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From industrial waste to commercial products

To prepare suitable commercial products from waste materials for use in the building industry and water management.

Every year, millions of tons of industrial waste is produced worldwide. Resource recovery and reuse of waste materials have become very important within the past decade because of the increased number of environmental regulations that force minimised waste disposal. The utilisation of industrial waste or by-products is important for environmental protection and resource reuse worldwide. Industrial waste considered in this project is: - Blast furnace slag; this is a by-product from the smelting of iron ore or iron pellets with coke and a flux, such as limestone or dolomite. - Steel slag; this is a by-product from the processing of iron or scrap steel in a basic oxygen furnace or electric arc furnace. - Fly ash; the finely divided residue resulting from the combustion of ground or powdered coke, which is transported from the fire box through the boiler by flue gases. Vitrification of industrial waste into commercial glass and glass-ceramic products provides an alternative to waste treatment or land filling. Utilising industrial waste as raw material and producing commercially viable glass-ceramic products has significant economic and environmental benefits. The primary aim of the present project is to determine the experimental conditions for the development and optimisation of glass and glass-ceramics from waste metallurgical slag (blast furnace and steel slag) and fly ash intended for possible cladding, tiling and other applications. For this purpose, full characterisation of these three wastes will be carried out. The melting behaviours of the wastes with or without some additives will be measured. Nucleation and crystallisation heat treatments will be applied. Investigation will include characterisation of the materials, optimisation of compacting pressure, sintering temperature and the raw mixture composition, and synthesis of glass ceramic elements. Glass and glass-ceramics based on wastes can have different applications such as wall-covering panels, floor and roofs in industrial and public buildings, interior facing of containers for the chemical industry, and road surfacing. These glass-ceramics usually have attractive appearances similar to those of natural granites and marbles and are predicted to have service lives of 20 to 45 years, provided that they are not exposed to any intensive impact. Characterisation will take place for fly ash and slag in relation to their reactivity in concrete, energy, the microstructure of cement paste and their conditions for engineering application of the research. Investigations will be carried out into the effects of slag and fly ash on the hydration of the concrete and blended cement, and the alkali-aggregate reactions. Investigations will take place into the influence of certain types of activators on the hydration process of alkali-activated slag and kinetics of the hydration process, i.e. the change compressive strength. The following aim of the proposed research project is the possibility of building up dikes or embankments from EnviMIX material. This material will be made with use of selected industrial waste (slag, fly ash, etc.). The project supposes the elimination of negative influences that are related to liquidation of landscape stabilisation elements, especially soil erosion, high surface nutrient transport, floods and related undesirable impacts on the landscape - diversity change of permanent crops, mainly in surroundings of river systems and water reservoirs. One stabilising factor is the vegetative cover and its root system, which leads to innovation of soil state structure and contributes to a rise of water-bearing soil capacity and the embankment, i.e. higher resistance against erosion. Keywords: industrial wastes.
Acronym: 
INWASCOMP
Project ID: 
3 824
Start date: 
01-01-2007
Project Duration: 
48months
Project costs: 
1 510 000.00€
Technological Area: 
Recycling, Recovery
Market Area: 
Manufacture of Building Materials

Raising the productivity and competitiveness of European businesses through technology. Boosting national economies on the international market, and strengthening the basis for sustainable prosperity and employment.