Uporaba ultrazvočne metode za določitev značilnih parametrov v procesu vezanja cementne paste

diplomska naloga

Rok Bregar (Author), Violeta Bokan-Bosiljkov (Mentor), Janko Logar (Thesis defence commission member), Gregor Trtnik (Co-mentor)

Abstract

Ta diplomska naloga analizira možnost uporabe novo razvite ultrazvočne metode v procesu vezanja cementne paste z analizo frekvenčnih spektrov. Obravnavano ultrazvočno metodo je razvil dr. Gregor Trtnik v sklopu doktorske disertacije. Cilj naloge je bil preveriti, ali je metoda primerna in dovolj natančna za preučevanje učinka različnih kemijskih in mineralnih dodatkov v cementni pasti na proces vezanja materiala pri različnih temperaturah okolice. V prvem delu naloge so opisani osnovni principi delovanja metode in način ovrednotenja podatkov, pridobljenih s posebno programsko opremo. V drugem delu naloge je predstavljena analiza medsebojno primerljivih cementnih mešanic, kjer analizirane morebitne razlike med posameznimi lastnostmi cementnih past različnih sestav. V zadnjem delu je predstavljena primerjava ultrazvočne metode z uveljavljenim, standardnim Vicatovim preizkusom, s katerim določamo začetek in konec vezanja cementne paste. Pokaže se primernost ultrazvočne metode za določanje začetka in konca vezanja cementne paste, hkrati pa tudi možnost nadaljnega razvoja metode za celostno analizo lastnosti cementnih materialov v svežem stanju.

Keywords

gradbeništvo;diplomska naloga;UNI;začetek vezanja;konec vezanja;cementna pasta;ultrazvočna metoda;frekvenca;amplituda;Vicatov preizkus;

Data

Language:	Slovenian
Year of publishing:	2015
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
Publisher:	[R. Bregar]
UDC:	691.54(043.2)
COBISS:	7980129
Views:	1786
Downloads:	570
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Application of ultrasound method to determine characteristic parameters of the cement setting process
Secondary abstract:	The graduation thesis shows the possibility of using ultrasound method for evaluation of the cement setting process with frequency spectrum analysis. This particular ultrasound method was developed by dr. Gregor Trtnik in scope of his doctoral dissertation. The main goal is to determine, if ultrasound method is suitable and accurate enough to study effects, that different chemical and mineral admixtures have on the setting process of cementitious materials. First part of the thesis describes basic principles of ultrasound method, equipment needed to perform the experiment, and presents solution to evaluate obtained data. Specially designed software was used to analyse key parameters of the cement setting process. This is followed by main part of the thesis, where are presented differences between key properties of different cement mixtures, detected with ultrasound method. Finally, we compare standardised Vicat test for determination of the cement setting process with newly developed ultrasound method. It is shown, that ultrasound method is better suited for evaluation of setting and hardening process of cementitious material. Additionally, ultrasound method has the potential to be expanded and used for determination of elastic dynamic properties of the cementitious material in real time.
Secondary keywords:	setting time;ultrasound method;Vicat test;frequency spectrum;amplitude;cementitious material;
File type:	application/pdf
Type (COBISS):	Bachelor thesis/paper
Thesis comment:	Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages:	X, 40 str.
ID:	9587937