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Comparison of elastic moduli of building materials
Ballon, Marek ; Hubáček, Adam (referee) ; Brožovský, Jiří (advisor)
The bachelor thesis deals with the detection of static and dynamic elastic moduli of building materials, their comparison and overview of the relationships between them. Describes methods for the determination of static modulus of elasticity in the press loading and dynamic modulus of elasticity obtained by non-destructive methods, including ultrasonic pulse method and resonance method.
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Using fuzzy clustering in modelling of hardened concrete properties
Haluska, Lukáš ; Vymazal, Tomáš (referee) ; Misák, Petr (advisor)
Compressive strength is one of the most monitored parameter of hardened concrete and it is usually determinated by destructive testing. Non-destructive testing applied on existing constructions uses regression analysis to estimate compressive strength. High variability of outputs and eventually failure of necessary requirements for using regression analysis complicate these methods. The aim of this thesis is to show posibility of using fuzzy clustering in this topic and to compare outputs with classic methods.
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The Modulus of Elasticity of Air-Entrained and Non-Air-Entrained Concrete
Tichý, Aleš ; Misák, Petr (referee) ; Kocáb, Dalibor (advisor)
The bachelor thesis deals with the verification of the degree of influence of the air-entraining admixture on the modulus of elasticity of concrete. The experiment was carried out for these purposes. The values of static and dynamic modulus of elasticity were determined on drilled cores from concrete blocks of different mixtures. The magnitudes of dynamic modulus of elasticity were determined by using an ultrasonic pulse velocity method and a resonance method. The results are summarized in tabular and graphical form.
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The use of dynamic non-destructive methods for determining the strength of cement from cement plant Hranice
Procházková, Lenka ; Novosad, Petr (referee) ; Brožovský, Jiří (advisor)
Nondestructive testing methods are employed as a tool for evaluation of parameters of building materials, especially to ascertain strength properties and to determine alteration occured during durability tests. An ultrasonic pulse velocity method is one of the most used nondestructive methods. A resonance method is employed among the nondestructive methods less. The aim of this work is to establish the calibration relationships between parameters of nondestructive testing and compressive strength value and flexural tensile strength value, respectively. Moreover, applicability of the calibration relationships is also discussed.
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The Modulus of Elasticity of Air-Entrained and Non-Air-Entrained Concrete
Tichý, Aleš ; Misák, Petr (referee) ; Kocáb, Dalibor (advisor)
The bachelor thesis deals with the verification of the degree of influence of the air-entraining admixture on the modulus of elasticity of concrete. The experiment was carried out for these purposes. The values of static and dynamic modulus of elasticity were determined on drilled cores from concrete blocks of different mixtures. The magnitudes of dynamic modulus of elasticity were determined by using an ultrasonic pulse velocity method and a resonance method. The results are summarized in tabular and graphical form.
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The use of dynamic non-destructive methods for determining the strength of cement from cement plant Hranice
Procházková, Lenka ; Novosad, Petr (referee) ; Brožovský, Jiří (advisor)
Nondestructive testing methods are employed as a tool for evaluation of parameters of building materials, especially to ascertain strength properties and to determine alteration occured during durability tests. An ultrasonic pulse velocity method is one of the most used nondestructive methods. A resonance method is employed among the nondestructive methods less. The aim of this work is to establish the calibration relationships between parameters of nondestructive testing and compressive strength value and flexural tensile strength value, respectively. Moreover, applicability of the calibration relationships is also discussed.
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Using fuzzy clustering in modelling of hardened concrete properties
Haluska, Lukáš ; Vymazal, Tomáš (referee) ; Misák, Petr (advisor)
Compressive strength is one of the most monitored parameter of hardened concrete and it is usually determinated by destructive testing. Non-destructive testing applied on existing constructions uses regression analysis to estimate compressive strength. High variability of outputs and eventually failure of necessary requirements for using regression analysis complicate these methods. The aim of this thesis is to show posibility of using fuzzy clustering in this topic and to compare outputs with classic methods.
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