Use and assessment of “e-plastics” as recycled aggregates in cement mortar

Makri, Chrysanthi; Hahladakis, John Ν.; Gidarakos, Evangelos

doi:10.1016/j.jhazmat.2019.120776

Cited by 29 publications

(7 citation statements)

References 33 publications

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“…For plastics and polymers, which are two of the main industrial byproducts and home waste materials [2], various processes are being conducted to reuse and recycle them, such as mechanical recycling (secondary polymers are obtained through mechanical processes), chemical recycling (monomers are recovered to be employed as new virgin polymers or are transformed in other useful materials), and energy recovery (energy is obtained from the combustion of post-consumer plastics) [3][4][5][6][7]. Additionally, the introduction as fillers in other materials is becoming a possible solution for plastic and polymeric waste materials, especially in construction materials, with examples of reuse in various structural materials, such as concrete [8][9][10][11][12][13], mortars [14][15][16][17][18], bituminous materials for pavements [19][20][21][22][23][24][25][26][27][28][29][30], and gypsum [31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Economic Evaluation of the Use of Recycled Polyamide Powder in Masonry Mortars

et al. 2020

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Due to the considerable amount of waste plastics and polymers that are produced annually, the introduction of these waste products in construction materials is becoming a recurrent solution to recycle them. Among polymers, polyamide represents an important proportion of polymer waste. In this study, sustainable and lightweight mortars were designed and elaborated, substituting the aggregates by polyamide powder waste. Mortars were produced with various dosages of cement/aggregates, and the polyamide substitutions were 25, 50, 75, and 100% of the aggregates. The aim of this paper is to determine the density and the compressive strength of the manufactured mortars to observe the feasibility for being employed as masonry or rendering and plastering mortars. Results showed that with increasing polymer substitution, lower densities were achieved, ranging from 1850 to 790 kg/m3 in modified mortars. Mortars with densities below 1300 kg/m3 are cataloged as lightweight mortars. Furthermore, compressive strength also decreased with more polyamide substitution. Obtained values in recycled mortars were between 15.77 and 2.10 MPa, but the majority of the values (eight out of 12) were over 5 MPa. Additionally, an economic evaluation was performed, and it was observed that the use of waste polyamide implies an important cost reduction, apart from the advantage of not having to manage this waste material. Consequently, not only the mechanical properties of the new recycled materials were verified as well as its economic viability.

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Section: Introductionmentioning

confidence: 99%

Analysis and Economic Evaluation of the Use of Recycled Polyamide Powder in Masonry Mortars

et al. 2020

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“…The test results showed that 10% of e-plastic powder can be used in pavements along with the conventional bitumen for better strength. Makri et al [51] recovered ABS from plastic houses of liquid crystal display (LCD) screens for use as RPAs in cement mortar and obtained samples with appropriate physical properties. Kumar et al [52] showed the feasibility of using e-plastic (HIPS) as a partial replacement of coarse aggregates in concrete.…”

Section: Re-use Of E-plastics As Construction Materialsmentioning

confidence: 99%

Ecotoxicity of Plastics from Informal Waste Electric and Electronic Treatment and Recycling

Butturi

Marinelli

Gamberini

et al. 2020

Toxics

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Plastic materials account for about 20% of waste electrical and electronic equipment (WEEE). The recycling of this plastic fraction is a complex issue, heavily conditioned by the content of harmful additives, such as brominated flame retardants. Thus, the management and reprocessing of WEEE plastics pose environmental and human health concerns, mainly in developing countries, where informal recycling and disposal are practiced. The objective of this study was twofold. Firstly, it aimed to investigate some of the available options described in the literature for the re-use of WEEE plastic scraps in construction materials, a promising recycling route in the developing countries. Moreover, it presents an evaluation of the impact of these available end-of-life scenarios on the environment by means of the life cycle assessment (LCA) approach. In order to consider worker health and human and ecological risks, the LCA analysis focuses on ecotoxicity more than on climate change. The LCA evaluation confirmed that the plastic re-use in the construction sector has a lower toxicity impact on the environment and human health than common landfilling and incineration practices. It also shows that the unregulated handling and dismantling activities, as well as the re-use practices, contribute significantly to the impact of WEEE plastic treatments.

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“…Despite the large number of studies on the reuse of plastic wastes as aggregates in cementitious materials, only a few studies have focused on the styrenic materials encountered in WEEE, such as acrylonitrile-butadiene styrene (ABS) and high-impact polystyrene (HIPS) [4,22]. It can be noted that Makri et al [22] investigated the physical and mechanical properties of cement mortars, partially replaced with ABS-based aggregates from plastic housing of LCD screens. The replacement percentages used were 2.5%, 5%, 7.5%, 10% and 12.5% (the authors do not specify whether the replacement rate is by mass or by volume), while the water-to-cement (w/c) ratio was maintained constant at 0.5.…”

Section: Introductionmentioning

confidence: 99%

Compressive and Flexural Strengths of Mortars Containing ABS and WEEE Based Plastic Aggregates

Bitouri¹,

Didier

2022

Polymers

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The incorporation of plastic aggregates as a partial replacement of natural aggregates in cementitious materials is interesting in several ways. From a mechanical point of view, the partial substitution of sand with plastic aggregates could improve some properties (e.g., ductility, thermal insulation). This paper deals with the mechanical strength of mortars containing plastic aggregates as a partial replacement of sand. Part of the volume of sand in cement mortars is substituted with plastic aggregates which originate from WEEE (Waste from Electrical and Electronic Equipment) and consist of a mix of ABS (acrylonitrile-butadiene styrene), HIPS (high impact polystyrene) and PP (Polypropylene), or of monomaterial ABS from WEEE sorting. Three rates of replacement (by volume of sand) were tested: 10%, 15% and 30%. Mechanical tests were performed according to European standard EN196-1. The results show that compressive and flexural strength decrease with rate of replacement, but remain satisfactory for structural purposes. In addition, the density of mortar is reduced with the incorporation of plastic aggregates. The decrease of mechanical strength is mainly due to the weak bond between cement paste and plastic aggregates leading to the increase of porosity. Furthermore, it appears that mortars containing plastic aggregates could present a ductile rupture.

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Use and assessment of “e-plastics” as recycled aggregates in cement mortar

Cited by 29 publications

References 33 publications

Analysis and Economic Evaluation of the Use of Recycled Polyamide Powder in Masonry Mortars

Analysis and Economic Evaluation of the Use of Recycled Polyamide Powder in Masonry Mortars

Ecotoxicity of Plastics from Informal Waste Electric and Electronic Treatment and Recycling

Compressive and Flexural Strengths of Mortars Containing ABS and WEEE Based Plastic Aggregates

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