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master's thesis
Ispitivanje trajnosti mlaznih betona
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2014. urn:nbn:hr:149:416356
Bijelić, Milan
University of Zagreb
Faculty of Chemical Engineering and Technology

Institutional repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb

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Bijelić, M. (2014). Ispitivanje trajnosti mlaznih betona (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:416356

Bijelić, Milan. "Ispitivanje trajnosti mlaznih betona." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2014. https://urn.nsk.hr/urn:nbn:hr:149:416356

Bijelić, Milan. "Ispitivanje trajnosti mlaznih betona." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2014. https://urn.nsk.hr/urn:nbn:hr:149:416356

Bijelić, M. (2014). 'Ispitivanje trajnosti mlaznih betona', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 21 May 2024, https://urn.nsk.hr/urn:nbn:hr:149:416356

Bijelić M. Ispitivanje trajnosti mlaznih betona [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2014 [cited 2024 May 21] Available at: https://urn.nsk.hr/urn:nbn:hr:149:416356

M. Bijelić, "Ispitivanje trajnosti mlaznih betona", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2014. Available at: https://urn.nsk.hr/urn:nbn:hr:149:416356

Metadata
TitleIspitivanje trajnosti mlaznih betona
Title (english)Testing durability of shotcrete
AuthorMilan Bijelić
MentorNevenka Vrbos (mentor)
Committee memberNevenka Vrbos (predsjednik povjerenstva)
Committee memberMirela Leskovac (član povjerenstva)
Committee memberNeven Ukrainczyk (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2014-10-28, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Basic Technical Sciences
Materials
Abstract
Mlazni betoni su kompozitni materijali sa vrlo kratkim vremenom vezanja, od svega nekoliko minuta, te se u praksi koriste za sprječavanje prodora vode i stabilizaciju stijena pri izradi tunela. Od uobičajenih cementnih veziva razlikuju se po vrlo kratkom vremena vezanja i nanošenjem na površinu prskanjem u mlazu, tzv. torkretiranjem. U ovome radu istraživana je hidratacija Portland cementa (PC) i Portland cementa uz različite masene dodatke titanil sulfata (TiOSO4) odnosno komercijalnog proizvoda AS 301 kao aditiva za pripravu materijala (mlaznog betona) vrlo kratkog vremena vezanja. Utjecaj aditiva na kinetiku hidratacije praćen je in situ kalorimetrijski, te naknadnom analizom materijala rendgenskom difrakcijom. Pripravljeni materijali s dodatkom aditiva su volumno postojani (nisu skloni pojavi pukotina i pretjeranoj ekspanziji), a vrlo kratko vrijeme vezanja zadovoljava uvjet za ugradnju kompozita direktnim špricanjem. Najbolje tlačne čvrstoće postižu se s dodatkom 2% TiOSO4.
Abstract (english)
Shotcrete are composite materials with very short setting time of only a few minutes, and are used in practice to prevent water penetration and stabilization of rock in the preparation of the tunnel. A further peculiarity of this material, except for a very short time setting, is it's application to the surface by jet spraying, so-called concrete-gunning. In this work, hydration of Portland cement (PC) and Portland cement with various mass additions of titanyl sulfate (TiOSO4) or a comercial product AS 301 as an additive for the preparation of materials (shotcrete) with very short cure times has been investigated. The effect of additives on hydration kinetics was investigated in situ by calorimetry and powder X-ray diffraction of extracted material. The prepared materials have stable volumen evolution (no affinity towards cracking and expansive reactions), and very short setting times and thus satisfies the requirement for composite placement by jet spraying. Best compressive strengths are obtained with 2% of TiOSO4.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:416356
Study programmeTitle: Materials Science and Engineering - Graduate study
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsClosed access
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Created on2016-12-15 14:28:12