Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Alkali-activated composites based on slags from iron and steel metallurgy
The world production of slag from iron and steel industries per year reaches almost 50 000 kt, whereas approximately 12,000 kt per year is produced in Europe. Czech Republic ranks among the important producers of steel and pig iron in Europe (6.9 million ton of steel and 5.2 million ton of pig iron was produced in the year 2006) and thus approximately 1.2 million ton of steel slag and 1.9 million ton of blast furnace slag. Approximately 55 % of blast furnace slag production undergoes a granulation process and granulated blast furnace slag (GBFS) originates. A significant part of blast furnace slag is utilized for the production of aggregate. GBFS is commonly utilized in the cement industry for preparation of blended cement CEM II, CEM IIII and CEM V where cement clinker substitution by GBFS ranges from 6 to 95 wt %. Steel slag is more variable in chemical composition in comparison with granulated blast furnace slag. From this point of view the utilization of steel slag for inorganic binder preparation is more complicated. Slag with a high content of iron (ladles lag) is returned to the blast or steel furnace in the form of agglomeration charge. Another part of steel slag is utilized for production of dense synthetic aggregate. The majority of ladle slag production is stored in slag disposal areas without any profit. This paper deals with alkali activated slag from iron and steel production which can be used in the building industry. Products of alkali slag activation fulfil the role of inorganic binders.
Alkali-activated composites based on slags from iron and steel metallurgy
The world production of slag from iron and steel industries per year reaches almost 50 000 kt, whereas approximately 12,000 kt per year is produced in Europe. Czech Republic ranks among the important producers of steel and pig iron in Europe (6.9 million ton of steel and 5.2 million ton of pig iron was produced in the year 2006) and thus approximately 1.2 million ton of steel slag and 1.9 million ton of blast furnace slag. Approximately 55 % of blast furnace slag production undergoes a granulation process and granulated blast furnace slag (GBFS) originates. A significant part of blast furnace slag is utilized for the production of aggregate. GBFS is commonly utilized in the cement industry for preparation of blended cement CEM II, CEM IIII and CEM V where cement clinker substitution by GBFS ranges from 6 to 95 wt %. Steel slag is more variable in chemical composition in comparison with granulated blast furnace slag. From this point of view the utilization of steel slag for inorganic binder preparation is more complicated. Slag with a high content of iron (ladles lag) is returned to the blast or steel furnace in the form of agglomeration charge. Another part of steel slag is utilized for production of dense synthetic aggregate. The majority of ladle slag production is stored in slag disposal areas without any profit. This paper deals with alkali activated slag from iron and steel production which can be used in the building industry. Products of alkali slag activation fulfil the role of inorganic binders.
Alkali-activated composites based on slags from iron and steel metallurgy
Komposite mit alkalischer Anregung auf der Basis von Schlacken der Eisen- und Stahlindustrie
Vlcek, J. (Autor:in) / Tomkova, V. (Autor:in) / Babkova, P. (Autor:in) / Vavro, M. (Autor:in)
Metalurgija, Zagreb ; 48 ; 223-227
2009
5 Seiten, 3 Bilder, 4 Tabellen, 11 Quellen
Aufsatz (Zeitschrift)
Englisch
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