Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Filter dust as filler in concrete - from laboratory to full scale
Environmental considerations have become important for the metallurgical industries worldwide. Recycling and use of industrial 'waste-products' is an attractive alternative to landfills. This practice reduces or eliminates potential pollution problems, conserves natural resources, saves energy and is also economically beneficial. However in order to be able to use these materials in other processes their properties have to be thoroughly characterised so that they are suitable for their planned purpose. Modern concrete, such as self-compacting concrete, needs supplementing filler material to increase the volume of its fluid phase and to bind excess water due to the large degree of particle dispersion. Sometimes the aggregates lack the necessary amount of fines and thus filler material has to be added. The use of crushed aggregates instead of natural sand and gravel gives a workability change of the concrete, which can be remedied by adding filler materials. This investigation has been made on a flue dust, collected in the smoke hood covering the tapping area at Tinfos Jernverk site in Kvinesdal, Norway, with the intention of using the material as filler in concrete. The materials effect on cement hydration, rate of reaction, shrinkage/expansion and concrete strength development has been investigated. The results show that the material has a slight retarding effect on the cement hydration. The rate of reaction and the strength development after 28 days of curing is normal. The shrinkage and expansion measurements after 91 days of curing are also normal. The conclusion of the investigation is that it is possible to use the filter dust as filler in concrete. Due to the positive results of the experiments conducted in laboratory scale, full scale mixing and casting of construction concrete containing filter dust was performed at Tinfos Jernverk site in Kvinesdal.
Filter dust as filler in concrete - from laboratory to full scale
Environmental considerations have become important for the metallurgical industries worldwide. Recycling and use of industrial 'waste-products' is an attractive alternative to landfills. This practice reduces or eliminates potential pollution problems, conserves natural resources, saves energy and is also economically beneficial. However in order to be able to use these materials in other processes their properties have to be thoroughly characterised so that they are suitable for their planned purpose. Modern concrete, such as self-compacting concrete, needs supplementing filler material to increase the volume of its fluid phase and to bind excess water due to the large degree of particle dispersion. Sometimes the aggregates lack the necessary amount of fines and thus filler material has to be added. The use of crushed aggregates instead of natural sand and gravel gives a workability change of the concrete, which can be remedied by adding filler materials. This investigation has been made on a flue dust, collected in the smoke hood covering the tapping area at Tinfos Jernverk site in Kvinesdal, Norway, with the intention of using the material as filler in concrete. The materials effect on cement hydration, rate of reaction, shrinkage/expansion and concrete strength development has been investigated. The results show that the material has a slight retarding effect on the cement hydration. The rate of reaction and the strength development after 28 days of curing is normal. The shrinkage and expansion measurements after 91 days of curing are also normal. The conclusion of the investigation is that it is possible to use the filter dust as filler in concrete. Due to the positive results of the experiments conducted in laboratory scale, full scale mixing and casting of construction concrete containing filter dust was performed at Tinfos Jernverk site in Kvinesdal.
Filter dust as filler in concrete - from laboratory to full scale
Filterstaub als Zuschlagstoff in Beton - vom Laborversuch zur industriellen Anwendung
Moosberg-Bustnes, H. (Autor:in) / Hunsbeth, L. (Autor:in)
2004
12 Seiten, 6 Bilder, 9 Tabellen, 4 Quellen
Aufsatz (Konferenz)
Englisch
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