Bulk Composition Effects on Vitrification of Mixed Fine Construction–Demolition and Inorganic Solid Waste
Re-use of neglected and frequently landfilled wastes, including earthquake-generated rubble, can reduce the environmental impact of such waste materials, avoiding georesource exploitation, and potentially provide a source for new upcycling applications. Here, the fine fraction (<0.125 mm) of diff...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/13/11/1378 |
| _version_ | 1797458347202445312 |
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| author | Paola Stabile Ababekri Abudurahman Michael R. Carroll Eleonora Paris |
| author_facet | Paola Stabile Ababekri Abudurahman Michael R. Carroll Eleonora Paris |
| author_sort | Paola Stabile |
| collection | DOAJ |
| description | Re-use of neglected and frequently landfilled wastes, including earthquake-generated rubble, can reduce the environmental impact of such waste materials, avoiding georesource exploitation, and potentially provide a source for new upcycling applications. Here, the fine fraction (<0.125 mm) of different wastes was selected according to chemical composition (mostly silicate/oxide-rich materials), including construction and demolition waste (CDW), commercial glass, ceramic industry waste and incinerator bottom and fly ashes. Mixtures of these materials were used for vitrification experiments conducted at atmospheric pressure, 1200 °C, 8 h duration, preparing ten mixes containing 30 to 70 wt% of different waste materials added to a CDW starting material. X-ray powder diffraction and SEM/electron microprobe analyses show that the amorphous content (glass) varies from a maximum of 100 wt.% in products made of CDW with 70 wt.% added ceramic materials (e.g., roof tile) to a minimum of ~53 wt.% amorphous material when CDW was mixed with 30 wt.% brick powder. Mixtures of other waste materials (commercial glass, bottom/fly ash, ceramic waste) produced variable amounts of amorphous component, interpreted in terms of thermal minima in the CaO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> system. Lack crystallinity and characteristic microstructures of experimental products suggest that vitrification is a promising choice for rendering inert chemically complex waste materials like CDW for possible upcycling applications. |
| first_indexed | 2024-03-09T16:35:47Z |
| format | Article |
| id | doaj.art-f3e638c70d6648468591fd49daba8b61 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-09T16:35:47Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-f3e638c70d6648468591fd49daba8b612023-11-24T14:57:29ZengMDPI AGMinerals2075-163X2023-10-011311137810.3390/min13111378Bulk Composition Effects on Vitrification of Mixed Fine Construction–Demolition and Inorganic Solid WastePaola Stabile0Ababekri Abudurahman1Michael R. Carroll2Eleonora Paris3School of Science and Technology, University of Camerino, Via Gentile III da Varano, 62032 Camerino, ItalySchool of Science and Technology, University of Camerino, Via Gentile III da Varano, 62032 Camerino, ItalySchool of Science and Technology, University of Camerino, Via Gentile III da Varano, 62032 Camerino, ItalySchool of Science and Technology, University of Camerino, Via Gentile III da Varano, 62032 Camerino, ItalyRe-use of neglected and frequently landfilled wastes, including earthquake-generated rubble, can reduce the environmental impact of such waste materials, avoiding georesource exploitation, and potentially provide a source for new upcycling applications. Here, the fine fraction (<0.125 mm) of different wastes was selected according to chemical composition (mostly silicate/oxide-rich materials), including construction and demolition waste (CDW), commercial glass, ceramic industry waste and incinerator bottom and fly ashes. Mixtures of these materials were used for vitrification experiments conducted at atmospheric pressure, 1200 °C, 8 h duration, preparing ten mixes containing 30 to 70 wt% of different waste materials added to a CDW starting material. X-ray powder diffraction and SEM/electron microprobe analyses show that the amorphous content (glass) varies from a maximum of 100 wt.% in products made of CDW with 70 wt.% added ceramic materials (e.g., roof tile) to a minimum of ~53 wt.% amorphous material when CDW was mixed with 30 wt.% brick powder. Mixtures of other waste materials (commercial glass, bottom/fly ash, ceramic waste) produced variable amounts of amorphous component, interpreted in terms of thermal minima in the CaO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub> system. Lack crystallinity and characteristic microstructures of experimental products suggest that vitrification is a promising choice for rendering inert chemically complex waste materials like CDW for possible upcycling applications.https://www.mdpi.com/2075-163X/13/11/1378CDWfine fractionwaste mixesvitrificationmineralogy |
| spellingShingle | Paola Stabile Ababekri Abudurahman Michael R. Carroll Eleonora Paris Bulk Composition Effects on Vitrification of Mixed Fine Construction–Demolition and Inorganic Solid Waste Minerals CDW fine fraction waste mixes vitrification mineralogy |
| title | Bulk Composition Effects on Vitrification of Mixed Fine Construction–Demolition and Inorganic Solid Waste |
| title_full | Bulk Composition Effects on Vitrification of Mixed Fine Construction–Demolition and Inorganic Solid Waste |
| title_fullStr | Bulk Composition Effects on Vitrification of Mixed Fine Construction–Demolition and Inorganic Solid Waste |
| title_full_unstemmed | Bulk Composition Effects on Vitrification of Mixed Fine Construction–Demolition and Inorganic Solid Waste |
| title_short | Bulk Composition Effects on Vitrification of Mixed Fine Construction–Demolition and Inorganic Solid Waste |
| title_sort | bulk composition effects on vitrification of mixed fine construction demolition and inorganic solid waste |
| topic | CDW fine fraction waste mixes vitrification mineralogy |
| url | https://www.mdpi.com/2075-163X/13/11/1378 |
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