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Analysis of volume changes of cement composites with respect to optimizing the dosage of fine components
Meruňka, Milan ; Ťažký, Tomáš (referee) ; Hela, Rudolf (advisor)
The diploma thesis deals with the determination of the influence of the maximum density of the cement matrix on the volume changes of concrete, the influence of different admixtures or their combinations on the development of hydration temperatures and on the water separation of concrete. The theoretical part describes the various types of volume changes of concrete, the effects of individual input components and mineral admixtures on water separation, hydration heat development and concrete microstructure. The experimental part is focused on monitoring not only the volume changes of concrete mixtures made using different types of admixtures or their suitable combination until the age of 60 days of maturation, but also the influence of their use on selected mechanical parameters of concrete such as compressive strength, concrete in its fresh state and monitoring changes in the microstructure from long-term aging mixtures.
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: Development of special high strength concrete with low volume changes
Meruňka, Milan ; Hela,, Vlastimil (referee) ; Hela, Rudolf (advisor)
The bachelor thesis deals with problems of volume changes of concrete, especially shrinkage of concrete. Types of concrete changes, causes, occurrences, and ways to eliminate them are described. The experimental part is focused on monitoring the volume changes of concrete within 28 days of maturing using a different type and dose of shrinkage reducing additions, a summary of cement pastes within 24 hours of mixing, the development of temperatures of the hydration temperatures of concrete and cement pastes.
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Effect of the Combination of Blast-Furnace Finely Ground Granulated Slag and Inert Admixtures on Physical-Mechanical Parameters of Concrete
Meruňka, Milan ; Hela, Rudolf
This paper deals with the combination of blast furnace finely ground granulated slag (VJMGS) in an optimal ratio with an inert admixture. The aim of this work is to verify the influence of the mutual combination of admixtures on the physical-mechanical parameters of the concrete mixture, specifically the compressive strength of concrete. The obtained results suggest that even with half the dose of VJMGS in the mixture it is possible to obtain very similar physical-mechanical parameters of concrete in comparison with the recipe containing only VJMGS, which can be advantageous not only from an economic point of view but also from an ecological point of view.
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Analysis of volume changes of cement composites with respect to optimizing the dosage of fine components
Meruňka, Milan ; Ťažký, Tomáš (referee) ; Hela, Rudolf (advisor)
The diploma thesis deals with the determination of the influence of the maximum density of the cement matrix on the volume changes of concrete, the influence of different admixtures or their combinations on the development of hydration temperatures and on the water separation of concrete. The theoretical part describes the various types of volume changes of concrete, the effects of individual input components and mineral admixtures on water separation, hydration heat development and concrete microstructure. The experimental part is focused on monitoring not only the volume changes of concrete mixtures made using different types of admixtures or their suitable combination until the age of 60 days of maturation, but also the influence of their use on selected mechanical parameters of concrete such as compressive strength, concrete in its fresh state and monitoring changes in the microstructure from long-term aging mixtures.
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|
: Development of special high strength concrete with low volume changes
Meruňka, Milan ; Hela,, Vlastimil (referee) ; Hela, Rudolf (advisor)
The bachelor thesis deals with problems of volume changes of concrete, especially shrinkage of concrete. Types of concrete changes, causes, occurrences, and ways to eliminate them are described. The experimental part is focused on monitoring the volume changes of concrete within 28 days of maturing using a different type and dose of shrinkage reducing additions, a summary of cement pastes within 24 hours of mixing, the development of temperatures of the hydration temperatures of concrete and cement pastes.
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