Alternative construction and demolition (C&amp;D) waste characterization method proposal

Córdoba, Rodrigo Eduardo; Neto, José da Costa Marques; Santiago, Cristine Diniz; Pugliesi, Érica; Schalch, Valdir

doi:10.1590/s1413-41522019179720

Cited by 15 publications

(5 citation statements)

References 18 publications

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“…RMSW is the residual garbage consisting of a mixed range of materials of high heterogeneity, remaining after the separate collection of recyclable components (like plastic and paper) and other materials such as bulky waste, waste electrical and electronic equipment (WEEE) and household hazardous waste (HHW) [14]. RMSW production is rising faster than the global urbanization rate [8,15,16]. The collection and the disposal of RMSW are frequently unmanaged and unregulated in low-and middle-income nations [17,18].…”

Section: Introductionmentioning

confidence: 99%

Determination of Residual Municipal Solid Waste Composition from Rural and Urban Areas: A Step toward the Optimization of a Waste Management System for Efficient Material Recovery

Triassi,

De Simone,

Montuori

et al. 2023

Sustainability

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Residual municipal solid waste (RMSW) is a rapidly expanding problem worldwide and a good waste management system could reduce concerns about its correct treatment. The purpose of this study was to characterize RMSW from urban and rural areas with the ultimate goal of estimating the recycling potential of the identified fractions and implementing waste collection and recovery methods according to the type of area that generates them. A direct sampling campaign of RMSW was performed. The results showed that the highest organic waste rate was found in the rural area (11.9%); urban-area-produced RMSW mainly constituted recyclable fractions such as plastic (26.3%), paper (21.8%), glass (3.5%) and metals (3.3%). The physical-chemical characteristics of RMSW showed levels of heavy metals below the detection threshold. The conditions necessary for composting could be met only for the organic fraction coming from rural areas as demonstrated by a pH value of 6.9 and a moisture content of 46.5%. These data will be extended to all the urban and rural areas to design appropriate disposal and/or recovery plants with profitable economic interventions that will lead to a reduction in costs in the planning of the integrated solid waste management.

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Section: Introductionmentioning

confidence: 99%

Determination of Residual Municipal Solid Waste Composition from Rural and Urban Areas: A Step toward the Optimization of a Waste Management System for Efficient Material Recovery

Triassi,

De Simone,

Montuori

et al. 2023

Sustainability

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show abstract

“…307 (BRASIL, 2002) and the generation by type of material. The percentage of each class and material used in the system's database was based on previous research (TESSARO; SÁ; SCREMIN, 2012; LIMA; CABRAL, 2013; FARIAS; FUCALE; GUSMÃO, 2016;CÓRDOBA et al, 2019;ROSADO et al, 2019).…”

Section: Resultsmentioning

confidence: 99%

Computational system for the integrated management of construction and demolition waste

2022

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Knowledge of the qualitative and quantitative composition of waste is essentialin order to propose alternatives and strategies for construction and demolition waste (CDW) management. Tools to support the integrated management of CDW have been of great help in identifying the best management alternatives. This article aims to develop a computational system (software) which supports the integrated management of CDW for Brazilian municipalities. The software was divided into four stages: knowledge acquisition (data collection), system structuring (system tools), coding and validation, all based on a case study. In conclusion, the computational tool developed and tested with a robust database for managing CDW in municipalities makes it possible to identify better management alternatives, considering the different realities of each municipality and each construction project.

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“…Nevertheless, the effectiveness of implementing such practises in some developing countries is still very limited and will require in-depth assessment. It has been described by various researchers that the non-consistency of the C&DWM composition on different construction and demolition sites could yield different material characteristics (Cordoba et al, 2019;Bianchini et al, 2020). In addition, the heterogeneous composition of the CDW generates variable characteristics of the recycled aggregates, such as more sporadic shape, rougher surface, lower specific gravity, higher water absorption rate and lower mechanical behaviour (Malia et al, 2013;Cabral et al, 2010;Oliveira et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

A sustainable approach in using construction and demolition waste materials in concrete

Quedou¹,

Wirquin

Bokhoree

2021

WJE

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Purpose The purpose of this paper is to investigate the potential use of construction and demolition waste materials (C&DWM) as an alternative for natural fine aggregates (NFA), in view to solve the disposal problems caused due to landfills. In addition, to evaluate its suitability as a sustainable material, mechanical and durability properties have been performed on different proportions of concrete blending and the results recorded were compared with the reference concrete values. Design/methodology/approach In this research, the NFA were replaced at the proportion of 25%, 50%, 75% and 100% of C&DWM with a constant slump range of 130 mm–150 mm. This parameter will assess the consistency of the fresh concrete during transportation process. The characteristics of the end product was evaluated through various tests conducted on hardened concrete samples, namely, compressive strength, flexural strength, depth of penetration of water under pressure, rapid chloride penetration test, carbonation test and ultrasonic pulse velocity (UPV) test. All results recorded were compared with the reference concrete values. Findings The results demonstrated that the use of C&DWM in concrete portrayed prospective characteristics that could eventually change the concept of sustainable concrete. It was noted that the compressive and flexural strength decreased with the addition of C&DWM, but nevertheless, a continuous increase in strength was observed with an increase in curing period. Moreover, the increase in rapid chloride penetration and decrease in UPV over time period suggested that the concrete structure has improved in terms of compactness, thus giving rise to a less permeable concrete. The mechanical tests showed little discrepancies in the final results when compared to reference concrete. Therefore, it is opined that C&DWM can be used effectively in concrete. Originality/value This study explores the possible utilisation of C&DWM as a suitable surrogative materials in concrete in a practical perspective, where the slump parameter will be kept constant throughout the experimental process. Moreover, research on this method is very limited and is yet to be elaborated in-depth. This approach will encourage the use of C&DWM in the construction sector and in the same time minimise the disposal problems caused due to in landfills.

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Alternative construction and demolition (C&D) waste characterization method proposal

Cited by 15 publications

References 18 publications

Determination of Residual Municipal Solid Waste Composition from Rural and Urban Areas: A Step toward the Optimization of a Waste Management System for Efficient Material Recovery

Determination of Residual Municipal Solid Waste Composition from Rural and Urban Areas: A Step toward the Optimization of a Waste Management System for Efficient Material Recovery

Computational system for the integrated management of construction and demolition waste

A sustainable approach in using construction and demolition waste materials in concrete

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