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Development of new technology of sand autoclaved aerated concrete with using of secondary raw materials
Ondříčková, Pavlína ; Suchý, Peter (referee) ; Drochytka, Rostislav (advisor)
Autoclaved sand aerated concrete is a modern building material with high thermal insulation properties. Only sand is used as the primary silicate component of aerated concrete in the Czech Republic. For the more favourable economic and ecological properties of aerated concrete, the use of secondary raw materials is used in this work. The secondary raw materials examined included fluidized bed and fly ash, slag and glass recycled. The aerated concrete composite with secondary admixtures was developed under hydrothermal conditions of a laboratory autoclave for 7 and 12 hours at 190°C. From the secondary raw materials tested, a 10% glass recycler additive yielded the highest strength. Other additives that have a positive effect on mechanical properties include SAKO and Oslavany. From the results of the work it is evident that the use of secondary raw materials increases the strength, improves the rheology of the mixture and supports the formation of tobermorite.
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Design of belt grinder
Man, Lukáš ; Pavlík, Jan (referee) ; Knoflíček, Radek (advisor)
This Master’s thesis concerns the construction of Belt Grinder. The research part deals with types of designs used in Belt Grinders, grinding technology and analysis of grinding/sanding belts which are used for grinding. With use of qualitative methods as Fault Tree Analysis and Quality Function Deployment, the whole topic is taken apart in more detail, so the topic of Belt Grinder is easier to understand. In the next part of the work, the necessary parameters are calculated and then the construction of a Belt grinder for flat surfaces and rounded grinding are modeled. This is followed by a risk assessment analysis, including forms for estimating and subsequently proposing measures to reduce these risks. Part of the work is also the technical and economic evaluation and estimated costs for the implementation of proposed structure.
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Design of belt grinder
Man, Lukáš ; Pavlík, Jan (referee) ; Knoflíček, Radek (advisor)
This Master’s thesis concerns the construction of Belt Grinder. The research part deals with types of designs used in Belt Grinders, grinding technology and analysis of grinding/sanding belts which are used for grinding. With use of qualitative methods as Fault Tree Analysis and Quality Function Deployment, the whole topic is taken apart in more detail, so the topic of Belt Grinder is easier to understand. In the next part of the work, the necessary parameters are calculated and then the construction of a Belt grinder for flat surfaces and rounded grinding are modeled. This is followed by a risk assessment analysis, including forms for estimating and subsequently proposing measures to reduce these risks. Part of the work is also the technical and economic evaluation and estimated costs for the implementation of proposed structure.
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Development of new technology of sand autoclaved aerated concrete with using of secondary raw materials
Ondříčková, Pavlína ; Suchý, Peter (referee) ; Drochytka, Rostislav (advisor)
Autoclaved sand aerated concrete is a modern building material with high thermal insulation properties. Only sand is used as the primary silicate component of aerated concrete in the Czech Republic. For the more favourable economic and ecological properties of aerated concrete, the use of secondary raw materials is used in this work. The secondary raw materials examined included fluidized bed and fly ash, slag and glass recycled. The aerated concrete composite with secondary admixtures was developed under hydrothermal conditions of a laboratory autoclave for 7 and 12 hours at 190°C. From the secondary raw materials tested, a 10% glass recycler additive yielded the highest strength. Other additives that have a positive effect on mechanical properties include SAKO and Oslavany. From the results of the work it is evident that the use of secondary raw materials increases the strength, improves the rheology of the mixture and supports the formation of tobermorite.
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