Investigation of the possibility of the reutilization of some industrial wastes
| Autor: | Aleksandra Kostic-Pulek, S.R. Popov, J. Djinovic, Slobodanka Marinkovic |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2005 |
| Předmět: |
Ettringite
Gypsum Materials science 020209 energy 0211 other engineering and technologies Mineralogy 02 engineering and technology engineering.material 12. Responsible consumption law.invention lcsh:Chemistry chemistry.chemical_compound law 021105 building & construction 0202 electrical engineering electronic engineering information engineering Calcination Lime ettringite Atmospheric pressure Metallurgy General Chemistry Mass ratio nitrogypsum fly ash chemistry lcsh:QD1-999 Fly ash Bottom ash engineering FaL-G binder |
| Zdroj: | Journal of the Serbian Chemical Society, Vol 70, Iss 6, Pp 843-851 (2005) |
| ISSN: | 0352-5139 |
| Popis: | The utilization of nitrogypsum and bottom ash, wastes from the factory "Milan Blagojevi}" (Lu~ani-Serbia), was investigated. For this purpose, mixtures composed of calcined nitrogypsum (CaSO4 . 0.5H2O), ash (mass ratio 1:1) and water (water/solid mass ratio 0.5), as well as similar mixtures consisting of 1.0 mass % 5.0 mass % 10.0 mass % of lime (CaO) with the same gypsum/ash and water/solid mass ratios, were prepared. These mixtures gave solidified products at room temperature and atmospheric pressure, which after 28 days had satisfactory compressive strengths for application in the civil industry. The product with 5.0 mass % of added lime has the best mechanical characeristics. X-ray and qualitative IR analysis showed that this product mainly consisted of calcium sulphate dihydrate (CaSO4 . 2H2O) and carbonates, as well as a small quantity of ettringite (3CaO . Al2O3 . 3CaSO4 . 32H2O). |
| Databáze: | OpenAIRE |
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