National Repository of Grey Literature 36 records found  beginprevious27 - 36  jump to record: Search took 0.01 seconds. 
The Effect of Humidity and Temperature on Stability of AFt phases
Janíčková, Zdeňka ; Dvořák, Karel (referee) ; Fridrichová, Marcela (advisor)
This thesis focused on the development of AFt phases such as ettringite and thaumasite, which is monitored in temperature and humidity environments. Depending on these factors is stability od the AFt phase and subsequent evaluation by X-ray diffraction analysis, DTA and REM monitored.
Synthetic Preparation and Properties of Ettringite
Vlachovský, David ; Kulísek, Karel (referee) ; Fridrichová, Marcela (advisor)
The work is focused on properties and behavior of ettringite in relation to external environment conditions. It concentrates on the mineralogical composition of ettringite prepared by the method of direct synthesis of aluminium sulphate octadecahydrate and calcium hydroxide at various humidities. Depending on these factors, the formation of ettringite and its possible conversion to other minerals was observed.
Behaviour of Ettringite in Different Humidity Conditions at Increased Temperature
Hučínová, Lenka ; Kulísek, Karel (referee) ; Fridrichová, Marcela (advisor)
This thesis focuses on the behaviour of ettringite as a highly watery material under varying external environment conditions. It deals with the development of ettringite at increased temperature and in different humidity conditions. Depending on these factors, both the stability of ettringite and its possible conversion to different minerals are monitored.
Thermodynamic Stability of Thaumasite
Pospíšilová, Klára ; Dvořák, Karel (referee) ; Fridrichová, Marcela (advisor)
This work deals with the resolution of the identification characteristics of the thaumasit, which falls into the same group of AFt phases as the mineral ettringit. Both of these stages have the same structural arrangement and the morphology. This work’s specific goal is the synthetic preparation of thaumasit in a variety of conditions and its evaluation.
Synthetic Preparation of Thaumasite
Skřeček, Miroslav ; Jiroušková, Kateřina (referee) ; Fridrichová, Marcela (advisor)
This thesis deals with problematic of thermodynamic stability of AFt phases. It is focused on studium of mineral thaumasite, mainly its possible ways of synthesis. Specific aim of the task is to prepare thaumasite by hydratation of mineral ternesite in optimal condition and consequential evalution by X-ray diffraction, DTA and SEM.
Monitoring the Development of AFt Phases in Mixed Portland Cement with FBC Ash
Martykán, Jiří ; Jiroušková, Kateřina (referee) ; Fridrichová, Marcela (advisor)
This diploma thesis is focused on evaluation of the possibilities of using FBC ash for production of blended cement and monitoring the hydration process, specially creation of the AFt phases.
Verification of the Thermodynamic Stability of Ettringite
Pekárková, Jana ; Jiroušková, Kateřina (referee) ; Fridrichová, Marcela (advisor)
The thesis deals with possibilities of FBC fly ash utilization for composite cements. It focuses on thermodynamic stability of ettringite, which is produced during composite cements hydration. Specific tasks are dedicated to observation of influence of outdoor environment and influence of calciumhydrosilicate environment to stability of ettringite.
Verification of the synthetic preparation of ettringite and thaumasite
Hrdina, Matěj ; Jiroušková, Kateřina (referee) ; Fridrichová, Marcela (advisor)
The work is focused on the possibilities of using FBC fly ash for composite cements, monitoring their hydration processes, especially the creation of AFt phase. The possibility of preparing synthetic ettringite and thaumasite and their detection.
Properties Modification of Portland Cements Oriented to Reduce CO2 Emissions
Rybová, Alexandra ; Jiroušková, Kateřina (referee) ; Fridrichová, Marcela (advisor)
The thesis is oriented on monitoring of hydration process of portland cement based on fluidized bed ash, firstly on investigation of AFt phases, mainly ettringite and thaumasite. Specific aim of the task is to prepare the scheme of these minerals synthetic preparation and to verify their laboratory preparation by different ways, using methods of RTG-diffraction analysis and scanning electron microscopy.
Making AFt Stages of Hydration of Cement Mixed with Fluidized Fly Ash
Skřeček, Miroslav ; Dvořák, Karel (referee) ; Fridrichová, Marcela (advisor)
The work focuses possibilities of using FBC ash for composite cements. This thesis is oriented on monitoring and making AFt stages of hydration of composite cements. It is oriented on laboratory preparing of synthetic ettringit and thaumasite.

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