Reactivity of calcium sulphate binders for building materials
Reaktivita sufátovápenatých pojiv pro stavební materiály
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České vysoké učení technické v Praze
Czech Technical University in Prague
Czech Technical University in Prague
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V této diplomové práci se autor zaměřil na reaktivitu vedlejších energetických produktů vznikajících v elektrárnách při fluidním spalování uhlí. Zkoumání cílilo na fluidní úletový popílek, ložový popel a sulfátovápenaté pojivo Sorfix. V teoretické části jsou popsány vlastnosti portlandského cementu, zvláště pak jednotlivé slínkové minerály a průběh jejich hydratace. Jsou zde specifikovány popílky ze spalování uhlí, a to jak vysokoteplotní, tak fluidní se zaměřením na jejich vznik, složení a rozdíly mezi nimi. Část teoretické práce zahrnuje charakteristiku pojiva Sorfix, z čeho se skládá a jak funguje. Dále jsou zde popsány jednotlivé zkoušky pucolánové aktivity. Praktická část zahrnuje charakterizaci vstupních materiálů, obsahuje prvkové a fázové složení, měrný povrch, hustotu a granulometrii materiálů. Zkoušky pucolánové aktivity se pak zaměřují na Frattiniho test, test elektrické vodivosti a pevnostní index aktivity připravených těles s popílky a pojivem Sorfix. Na závěr jsou jednotlivé metody porovnány mezi sebou a jsou diskutovány kalibrační vztahy mezi jednotlivými metodami.
In this diploma thesis, the author focused on the reactivity of energy by-products generated in power plants during fluidized bed combustion of coal. The research was focused on fluidized bed combustion fly ash (FBC FA), fluidized bed combustion bottom ash (FBC BA) and solfo calcic binder Sorfix. The theoretical part describes the properties of Portland cement, especially the individual clinker minerals and the course of their hydration. There are specified ashes from coal combustion, both high temperature FA and FBC ash, focusing on their origin, composition and differences between them. Part of the theoretical work includes the characteristics of the Sorfix binder, what it consists of and how it works. Furthermore, individual tests of pozzolanic activity are described here. The practical part includes the characterization of input materials, contains elemental and phase composition, specific surface area, density and granulometry of materials. The pozzolanic activity tests focus on the Frattini test, the electrical conductivity test, and the strength activity index (SAI) of the prepared samples with FBC ashes and Sorfix binder. Finally, the individual methods are compared with each other and the calibration relationships between the individual methods are discussed.
In this diploma thesis, the author focused on the reactivity of energy by-products generated in power plants during fluidized bed combustion of coal. The research was focused on fluidized bed combustion fly ash (FBC FA), fluidized bed combustion bottom ash (FBC BA) and solfo calcic binder Sorfix. The theoretical part describes the properties of Portland cement, especially the individual clinker minerals and the course of their hydration. There are specified ashes from coal combustion, both high temperature FA and FBC ash, focusing on their origin, composition and differences between them. Part of the theoretical work includes the characteristics of the Sorfix binder, what it consists of and how it works. Furthermore, individual tests of pozzolanic activity are described here. The practical part includes the characterization of input materials, contains elemental and phase composition, specific surface area, density and granulometry of materials. The pozzolanic activity tests focus on the Frattini test, the electrical conductivity test, and the strength activity index (SAI) of the prepared samples with FBC ashes and Sorfix binder. Finally, the individual methods are compared with each other and the calibration relationships between the individual methods are discussed.