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A platform for research: civil engineering, architecture and urbanism
This study deals with the influence of the new generation of waste materials produced in power plants in the installations with fluidized beds on the properties and chemical stability of cements containing this waste. The aim of this study was to examine cements based on two different Portland clinkers containing different amounts of C3A phase. Based on these two clinkers, the cements of the types CEM II/A and CEM II/B with additions of fluidized bed material coming from brown and black coal were prepared. The properties of the cements were compared with the properties of reference cements, type CEM I. It should be emphasised that the composition of all cements was calculated in such a way that the maximum acceptable amount of SO3 - 3.5 % - was not exceeded. These cements were prepared and examined. The main properties, including resistance to chemical corrosion, were studied. Sulphate resistance of cements was studied by measuring the changes of compressive and flexural strength of 25x25x100 mm bars made from standard mortars and kept in water and in corrosive environments. The 5 % Na2SO4 and MgSO4 water solutions were used as corrosive environments. The samples were cured in standard conditions and subjected to low pressure steam curing or autoclaving.
This study deals with the influence of the new generation of waste materials produced in power plants in the installations with fluidized beds on the properties and chemical stability of cements containing this waste. The aim of this study was to examine cements based on two different Portland clinkers containing different amounts of C3A phase. Based on these two clinkers, the cements of the types CEM II/A and CEM II/B with additions of fluidized bed material coming from brown and black coal were prepared. The properties of the cements were compared with the properties of reference cements, type CEM I. It should be emphasised that the composition of all cements was calculated in such a way that the maximum acceptable amount of SO3 - 3.5 % - was not exceeded. These cements were prepared and examined. The main properties, including resistance to chemical corrosion, were studied. Sulphate resistance of cements was studied by measuring the changes of compressive and flexural strength of 25x25x100 mm bars made from standard mortars and kept in water and in corrosive environments. The 5 % Na2SO4 and MgSO4 water solutions were used as corrosive environments. The samples were cured in standard conditions and subjected to low pressure steam curing or autoclaving.
The effect of curing on the sulphate resistance of cements containing ashes from fluidised bed combustion installations
Pytel, Z. (author)
2006
9 Seiten, 5 Bilder, 6 Tabellen, 14 Quellen
Conference paper
Storage medium
English
experimentelle Untersuchung , Tagungsbericht , Röntgenbeugung , Portlandzementklinker , Kohlenasche , Wirbelschichtfeuerung , Biegefestigkeit , Druckfestigkeit , Magnesiumsulfat , Natriumsulfat , Sulfatbeständigkeit , Säurekorrosion , Korrosionsbeständigkeit , spezifische Oberfläche , Wassergehalt , Hitzehärten , Wasserabbinden von Zement , Plastizität , Quarz , Calcit , Anhydrid , Kalk , Abfallverwertung
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