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Chemical wall clamp based on fast-setting geopolymeric binders
Novotný, Radoslav ; Kalina, Lukáš (referee) ; Šoukal, František (advisor)
The aim of this work is to develope fast-setting geopolymeric binders applicable in the chemical wall clamp. This clamping systems are big trend because of easy application, ability to transfer big forces and short setting time. Binders of this systems are based on polymeric resin. Their raw materials are expensive, toxic and flammable substances. Based on this consideration an anorganic fast-setting geopolymeric binder was developed. This binders consist of mixture of metakaolin and precipitated silica activated by potassium hydroxide. Binder were characterized by suitable analytic methods (XRD, SEM, DTA). The results of this metods were used for optimalization of binder properties.
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Setting control of alkali-activated systems
Komosná, Kateřina ; Novotný, Radoslav (referee) ; Kalina, Lukáš (advisor)
This thesis is focused on the possibilities of setting control of alkali-activated systems based on blast furnace slag. The aim of this work is finding the suitable retarder that most extends the time of setting and also preserves the mechanical properties of alkali-activated material. In experimental section were prepared samples of blast furnace slag, water glass, water and additives in various weight addition. Testing samples have undergone of flexural and compressive strength tests. Then the setting time was determined using the Vicat device. The samples were measured calorimetrically because of monitoring the setting process. Finally the mixtures were observed using scanning electron microscope for a closer view on the structure of samples and distribution of setting retarder.
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Interaction of Lanthanide trichlorides with the construction materials of a purification apparatus
Novotný, Radoslav ; Zmrzlý, Martin (referee) ; Richtera, Lukáš (advisor)
Lanthanide halides LnX3 are the base material for preparation a different compounds, but also the pure metals. Our faculty is used for the syntesis organometallic catalyst. This compounds are very sensitive to the presence of moisture and oxygen. Lanthanide halides are commercially available in anhydrous or hydrated form. This thesis is devided eight chapters and deals with matherial of the apparatus, which is designed to sublimation of anhydrous lanthanide halides. Initial chapters described the properties and preparation this substances. Following are on the sublimation and corrosion materials. In the last chapter is the skeleton sketch, layout and a availability parts of construction. The aim of this work was to create theoretical basis of construction aparatus and commissioning.
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