Recycled Glass as Aggregate for Architectural Mortars

Tittarelli, Francesca; Giosuè, Chiara; Mobili, Alessandra

doi:10.1186/s40069-018-0290-3

Cited by 23 publications

(8 citation statements)

References 37 publications

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“…In this study, for an addition of 20 wt.% glass sand, the modulus of elasticity was about 3% higher than for the base mix. The same phenomenon was observed by Tittarelli et al [ 36 ], but for coarse glass aggregate. This may be due to the fact that the modulus of elasticity for glass is higher than sand [ 59 ].…”

Section: Resultssupporting

confidence: 87%

“…Kou and Poon [ 35 ] achieved a negative effect on bonding and a reduction in strength by using glass as a coarse aggregate in concrete. The same phenomenon was observed by Tittarelli et al [ 36 ]. According to Lee et al [ 37 ], the use of glass aggregates with a particle size of 2.36–5 mm or 5–10 mm in concrete causes alkali-silica reaction (ASR) expansion and the strength reduction.…”

Section: Introductionsupporting

confidence: 88%

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Effect of Waste Glass Addition as a Replacement for Fine Aggregate on Properties of Mortar

et al. 2020

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A responsible approach towards sustainable development requires the use of environmentally friendly, low-carbon, and energy-intensive materials. One positive way is to use glass waste as a replacement for fine natural aggregate. For this purpose, the effects of adding glass cullet to the mechanical properties of mortar were carried out. The glass aggregate made from recycled post-consumer waste glass (food, medicine, and cosmetics packaging, including mostly bottles), were used. This experimental work included four different contents of fine glass cullet (5, 10, 15, and 20 wt.% of fine aggregate). The compressive, flexural, and split tensile strengths were evaluated. Moreover, the modulus of elasticity and Poisson coefficient were determined. The addition of glass sand aggregate increases the mechanical properties of mortar. When comparing the strength, the obtained improvement in split tensile strength was the least affected. The obtained effect for the increased analysed properties of the glass sand aggregate content has been rarely reported. Moreover, it was determined that by increasing the recycled glass sand aggregate content, the density of mortar decreased. In addition, the relationships between the properties for mortar containing glass sand aggregate were observed.

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Section: Resultssupporting

confidence: 87%

Section: Introductionsupporting

confidence: 88%

Effect of Waste Glass Addition as a Replacement for Fine Aggregate on Properties of Mortar

et al. 2020

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“…Yu et al [ 62 ] reported that the glass cullet used as aggregate in concrete enhanced its mechanical properties. Limbachiya et al [ 63 ] and Tittarelli et al [ 64 ], however, obtained the same mechanical performances for concrete mixes with addition of glass sand up to 15%. It was found that the use of glass cullet as replacement for coarse aggregate is not satisfactory owing to the reduction of the bonding between the aggregate and the cement matrix, and a reduction of strength [ 65 ].…”

Section: Introductionmentioning

confidence: 88%

Physical and Mechanical Properties of Polypropylene Fibre-Reinforced Cement–Glass Composite

et al. 2021

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In accordance with the principles of sustainable development, environmentally friendly, low-emission, and energy-intensive materials and technologies, as well as waste management, should be used. Concrete production is responsible for significant energy consumption and CO2 production; therefore, it is necessary to look for new solutions in which components are replaced by other materials, preferably recycled. A positive way is to use glass waste. In order to determine the effect of a significant glass cullet content on the properties of concrete, glass powder was used as a filler and 100% glass aggregate. The cement–glass composite has low tensile strength and brittle failure. In order to improve tensile strength, the effects of adding polypropylene fibres on the mechanical properties of the composite were investigated. With the addition of 300, 600, 900, 1200, and 1500 g/m3 of fibres, which corresponds to 0.0625%, 0.1250%, 0.1875%, 0.2500%, and 0.3125% of cement mass, respectively, flexural strength increased compared with the base sample by 4.1%, 8.2%, 14.3%, 20.4%, and 26.5%, respectively, while the increase in splitting strength was 35%, 45%, 115%, 135%, and 185%, respectively. Moreover, with the addition of fibres, a decrease in slump by 25.9%, 39.7%, 48.3%, 56.9%, and 65.5%, respectively, compared with the reference specimen was determined.

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“…The glass used for LCD panels is generally alkali-free; nevertheless, the content of alkali was assessed and had a very low result (Ca 68.9, Na 28.5, K 4.2, and Mg 0.5 mg/kg as reported by Ruello et al [24]). In any case, concerning the risk of an alkali-silica reaction (ASR), it is possible to fully replace traditional calcareous gravel with waste glass as recycled aggregate for the production of mortars, without any particular addition or admixture when glass is finely grinded, as in this case [24,37]. Preliminary washing removes sulphate from the scraps, and they are mixed with water, Portland cement, sand and lime, or calcium carbonate to produce mortars with different qualities [24].…”

Section: Methodsmentioning

confidence: 99%

End-of-Life Liquid Crystal Display Recovery: Toward a Zero-Waste Approach

et al. 2019

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End-of-life liquid crystal displays (LCD) represent a possible source of secondary raw materials, mainly glass and an optoelectronic film composed of indium (90%) and tin (10%) oxides. A strong interest for indium, classified as critical raw material, pushed research towards the development of high-efficiency recycling processes. Nevertheless, a deepened study of the technological innovation highlighted that only a small number of treatments included use of whole waste. Furthermore, these processes often need high temperatures, long times, and raw materials that have a significant environmental impact. In this context, this article shows an approach developed in accordance with the “zero waste” principles for whole, end-of-life LCD panel recycling. This process includes preliminary grinding, followed by cross-current acid leaching and indium recovery by zinc cementation, with efficiencies greater than 90%. A recirculation system further increases sustainability of the process. To enhance all waste fractions, glass cullets from leaching are used for concrete production, avoiding their disposal in landfill sites. Considering the achieved efficiencies, combined the simple design suitable for real-scale application (as confirmed by the related patent pending), this process represents an excellent example of implementing circular economy pillars.

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Recycled Glass as Aggregate for Architectural Mortars

Cited by 23 publications

References 37 publications

Effect of Waste Glass Addition as a Replacement for Fine Aggregate on Properties of Mortar

Effect of Waste Glass Addition as a Replacement for Fine Aggregate on Properties of Mortar

Physical and Mechanical Properties of Polypropylene Fibre-Reinforced Cement–Glass Composite

End-of-Life Liquid Crystal Display Recovery: Toward a Zero-Waste Approach

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