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Neporušne metode merjenja lastnosti cementnih kompozitov : diplomska naloga
ID Maček, Gašper (Author), ID Jagličić, Zvonko (Mentor) More about this mentor... This link opens in a new window, ID Klun, Martin (Co-mentor)

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Abstract
Diplomska naloga obravnava nekatere neporušne metode spremljanja poteka hidratacije veziva v cementnih kompozitih v njihovi zgodnji starosti. V diplomski nalogi sta bila uporabljena dva merilna sistema. Prvi sistem za merjenje temperature in relativne vlage, je bil po meri razvit na Fakulteti za elektrotehniko, Univerza v Ljubljani, in ga lahko vgradimo v sveže cementne kompozite in s tem spremljamo časovno odvisnost omenjenih količin. Po meri razvit sistem smo primerjali z na trgu dostopnim sistemom ConSensor 2.0, s pomočjo katerega smo merili temperaturo in prevodnost cementnih kompozitov. Porušne in neporušne preizkuse ter meritve smo opravili na treh različnih mešanicah cementnih kompozitov in sicer na cementni pasti, malti in betonu. V prvem delu naloge obravnavamo proces hidratacije in teoretično ozadje merjenja električne prevodnosti cementnih kompozitov. V nadaljevanju pojasnimo delovanje obeh sistemov senzorjev ter pripravo posameznih mešanic, ki smo jih uporabili v preizkusih. V eksperimentalnem delu naloge primerjamo rezultate meritev temperature, električne prevodnosti in relativne vlažnosti med hidratacijo cementa, treh različnih cementnih kompozitov, opravljenih s sistemom ConSensor 2.0 ter z merskim sistemom razvitim po meri na Fakulteti za elektrotehniko. Izmerjene količine smo povezali s procesom hidratacije in preučevali povezavo s tlačno trdnostjo mladih cementnih kompozitov. Tlačna trdnost cementnih kompozitov je bila določena s standardnimi porušnimi metodami.

Language:Slovenian
Keywords:Neporušne metode, cementni kompoziti, porušne metode, proces hidratacije, temperatura, prevodnost, sistem ConSensor 2.0, razvit merski sistem senzorjev.
Work type:Bachelor thesis/paper (mb11)
Typology:2.11 - Undergraduate Thesis
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2019
Publisher:G. Maček]
PID:20.500.12556/RUL-108505 This link opens in a new window
UDC:624.04:691.54(043.2)
COBISS.SI-ID:8950625 This link opens in a new window
Publication date in RUL:05.07.2019
Views:858
Downloads:253
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Secondary language

Language:English
Title:Non-destructive methods for measuring the properties of cement composites : graduation thesis
Abstract:
Several non-destructive methods for monitoring the course of binder hydration process in cement composites (cement-based materials) at their early ages were discussed in the thesis. Two measurement systems were applied. The first was developed at the Faculty of Electrical Engineering, University of Ljubljana and is a custom made measurement system for measuring temperature and relative humidity. The sensors can be immersed into fresh cement composites for monitoring the time dependence of these quantities. The second system - ConSensor 2.0, is a commercially available system for measurements of temperature and electrical conductivity of cement composites. These non-destructive tests along with additional destructive methods were carried out on three different mixtures of cement composites, namely, cement paste, mortar and concrete. In the first part of the thesis we discuss the hydration process and the theoretical background of electrical conductivity measurements of cement composites. Next, the both sensor systems and the preparation methods of the mixtures of cement composites are described. In the experimental part, we compare the results of measurements of temperature, electrical conductivity and relative humidity during hydration process of three different cement composites with the ConSensor 2.0 system and the custom made system developed at the Faculty of Electrical Engineering. The measured quantities were related to the cement hydration process. Moreover, we studied the dependency of compressive strength of young cement composites to the measured quantities. The compressive strength of the cement composites was determined using standardized destructive test methods.

Keywords:Non-destructive methods, cement composites, destructive methods, hydration process, temperature, conductivity, ConSensor 2.0 system, custom made measurement system.

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