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A platform for research: civil engineering, architecture and urbanism
Valorization of construction and demolition (C&D) and industrial wastes through alkali activation
https://orcid.org/0000-0003-4252-1632
Highlights Waste co-valorization is in line with zero-waste and circular economy principles. Molar ratios in raw materials, such as SiO2/Al2O3 and SiO2/CaO affect process. Final products exhibit good strength and thermal properties.
Abstract In the present experimental study, the valorization of construction and demolition (C&D) and industrial wastes, namely ferronickel slag and red mud, through alkali activation is investigated. Specimens were produced by mixing various proportions of the raw materials with NaOH and sodium silicate solutions. The paste was cast in cubic metal moulds with an edge of 5cm, cured at 80°C for 24h and then aged for 7days at room temperature. The produced specimens were subjected to compressive strength testing. The effect of the molarity of the activating solution, the mineralogy of the raw materials and the ratios of SiO2/Al2O3 and SiO2/(Al2O3 +CaO) on the compressive strength of the final products was investigated. Also, the effect of high temperature heating (400–800°C) on the structural integrity of the produced specimens was assessed. The use of analytical techniques, namely X-ray diffraction, Thermogravimetric Analysis, Fourier Transform Infrared Spectroscopy and Scanning Electron Microscopy provided insights on the morphology, structure and thermal resistance of the produced specimens.
Valorization of construction and demolition (C&D) and industrial wastes through alkali activation
https://orcid.org/0000-0003-4252-1632
Highlights Waste co-valorization is in line with zero-waste and circular economy principles. Molar ratios in raw materials, such as SiO2/Al2O3 and SiO2/CaO affect process. Final products exhibit good strength and thermal properties.
Abstract In the present experimental study, the valorization of construction and demolition (C&D) and industrial wastes, namely ferronickel slag and red mud, through alkali activation is investigated. Specimens were produced by mixing various proportions of the raw materials with NaOH and sodium silicate solutions. The paste was cast in cubic metal moulds with an edge of 5cm, cured at 80°C for 24h and then aged for 7days at room temperature. The produced specimens were subjected to compressive strength testing. The effect of the molarity of the activating solution, the mineralogy of the raw materials and the ratios of SiO2/Al2O3 and SiO2/(Al2O3 +CaO) on the compressive strength of the final products was investigated. Also, the effect of high temperature heating (400–800°C) on the structural integrity of the produced specimens was assessed. The use of analytical techniques, namely X-ray diffraction, Thermogravimetric Analysis, Fourier Transform Infrared Spectroscopy and Scanning Electron Microscopy provided insights on the morphology, structure and thermal resistance of the produced specimens.
Valorization of construction and demolition (C&D) and industrial wastes through alkali activation
https://orcid.org/0000-0003-4252-1632
Highlights Waste co-valorization is in line with zero-waste and circular economy principles. Molar ratios in raw materials, such as SiO2/Al2O3 and SiO2/CaO affect process. Final products exhibit good strength and thermal properties.
Abstract In the present experimental study, the valorization of construction and demolition (C&D) and industrial wastes, namely ferronickel slag and red mud, through alkali activation is investigated. Specimens were produced by mixing various proportions of the raw materials with NaOH and sodium silicate solutions. The paste was cast in cubic metal moulds with an edge of 5cm, cured at 80°C for 24h and then aged for 7days at room temperature. The produced specimens were subjected to compressive strength testing. The effect of the molarity of the activating solution, the mineralogy of the raw materials and the ratios of SiO2/Al2O3 and SiO2/(Al2O3 +CaO) on the compressive strength of the final products was investigated. Also, the effect of high temperature heating (400–800°C) on the structural integrity of the produced specimens was assessed. The use of analytical techniques, namely X-ray diffraction, Thermogravimetric Analysis, Fourier Transform Infrared Spectroscopy and Scanning Electron Microscopy provided insights on the morphology, structure and thermal resistance of the produced specimens.
Valorization of construction and demolition (C&D) and industrial wastes through alkali activation
Zaharaki, Dimitra (author) / Galetakis, Michalis (author) / Komnitsas, Kostas (author)
Construction and Building Materials ; 121 ; 686-693
2016-06-14
8 pages
Article (Journal)
Electronic Resource
English
Valorization of construction and demolition (C&D) and industrial wastes through alkali activation
| Online Contents | 2016
Valorization of construction and demolition (C&D) and industrial wastes through alkali activation
| British Library Online Contents | 2016
Valorization of construction and demolition (C&D) and industrial wastes through alkali activation
| British Library Online Contents | 2016
Valorization of construction and demolition (C&D) and industrial wastes through alkali activation
| British Library Online Contents | 2016