off-site CWS program in Hong Kong. Both successful experience and existent shortcomings in relation to the CWS program are discussed in detail. Data on which the analysis and discussions are based are mainly obtained from two channels. One is from literature review and examination on government regulations and statistics, while the other is from two empirical case studies carried out at the Tuen Mun Construction Waste sorting facility. The findings reveal that the success of the off-site CWS program is mainly attributed to ‘sustaining policy support from the Hong Kong government’, ‘good policy execution’, ‘encouraging off-site CWS through higher disposal charges’ and ‘implementation of the trip-ticket system’. Suggestions for further enhancing the effectiveness of the off-site CWS program are also proposed. The study is not only useful for decision makers to further improve the overall effectiveness of this practice, but also provides valuable references for other countries or regions in minimizing Construction Waste through off-site Waste sorting program.
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a model for evaluating the social performance of Construction Waste management
Waste Management, 2012Co-Authors: Hongping YuanAbstract:It has been determined by existing literature that a lot of research efforts have been made to the economic performance of Construction Waste management (CWM), but less attention is paid to investigation of the social performance of CWM. This study therefore attempts to develop a model for quantitatively evaluating the social performance of CWM by using a system dynamics (SD) approach. Firstly, major variables affecting the social performance of CWM are identified and a holistic system for assessing the social performance of CWM is formulated in line with feedback relationships underlying these variables. The developed system is then converted into a SD model through the software iThink. An empirical case study is finally conducted to demonstrate application of the model. Results of model validation indicate that the model is robust and reasonable to reflect the situation of the real system under study. Findings of the case study offer helpful insights into effectively promoting the social performance of CWM of the project investigated. Furthermore, the model exhibits great potential to function as an experimental platform for dynamically evaluating effects of management measures on improving the social performance of CWM of Construction projects.
Abdul Hamid Jaafar - One of the best experts on this subject based on the ideXlab platform.
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implementation of Waste management and minimisation in the Construction industry of malaysia
Resources Conservation and Recycling, 2007Co-Authors: Rawshan Ara Begum, Joy Jacqueline Pereira, Chamhuri Siwar, Abdul Hamid JaafarAbstract:Construction Waste has a major impact on the environment. With the demands in implementing major infrastructure projects in Malaysia, together with many commercial building and housing development programmes, a large amount of Construction Waste is being produced by the Construction sector. Thus, Waste minimisation is an important area of concern in the implementation of the Construction Waste management in the Construction industry of Malaysia. This study identified 12 Waste minimisation factors (WMF) in implementing Construction Waste management in the Construction industry. This study provides empirical evidence on the significant level of contribution and the level of practice among the Waste minimisation factors by following the model of weighted average and minimisation and practiced index value. The results of the analysis indicate the most significant, least significant and significant factors that contribute to Waste minimisation and the most practiced, least practiced and practiced Waste minimisation factors in the Malaysian Construction industry. The findings will assist in the formulation of appropriate policy interventions in addressing the Construction Waste management problem in Malaysia and indirectly improving the quality of Construction in the country.
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factors and values of willingness to pay for improved Construction Waste management a perspective of malaysian contractors
Waste Management, 2007Co-Authors: Rawshan Ara Begum, Joy Jacqueline Pereira, Chamhuri Siwar, Abdul Hamid JaafarAbstract:Abstract Malaysia is facing an increase in the generation of Waste and of accompanying problems with the disposal of this Waste. In the last two decades, extensive building and infrastructure development projects have led to an increase in the generation of Construction Waste material. The Construction industry has a substantial impact on the environment, and its environmental effects are in direct relation to the quality and quantity of the Waste it generates. This paper discusses general characteristics of the Construction contractors, the contractors’ willingness to pay (WTP) for improved Construction Waste management, determining factors which affect the amount of their willingness to pay, and suggestions and policy implications in the perspective of Construction Waste management in Malaysia. The data in this study is based on contractors registered with the Construction industry development board (CIDB) of Malaysia. Employing the open ended contingent valuation method, the study assessed the contractors’ average maximum WTP for improved Construction Waste management to be RM69.88 (1 US$ = 3.6 RM) per tonne of Waste. The result shows that the average maximum WTP is higher for large contractors than for medium and small contractors. The highest average maximum WTP value is RM88.00 for Group A (large contractors) RM78.25 for Group B (medium-size contractors) and RM55.80 for Group C (small contractors). One of the contributions of this study is to highlight the difference of CIDB registration grade in the WTP for improved Construction Waste management. It is found that contractors’ WTP for improved Waste collection and disposal services increases with the increase in contractors’ current paid up capital. The identified factors and determinants of the WTP will assist the formulation of appropriate policies in addressing the Construction Waste problem in Malaysia and indirectly improve the quality of Construction in the country.
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a benefit cost analysis on the economic feasibility of Construction Waste minimisation the case of malaysia
Resources Conservation and Recycling, 2006Co-Authors: Rawshan Ara Begum, Joy Jacqueline Pereira, Chamhuri Siwar, Abdul Hamid JaafarAbstract:Abstract Construction Waste is becoming a serious environmental problem in many large cities in the world. In Malaysia, the Construction industry generates lots of Construction Waste which caused significant impacts on the environment and aroused growing public concern in the local community. Thus, the minimisation of Construction Wastes has become a pressing issue. This paper is based on a case study which involved Construction Waste generation and composition as well as reuse and recycling in the site. The case study also analysed the economic feasibility of Waste minimisation such as reusing and recycling of Construction Waste materials by performing a benefit–cost analysis. This study provides an idea of the amount of Waste generation, sources and compositions as well as reuse and recycling of materials on the Construction sites taking into account the economic dimension. The study shows that Waste minimisation is economically feasible and also plays an important role for the improvement of environmental management. In this view, economic instruments for minimising Construction Waste can be used to raise revenue for environmental policy, encourage prevention efforts, serve to discourage the least desirable disposal practices, as well as to avoid the negative consequences of environmental unfriendly treatment and disposal practices of Construction Waste materials.
Jack Chin Pang Cheng - One of the best experts on this subject based on the ideXlab platform.
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quantification of Construction Waste prevented by bim based design validation case studies in south korea
Waste Management, 2016Co-Authors: Jack Chin Pang ChengAbstract:Abstract Waste generated in Construction and demolition processes comprised around 50% of the solid Waste in South Korea in 2013. Many cases show that design validation based on building information modeling (BIM) is an effective means to reduce the amount of Construction Waste since Construction Waste is mainly generated due to improper design and unexpected changes in the design and Construction phases. However, the amount of Construction Waste that could be avoided by adopting BIM-based design validation has been unknown. This paper aims to estimate the amount of Construction Waste prevented by a BIM-based design validation process based on the amount of Construction Waste that might be generated due to design errors. Two project cases in South Korea were studied in this paper, with 381 and 136 design errors detected, respectively during the BIM-based design validation. Each design error was categorized according to its cause and the likelihood of detection before Construction. The case studies show that BIM-based design validation could prevent 4.3–15.2% of Construction Waste that might have been generated without using BIM.
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formulation and analysis of dynamic supply chain of backfill in Construction Waste management using agent based modeling
Advanced Engineering Informatics, 2015Co-Authors: Jack Chin Pang ChengAbstract:This paper proposes two optimization models to solve a dynamic supply chain issue.The outcomes help reuse and recycle backfill, a major type of Construction Waste.The models are based on mathematical programming and agent-based modeling.The comparative study illustrates the performance of both approaches.Agent-based modeling is more capable of analyzing the dynamic supply chain. Backfill is the excavated material from earthworks, which constitutes over 50% of the Construction Wastes in Hong Kong. This paper considers a supply chain that consists of Construction sites, landfills and commercial sources in which operators seek cooperation to maximize backfill reuse and improve Waste recovery efficiency. Unlike the ordinary material supply chain in manufacturing industries, the supply chain for backfill involves many dynamic processes, which increases the complexity of analyzing and solving the logistic issue. Therefore, this study attempts to identify an appropriate methodology to analyze the dynamic supply chain, for facilitating the backfill reuse. A centralized optimization model and a distributed agent-based model are proposed and implemented in comparing their performances. The centralized optimization model can obtain a global optimum but requires sharing of complete information from all supply chain entities, resulting in barriers for implementation. In addition, whenever the backfill supply chain changes, the centralized optimization model needs to reconfigure the network structure and recompute the optimum. The distributed agent-based model focuses on task distribution and cooperation between business entities in the backfill supply chain. In the agent-based model, decision making and communication between Construction sites, landfills, and commercial sources are emulated by a number of autonomous agents. They perform together through a negotiation algorithm for optimizing the supply chain configuration that reduces the backfill shipment cost. A comparative study indicates that the agent-based model is more capable of studying the dynamic backfill supply chain due to its decentralization of optimization and fast reaction to unexpected disturbances.
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rfid supported cooperation for Construction Waste management
Cooperative Design Visualization and Engineering, 2011Co-Authors: Jack Chin Pang Cheng, Lauren Y HAbstract:The severity of Construction and demolition Waste problem has been observed around the world in recent years. Therefore, management of Construction Waste is important worldwide. Currently, radio frequency identification (RFID) technology is a growing technology which has been applied in many areas including the Construction industry. This paper discusses the application of RFID technology for Construction Waste management, which is lacking in research in the Construction industry. This paper presents a proposed RFID-based approach to facilitate the cooperation among on-site contractors, pick-up truck companies, and recycling companies. Waste pick-up and recycling could therefore be enhanced. Some reusable Construction Wastes like high strength cables are valuable and prone to be stolen. The proposed system could help the inspection of these Construction Wastes by using the automatic tracking capability of RFID technology.
Joy Jacqueline Pereira - One of the best experts on this subject based on the ideXlab platform.
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Construction Waste minimisation comparing conventional and precast Construction mixed system and ibs methods in high rise buildings a malaysia case study
Resources Conservation and Recycling, 2012Co-Authors: Suresh Kumar Lachimpadi, Joy Jacqueline Pereira, Mohd Raihan Taha, Mazlin MokhtarAbstract:Abstract The Construction industry has always been a major generator of Construction Waste and is often faced with the issue of its effective management in minimising environmental pollution. This research paper focuses on the Construction Waste generated from the Construction of high rise buildings using 3 Construction methods; Conventional Construction (Category I), the Mixed System (Category II) and Industrialised Building System (IBS, Category III). The Construction Waste for each Construction category were characterised into its mineral and non-mineral components. The Construction Waste usage efficiency (CWUE), Waste generation, reuse and recycling rates were also calculated. The IBS (Category III) was found to be the most efficient Construction method with a Waste generation rate (WGR) of 0.016 tons of Construction Waste/m 2 floor space compared to the Mixed System (Category II) at 0.030 tons/m 2 and the Conventional Construction (Category I) at 0.048 tons/m 2 . The Construction Waste usage efficiency (CWUE) was the highest in Category III (IBS) at 94.1% with only 5.9% of the total Construction Waste in this category being disposed at landfills. The Construction Industry Development Board (CIDB) of Malaysia has recognised its benefits and has actively promoted the use of IBS in Malaysia. The Waste characterisation data and its uses (reuse and recycling) obtained from this study could be used as baseline data to promote and encourage the Malaysian Construction industry to adopt the use of precast technology, the Industrialised Building System (Category III) and move away from the more traditional resource hungry Conventional Construction (Category I). The inclusion of the Mixed System (Category II) in this study as an intermediate Construction method was aimed at providing the link between the Conventional Construction (Category I) and the IBS (Category III). The Mixed System (Category II) incorporates both the IBS and Conventional Construction methods. The Conventional Construction (Category I) with the incorporation of new Construction technologies could easily be reclassified as the Mixed System (Category II), allowing Malaysian contractors to easily adopt it. This paves the way for better understanding for the use of precast technology which eventually would result in a positive shift towards the use of the IBS (Category III) by Malaysian contractors in the future. Thus, improving the Construction industry's environmental performance and commitment to sustainable development as outlined by the CIDB's Construction Industry Master Plan 2006–2015 for Malaysia.
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Construction Waste management in a developing country case study of ipoh malaysia
Waste Management, 2008Co-Authors: S A Mahayuddin, Joy Jacqueline Pereira, Wan Hamidon Wan Badaruzzaman, Mazlin MokhtarAbstract:Construction Waste is a growing problem in both developing and developed countries, except that the nature of its generation and handling is country dependent. Developing countries are moving towards better Construction Waste management; however, there is still insufficient collection and improper disposal of Construction Waste. Construction Waste represents large amounts of material that are often illegally dumped by roadsides, river banks and many other open spaces. This causes significant health and environmental problems as well as negative economic impacts on nearby properties. Urgent and immediate improvement of the Construction Waste disposal practices is necessary to meet the current demand for improved Construction Waste management. However, there is very little relevant information on disposal practices for Construction Waste at the municipal level, including its composition and the disposal site characteristics. A study has been conducted in Ipoh, one of the cities in Malaysia to fill the knowledge gap. The study focuses on Construction Waste disposal practices in the city, including the illegal dumping of Construction Waste. A survey has been conducted to investigate the Construction Waste disposed of at the legal and illegal dumpsites around the city. This paper presents a general overview of current Construction Waste management practices in Ipoh. It also describes the problems, issues and challenges faced by Ipoh based on the outcome of a recent study. This paper concludes with the identification of a series of potential ways to improve Construction Waste management at the municipal level.
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implementation of Waste management and minimisation in the Construction industry of malaysia
Resources Conservation and Recycling, 2007Co-Authors: Rawshan Ara Begum, Joy Jacqueline Pereira, Chamhuri Siwar, Abdul Hamid JaafarAbstract:Construction Waste has a major impact on the environment. With the demands in implementing major infrastructure projects in Malaysia, together with many commercial building and housing development programmes, a large amount of Construction Waste is being produced by the Construction sector. Thus, Waste minimisation is an important area of concern in the implementation of the Construction Waste management in the Construction industry of Malaysia. This study identified 12 Waste minimisation factors (WMF) in implementing Construction Waste management in the Construction industry. This study provides empirical evidence on the significant level of contribution and the level of practice among the Waste minimisation factors by following the model of weighted average and minimisation and practiced index value. The results of the analysis indicate the most significant, least significant and significant factors that contribute to Waste minimisation and the most practiced, least practiced and practiced Waste minimisation factors in the Malaysian Construction industry. The findings will assist in the formulation of appropriate policy interventions in addressing the Construction Waste management problem in Malaysia and indirectly improving the quality of Construction in the country.
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factors and values of willingness to pay for improved Construction Waste management a perspective of malaysian contractors
Waste Management, 2007Co-Authors: Rawshan Ara Begum, Joy Jacqueline Pereira, Chamhuri Siwar, Abdul Hamid JaafarAbstract:Abstract Malaysia is facing an increase in the generation of Waste and of accompanying problems with the disposal of this Waste. In the last two decades, extensive building and infrastructure development projects have led to an increase in the generation of Construction Waste material. The Construction industry has a substantial impact on the environment, and its environmental effects are in direct relation to the quality and quantity of the Waste it generates. This paper discusses general characteristics of the Construction contractors, the contractors’ willingness to pay (WTP) for improved Construction Waste management, determining factors which affect the amount of their willingness to pay, and suggestions and policy implications in the perspective of Construction Waste management in Malaysia. The data in this study is based on contractors registered with the Construction industry development board (CIDB) of Malaysia. Employing the open ended contingent valuation method, the study assessed the contractors’ average maximum WTP for improved Construction Waste management to be RM69.88 (1 US$ = 3.6 RM) per tonne of Waste. The result shows that the average maximum WTP is higher for large contractors than for medium and small contractors. The highest average maximum WTP value is RM88.00 for Group A (large contractors) RM78.25 for Group B (medium-size contractors) and RM55.80 for Group C (small contractors). One of the contributions of this study is to highlight the difference of CIDB registration grade in the WTP for improved Construction Waste management. It is found that contractors’ WTP for improved Waste collection and disposal services increases with the increase in contractors’ current paid up capital. The identified factors and determinants of the WTP will assist the formulation of appropriate policies in addressing the Construction Waste problem in Malaysia and indirectly improve the quality of Construction in the country.
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a benefit cost analysis on the economic feasibility of Construction Waste minimisation the case of malaysia
Resources Conservation and Recycling, 2006Co-Authors: Rawshan Ara Begum, Joy Jacqueline Pereira, Chamhuri Siwar, Abdul Hamid JaafarAbstract:Abstract Construction Waste is becoming a serious environmental problem in many large cities in the world. In Malaysia, the Construction industry generates lots of Construction Waste which caused significant impacts on the environment and aroused growing public concern in the local community. Thus, the minimisation of Construction Wastes has become a pressing issue. This paper is based on a case study which involved Construction Waste generation and composition as well as reuse and recycling in the site. The case study also analysed the economic feasibility of Waste minimisation such as reusing and recycling of Construction Waste materials by performing a benefit–cost analysis. This study provides an idea of the amount of Waste generation, sources and compositions as well as reuse and recycling of materials on the Construction sites taking into account the economic dimension. The study shows that Waste minimisation is economically feasible and also plays an important role for the improvement of environmental management. In this view, economic instruments for minimising Construction Waste can be used to raise revenue for environmental policy, encourage prevention efforts, serve to discourage the least desirable disposal practices, as well as to avoid the negative consequences of environmental unfriendly treatment and disposal practices of Construction Waste materials.