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Waste steel foundry dust as admixture in blended portland cement
The production of iron and steel is accompanied by the occurence of large quantities of secondary products (dust) containing predominantly iron oxides and, to a smaller extent, elementary iron too. Furthermore, the waste products also contain other heavy metals and, in particular, Zn and Pb which make a direct recycling of such raw materials impossible. This type of waste is mostly disposed of at waste disposal sites but such an approach is dangerous because of possible water leaching when heavy metals (Pb, Zn, Cr) may pass into solution. Blended Portland cements have so far been produced with admixture of slag, fly ash and other ingredients. The present paper surveys the results of the investigation into the properties of a new type of blended Portland cement containing waste steel foundry dust as admixture. The optimum way of preparation of this type of cement consists in the simultaneous milling of clinker, gypsum and waste steel foundry dust. The addition of the last component exerts an influence on the hydration of the blended cement.
Waste steel foundry dust as admixture in blended portland cement
The production of iron and steel is accompanied by the occurence of large quantities of secondary products (dust) containing predominantly iron oxides and, to a smaller extent, elementary iron too. Furthermore, the waste products also contain other heavy metals and, in particular, Zn and Pb which make a direct recycling of such raw materials impossible. This type of waste is mostly disposed of at waste disposal sites but such an approach is dangerous because of possible water leaching when heavy metals (Pb, Zn, Cr) may pass into solution. Blended Portland cements have so far been produced with admixture of slag, fly ash and other ingredients. The present paper surveys the results of the investigation into the properties of a new type of blended Portland cement containing waste steel foundry dust as admixture. The optimum way of preparation of this type of cement consists in the simultaneous milling of clinker, gypsum and waste steel foundry dust. The addition of the last component exerts an influence on the hydration of the blended cement.
Waste steel foundry dust as admixture in blended portland cement
Überschüssiger Staub aus Stahlgießereien als Beimischung in gemischtem Portlandzement
Skvara, F. (author) / Olsova, D. (author) / Kastanek, F. (author) / Perka, L. (author)
Ceramics Silikaty, Prag ; 48 ; 59-65
2004
7 Seiten, 15 Bilder, 2 Tabellen, 14 Quellen
Article (Journal)
Czech
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