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National Repository of Grey Literature 62 records found  beginprevious60 - 62  jump to record: Search took 0.01 seconds. 
The effect of fly ash on the properties of cement mortars.
 Bayer, Petr ; Brandštetr, Jiří (referee) ; Šiler, Pavel (advisor)
The consumption of the cement for construction industries is increased every year. That is associated with greenhouse gas emissions, especially carbon dioxide CO2. Reduction of greenshouse gas emissions can be achieved by maximisation of the use of cementitious and pozzolanic by-products. As by-product could be used blast furnace slag and fly ash. My bachelor’s thesis is focused on the possibility of the partical replacement of the cement by fly ash. High temperature and fluidized fly ashes will be tested. The goal is to examine the behavior of the cement mortars in compensation of 10, 20, 40 and 60 % by weight of cement by fly ash. The compressive and flexural strength and isoperibolic calorimetry measurement were performed.
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The thermal properties of glasses for preparation of composites ceramic - glass
 Halasová, Martina ; Šiler, Pavel (referee) ; Havlica, Jaromír (advisor)
Results of DTA and TG methods and next thermal methods will be explored for evaluation of processes in temperature range up to temperature of softening for assessing of possibilities of application of glasses in composites ceramic-glass
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Composite cements with heat-convertible polymer - preparation and parameters
 Surman, František ; Šiler, Pavel (referee) ; Havlica, Jaromír (advisor)
This bachelor’s thesis deals with the preparation and study of composite material based on thermosetting polymer (phenol resin) and inorganic binder (high alumina cement). Very high mechanical properties, considerable stability to moisture and heat are specific properties of this polymer-cement composite. The special preparation means high-shear mixing, which depends resultant properties of composite to a considerable extent. Theoretical part reveals the reason of high achievements, which are typical for this polymer-cement composite but not for other type of inorganic binder used in this composite. This part furthermore studies chemical and physical processes, which occurs in composite mixture during processing and hardening, environmental durability and general applications of polymer modified cements. Practical part includes the laboratory preparation of phenol resin and the study of flexural strength of composite according to resin content in composite mixture. The flexural strength was measured by universal test machine Zwick Z010. Microstructure of material was observed by optical microscopy.
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