Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Use of fluidized bed combustion ash and other industrial wastes as raw materials for the manufacture of calcium sulphoaluminate cements
Calcium sulphoaluminate cements, mainly composed by 4CaO-3Al2O3-SO3 and 2CaOSiO2, are special hydraulic binders which require limestone, bauxite and gypsum as natural raw materials for their manufacture. In order to save bauxite and natural gypsum, it has been explored the possibility of using, among the raw mix components, FBC waste together with pulverised coal fly ash or anodization mud and, when necessary, flue gas desulphurization gypsum. Mixtures containing limestone (29 - 39%), FBC waste (30 - 44%), pulverised coal fly ash (0 - 13%) or anodization mud (0 - 32%), bauxite (0 - 18%) and flue gas desulphurization gypsum (0 - 8%) were heated for 2 hours in a laboratory electric oven at temperatures ranging from 1150 to 1300 deg C. The X-ray diffraction patterns on the burnt products generally showed a good conversion of the reactants and a high selectivity degree towards 4CaO-3Al2O3-SO3, particularly at 1250 deg C.
Use of fluidized bed combustion ash and other industrial wastes as raw materials for the manufacture of calcium sulphoaluminate cements
Calcium sulphoaluminate cements, mainly composed by 4CaO-3Al2O3-SO3 and 2CaOSiO2, are special hydraulic binders which require limestone, bauxite and gypsum as natural raw materials for their manufacture. In order to save bauxite and natural gypsum, it has been explored the possibility of using, among the raw mix components, FBC waste together with pulverised coal fly ash or anodization mud and, when necessary, flue gas desulphurization gypsum. Mixtures containing limestone (29 - 39%), FBC waste (30 - 44%), pulverised coal fly ash (0 - 13%) or anodization mud (0 - 32%), bauxite (0 - 18%) and flue gas desulphurization gypsum (0 - 8%) were heated for 2 hours in a laboratory electric oven at temperatures ranging from 1150 to 1300 deg C. The X-ray diffraction patterns on the burnt products generally showed a good conversion of the reactants and a high selectivity degree towards 4CaO-3Al2O3-SO3, particularly at 1250 deg C.
Use of fluidized bed combustion ash and other industrial wastes as raw materials for the manufacture of calcium sulphoaluminate cements
Einsatz von Wirbelschichtverbrennungsasche und anderer Industrieabfälle als Rohstoffe für die Herstellung von Calciumsulfoaluminat-Zementen
Marroccoli, M. (Autor:in) / Montagnaro, F. (Autor:in) / Pace, M.L. (Autor:in) / Telesca, A. (Autor:in) / Valenti, G.L. (Autor:in)
2009
6 Seiten, 6 Bilder, 3 Tabellen, 24 Quellen
Aufsatz (Konferenz)
Englisch
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