Quality and quantity of construction and demolition waste in Tehran

Asgari, Alireza; Ghorbanian, Tahereh; Yousefi, Nader; Dadashzadeh, Dariush; Khalili, Fatemeh; Bagheri, Amin; Raei, Mehdi; Mahvi, Amir Hossein

doi:10.1186/s40201-017-0276-0

Cited by 50 publications

(30 citation statements)

References 13 publications

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“…The share of plastic within CDW is unknown, and the values have varied greatly at the global level from 1 to almost 10% in previous studies [17,18]. The more commonly studied MSW globally includes 8–12% plastic waste [19].…”

Section: Resultsmentioning

confidence: 99%

Composition of Plastic Fractions in Waste Streams: Toward More Efficient Recycling and Utilization

2019

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Reuse of materials is a significant global goal that contributes to sustainable development. Polymer-specific plastic identification from the waste stream is examined in this study to achieve environmentally optimistic reuse of plastic material in secondary applications. Two diverse waste streams, 86.11 kg of construction and demolition waste (CDW) plastic and 57.74 kg of mechanically sorted plastic, were analyzed by using a handheld tool whose identification technology was based on the near-infrared spectrum. The study indicates a significant effect of human and single fraction on manual separation. The polymer composition in the plastic waste stream varied depending on the source, but the most common plastic grades, polypropylene (PP) and polyethylene (PE), were represented in every waste stream. The waste stream also included unidentified and unfavorable wastes, which indicates that identification of the plastic fractions is needed and more studies should be done in this field in the future.

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Section: Resultsmentioning

confidence: 99%

Composition of Plastic Fractions in Waste Streams: Toward More Efficient Recycling and Utilization

2019

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“…It should be noted that this general regulation is not practical for CDW management. The CDW management in Tehran suffers mainly from insufficient funds allocated to CDW management, the lack of an effective CDW management plan, lack of regulations in the field of CDW management, the lack of skilled personnel in implementing a CDW management plan, and also limited public participation (Asgari et al, 2017). Moreover, available official statistical data for CDW is limited.…”

Section: Study Areamentioning

confidence: 99%

Construction and demolition waste management: Fuzzy Analytic Hierarchy Process approach

et al. 2020

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Construction and Demolition Waste (CDW) has recently received significant attention in the most developing countries, such as Iran. Since CDW generation is unavoidable, so development and implementation of an appropriate CDW management is widely recognized as an essential need. Different alternatives in CDW management have been proposed and implemented currently. In this study, a novel framework was established based on the Fuzzy Analytic Hierarchy Process approach in order to assess different CDW management alternatives in Tehran, Iran. Proposed alternatives (including landfilling, recycling, reusing, and reduction) were investigated with respect to 16 different individual criteria. The criteria were divided into four different groups, namely environmental, social, technical, economic. A database in this study was established through a questionnaire survey. The relative significance of alternatives with respect to each criterion was assessed. The obtained results revealed that reduction has the highest and landfilling has the lowest priorities. Furthermore, it was found that economic criteria have the highest and social criteria have the lowest importance among the studied criteria. Also, the proposed framework can be used as a beneficial tool that will assist decision-makers in determining the most suitable CDW management alternatives in the case of different criteria that are completely/partially in conflict.

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“…In China, annual C&D waste generation reportedly reached one billion tons in 2013, 74% of which resulted from demolition activities (NDRC, 2014; Lu et al, 2016c). [2] According to [3], it was reported the obtained results, about 82,646,051 m3 of C&D waste (average 16,529,210 m3 per year) were generated during 2011 to 2016 which only about 26% of them has been recycled. Mixing sand and cement, concrete, broken bricks and soil have the highest amount of the composition of C&D waste in Tehran that was 30, 19, 18 and 11%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Integration of Building Information Modelling (Bim) and Industrialized Building System (Ibs)

Othman

Mohamad

Napiah

et al. 2020

Int. J. Eng. Tech. Mgmt. Res.

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The Construction industry in Malaysia is always progressively moved ahead with the full support from the Malaysian government through the Construction Industry Development Board (CIDB). As report by CIDB, “there were 34,172 projects valued at RM 407 Billion for the 2006-2010 (9th Malaysia Plan) period, compared to 30,717 projects valued at RM 507 Billion for the 2011-2014 periods. Infrastructure projects such as road, major bridges, railways, ports/airports and other major civil works are avenues for major capital influx into the areas where work will be undertaken. The impact to downstream economy can be immediate at the start of the construction and can continue during the operations itself. It is for this reason that local residents get excited when new major infrastructures are established in their locality. Coupled with the promised economic and financial benefits of the construction industry, the activities themselves generate considerable waste materials at the worksites, workers’ campsites, and ancillary facilities. The aim of this research is to investigate the use of BIM as a platform and IBS construction to aid construction waste minimisation, and to develop and validate a BIM-IBS aided waste minimisation Framework in design. Reducing construction waste has been driven by economic and environmental consideration due to the cost of waste, which is about 15 times that of disposal. Thus, the construction industry has been exploring and developing effective and efficient approaches to minimise waste generation In the context of this research, construction waste minimisation (CWM) is a process for preventing, eliminating or reducing waste at its source during design.

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Quality and quantity of construction and demolition waste in Tehran

Cited by 50 publications

References 13 publications

Composition of Plastic Fractions in Waste Streams: Toward More Efficient Recycling and Utilization

Composition of Plastic Fractions in Waste Streams: Toward More Efficient Recycling and Utilization

Construction and demolition waste management: Fuzzy Analytic Hierarchy Process approach

Integration of Building Information Modelling (Bim) and Industrialized Building System (Ibs)

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