Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Electrodialytically treated MSWI fly ash use in clay bricks
Fly ash from municipal solid waste incineration (MSWI) is classified as hazardous waste, due to high heavy metal and salt content. Thus, beneficial use is restricted, and the fly ash hazardousness should be reduced before testing reuse options. Electrodialytic treatment can remove heavy metals and soluble salts and be used to decontaminate MSWI fly ash. In Greenland, MSWI fly ash is stored at uncontrolled disposal sites, and a more sustainable solution for handling fly ash is needed. At the same time, most construction materials are imported from Europe to Greenland, and increased use of local materials would greatly benefit the circular economy in the area. In this study, it was investigated if local Greenlandic resources could have potential in brickmaking. Two different clays; a Danish clay (used commercially in brick production) and one Greenlandic (not used commercially) and raw and electrodialytically treated MSWI fly ash from Sisimiut, Greenland were used. Small clay discs with a 0, 10, 20 and 30 % substitution of clay by MSWI fly ash were fired at 1000ºC for 24h. Substituting clay with fly ash generally resulted in lower technical properties of the clay discs. From this initial screening, the clay discs with electrodialytically treated fly ash and Greenlandic clay showed the lowest porosity and water absorption, which could be beneficial for use as construction material in cold climates.
Electrodialytically treated MSWI fly ash use in clay bricks
Fly ash from municipal solid waste incineration (MSWI) is classified as hazardous waste, due to high heavy metal and salt content. Thus, beneficial use is restricted, and the fly ash hazardousness should be reduced before testing reuse options. Electrodialytic treatment can remove heavy metals and soluble salts and be used to decontaminate MSWI fly ash. In Greenland, MSWI fly ash is stored at uncontrolled disposal sites, and a more sustainable solution for handling fly ash is needed. At the same time, most construction materials are imported from Europe to Greenland, and increased use of local materials would greatly benefit the circular economy in the area. In this study, it was investigated if local Greenlandic resources could have potential in brickmaking. Two different clays; a Danish clay (used commercially in brick production) and one Greenlandic (not used commercially) and raw and electrodialytically treated MSWI fly ash from Sisimiut, Greenland were used. Small clay discs with a 0, 10, 20 and 30 % substitution of clay by MSWI fly ash were fired at 1000ºC for 24h. Substituting clay with fly ash generally resulted in lower technical properties of the clay discs. From this initial screening, the clay discs with electrodialytically treated fly ash and Greenlandic clay showed the lowest porosity and water absorption, which could be beneficial for use as construction material in cold climates.
Electrodialytically treated MSWI fly ash use in clay bricks
Skevi, Lorena (Autor:in) / Ottosen, Lisbeth M. (Autor:in) / Kirkelund, Gunvor Marie (Autor:in)
01.01.2019
Skevi , L , Ottosen , L M & Kirkelund , G M 2019 , Electrodialytically treated MSWI fly ash use in clay bricks . in Proceedings ICSBM 2019 : 2nd International Conference on Sustainable Building Materials . vol. 3 , 005 , pp. 37-50 , 2 nd International Conference of Sustainable Building Materials , Eindhoven , Netherlands , 12/08/2019 .
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Heavy metals , Secondary resources , SDG 8 - Decent Work and Economic Growth , /dk/atira/pure/sustainabledevelopmentgoals/sustainable_cities_and_communities , /dk/atira/pure/sustainabledevelopmentgoals/responsible_consumption_and_production , Circular economy , Ceramics , /dk/atira/pure/sustainabledevelopmentgoals/decent_work_and_economic_growth , SDG 12 - Responsible Consumption and Production , SDG 11 - Sustainable Cities and Communities , Arctic
DDC:
690
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