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Simple design of the improved soils to subgrade pavement
Hurtiš, Maroš ; Hýzl, Petr (referee) ; Stehlík, Dušan (advisor)
This bachelor thesis describes improvement of soils to subgrade pavement. It defines basic expressions, which we are taking in consideration by. Next we are talking about each parameter, which has to be included in final subsoil and which tests are suitable for these parameters. We are decribing California Bearing Ratio in detail and its test. This thesis study context between pH and CBR. Change between these two subjects is caused by addition of a binder. We are practically proving this causes in practical part of bachelor thesis.
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The leachability of metals from geopolymers using various leaching mediums
Bystrianska, Emília ; Beranová, Denisa (referee) ; Koplík, Jan (advisor)
The aim of this work is the comparison of the leachability of metal from AAM due to the use of various leaching mediums. The ability to stabilize 1 wt. % Pb2+ in alkali-activated matrices was compared using different leaching tests (ČSN EN 12457, HJ-T/299, TCLP). The concentration of metal content in leachate was determined by ICP-OES method. The matrices consisted of blast-furnace slag and high-temperature fly ash. Lead distribution in matrices was analyzed by SEM microscopy. Furthermore, the effect of mechanical strength and pH leachate on the lead concentration were examined.
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Effect of active ingredients to the activity of cementing compound with non-alkaline accelerator additive for sprayed concrete.
Závacký, Jakub ; Hela,, Vlastimil (referee) ; Hela, Rudolf (advisor)
The bachelor thesis deals with the problems of the sprayed concrete with the focus on usage of the active ingredients with non-alkaline accelerator additive. The theoretical part covers the current level of knowledge of how the active ingredients are used in the sprayed concrete and their influence on the process of hydration. In the experimental part the reactivity of cementing compound with non-alkaline accelerator on the basis of aluminium sulphate were compared in a laboratory when the active ingredients (such as slag, fly-ash and very fine limestone) were used. The cements CEM I 42,5 R, made by different producers were verified on the basis of the setting time and early strength gain using the Vicat needle to examine the mechanical properties after 6 and 24 hours.
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Effect of active ingredients to the activity of cementing compound with non-alkaline accelerator additive for sprayed concrete.
Závacký, Jakub ; Hela,, Vlastimil (referee) ; Hela, Rudolf (advisor)
The bachelor thesis deals with the problems of the sprayed concrete with the focus on usage of the active ingredients with non-alkaline accelerator additive. The theoretical part covers the current level of knowledge of how the active ingredients are used in the sprayed concrete and their influence on the process of hydration. In the experimental part the reactivity of cementing compound with non-alkaline accelerator on the basis of aluminium sulphate were compared in a laboratory when the active ingredients (such as slag, fly-ash and very fine limestone) were used. The cements CEM I 42,5 R, made by different producers were verified on the basis of the setting time and early strength gain using the Vicat needle to examine the mechanical properties after 6 and 24 hours.
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The leachability of metals from geopolymers using various leaching mediums
Bystrianska, Emília ; Beranová, Denisa (referee) ; Koplík, Jan (advisor)
The aim of this work is the comparison of the leachability of metal from AAM due to the use of various leaching mediums. The ability to stabilize 1 wt. % Pb2+ in alkali-activated matrices was compared using different leaching tests (ČSN EN 12457, HJ-T/299, TCLP). The concentration of metal content in leachate was determined by ICP-OES method. The matrices consisted of blast-furnace slag and high-temperature fly ash. Lead distribution in matrices was analyzed by SEM microscopy. Furthermore, the effect of mechanical strength and pH leachate on the lead concentration were examined.
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|
Simple design of the improved soils to subgrade pavement
Hurtiš, Maroš ; Hýzl, Petr (referee) ; Stehlík, Dušan (advisor)
This bachelor thesis describes improvement of soils to subgrade pavement. It defines basic expressions, which we are taking in consideration by. Next we are talking about each parameter, which has to be included in final subsoil and which tests are suitable for these parameters. We are decribing California Bearing Ratio in detail and its test. This thesis study context between pH and CBR. Change between these two subjects is caused by addition of a binder. We are practically proving this causes in practical part of bachelor thesis.
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