Environmental performance of construction and demolition waste management strategies for valorization of recycled coarse aggregate

Waskow, Régis Pereira; Maciel, Vinícius Gonçalves; Tubino, Rejane Maria Candiota; Passuello, Ana

doi:10.1016/j.jenvman.2021.113094

Cited by 22 publications

(7 citation statements)

References 33 publications

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“…Concrete and ceramic material waste are generally inert and low polluters; however, they occupy a large volume in landfills and have a strong impact on waste management in cities [11]. The crushing, treatment, and preparation of the waste to produce recycled aggregates is currently widespread [12]. In general, aggregates from CDW have a wide field of application in the production of masonry mortars, totally or partially replacing the natural aggregate [13].…”

Section: Of 17mentioning

confidence: 99%

Experimental Study with Plaster Mortars Made with Recycled Aggregate and Thermal Insulation Residues for Application in Building

2022

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The high demand for natural resources and increased industrial activity is driving the construction sector to search for new, more environmentally friendly materials. This research aims to analyse plaster mortars with the incorporation of construction and demolition waste (CDW) to move towards a more sustainable building sector. Three types of aggregates (natural, recycled concrete and recycled from ceramic walls) and two types of insulation waste (expanded polystyrene with graphite and mineral wool) have been added to the plaster matrix to evaluate its mechanical and physical properties and its suitability in the elaboration of prefabricated materials. The results show how plaster mortars made with recycled aggregates have higher mechanical resistance than conventional plaster without incorporating sand. The incorporation of crushed mineral wool residues improves the flexural strength of plaster mortars and their application in the execution of prefabricated panels. Likewise, the expanded polystyrene residues reduce the final density of mortars, improving their behaviour against water absorption and reducing the final thermal conductivity of plaster material.

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Section: Of 17mentioning

confidence: 99%

Experimental Study with Plaster Mortars Made with Recycled Aggregate and Thermal Insulation Residues for Application in Building

2022

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“…Construction and demolition wastes (CDWs) are one of the massive wastes produced in large quantities worldwide [1,2]. Each year, CDWs generation exceeds 3 billion tons worldwide, and the current situation indicates a trend for future increases [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…Current environmental policies intend to recycle and use CDWs as a substitution of natural aggregates in different fields. In general, the largest demand for natural aggregates, especially in civil engineering projects, leads to the high CO2 emissions during mining and depletion of virgin raw aggregates [1,11,12]. Indeed, the use of CDWs aggregates can contribute to a sustainable world and create a trade potential for recycled aggregates [1,5,[13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Assessing the Feasibility, Usability, and Durability of Recycled Construction and Demolition Waste in Road Construction in Morocco

NAIM

2024

Mediterranean Architectural Heritage

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Abstract. Growing concerns about environmental sustainability and increasingly restrictive waste management regulations have led to the use of construction and demolition wastes (CDWs) as recycled aggregates for civil engineering projects, such as construction and infrastructure development. In this context, this paper presents an experimental laboratory analysis of the technical and environmental properties of recycled aggregates obtained from selected CDWs, conforming to European standards. The technical evaluation encompassed composition tests, particle size distribution (granulometry), density, water absorption, shape, the Los Angeles test, and the Micro-Deval test. The environmental assessment focused on the presence of potential contaminants, such as PAHs (polycyclic aromatic hydrocarbons), PCBs (polychlorinated biphenyls), and BTEX (benzene, toluene, ethylbenzene, and xylene). The laboratory test results are discussed and compared with current requirements. The paper concludes with key findings and recommendations derived from this investigation.

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“…In general, the simplest resource-oriented mode of utilization is breaking the material after using it as filling [1] or isolating the broken recycled aggregate instead of the natural aggregate concrete [2]. When used as a filling material, waste concrete contains many impurities, which makes it difficult to treat and use.…”

Section: Introductionmentioning

confidence: 99%

Study on Preparation of Low Heat High Belite Clinker from Waste Mortar and Its Modification

Yang

Wang

et al. 2022

Materials

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In order to realize low energy consumption in cement and the recycling of solid waste, the phase composition and structure of waste mortar used to prepare a high belite cement clinker, instead of some other raw materials, have here been investigated, and the belite was activated by doping with SO3. The results show that a good high belite cement clinker can be obtained using waste mortar, limestone, coal gangue, iron powder, or iron correction raw materials combined at 1350 °C for half an hour. The addition of SO3 greatly increased the strength of the clinker in the early phase, and overall, the ratio of calcium to silicon in belite became higher, and more Al2O3 entered the belite; however, the generation of C3S was inhibited somewhat, and the content of C4AF also increased. This study offers guidance for the application of waste mortar and the activation of belite, which offers huge environmental and economic benefits.

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Environmental performance of construction and demolition waste management strategies for valorization of recycled coarse aggregate

Cited by 22 publications

References 33 publications

Experimental Study with Plaster Mortars Made with Recycled Aggregate and Thermal Insulation Residues for Application in Building

Experimental Study with Plaster Mortars Made with Recycled Aggregate and Thermal Insulation Residues for Application in Building

Assessing the Feasibility, Usability, and Durability of Recycled Construction and Demolition Waste in Road Construction in Morocco

Study on Preparation of Low Heat High Belite Clinker from Waste Mortar and Its Modification

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