magistrsko delo
Jure Klopčič (Avtor), Violeta Bokan-Bosiljkov (Mentor), Štefan Sobočan (Komentor)

Povzetek

V magistrski nalogi smo se ukvarjali z razvojem samozgoščevalnega betona iz lahkega agregata s predpisanimi lastnostmi, kot sta razred tlačne trdnosti in največja ciljna gostota betona. Pri določanju samozgoščevalnih lastnosti smo kot osnovno orodje uporabili meritve reoloških lastnosti in izbiro optimalnega območja napetosti na meji tečenja in plastične viskoznosti. V prvem delu naloge prikazujemo lastnosti in specifikacije lahkega agregata in lahkoagregatnega betona. Te podatke smo pridobili na podlagi pregledane strokovne literature in standardov. V tem delu podajamo še nekatere splošne razlage o reologiji betona in modelih za opis tekočin ter predstavimo meritve z ultrazvokom in meritve toplotnega toka. Drugi del naloge, ki predstavlja jedro naloge, je obširnejši in je naravnan eksperimentalno. Najprej so prikazane preskusne metode in načini izvajanja preiskav ter izmerjene lastnosti materiala. Sledi analiza rezultatov meritev. Betonske mešanice smo razdelili v dve skupini. Najprej smo obravnavali preliminarne mešanice, ki so služile kot priprava za glavno skupino mešanic. Pri glavni skupini mešanic smo analizirali vpliv različnih parametrov na reološke lastnosti svežih cementnih kompozitov, kar prikazujemo z reografi. Nato smo izbrano betonsko mešanico vgradili v steno dimenzij 100 cm x 230cm x 6 cm. Homogenost vgrajenega betona smo ocenili z meritvami z ultrazvokom, njegovo izolativnost pa z meritvami toplotnega toka. Preiskave so bile opravljene v okviru sodelovanja s podjetjem, ki uporablja takšne betone v praksi.

Ključne besede

gradbeništvo;magistrska dela;samozgoščevalni lahkoagregatni beton;reologija;plastična viskoznost;napetost na meji tečenja;tlačna trdnost;prostorninska masa;

Podatki

Jezik: Slovenski jezik
Leto izida:
Tipologija: 2.09 - Magistrsko delo
Organizacija: UL FGG - Fakulteta za gradbeništvo in geodezijo
Založnik: [J. Klopčič]
UDK: 691.3(497.4)(043.3)
COBISS: 7323489 Povezava se bo odprla v novem oknu
Št. ogledov: 1537
Št. prenosov: 402
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Angleški jezik
Sekundarni naslov: Development of lightweight self-compacting concrete with declared properties
Sekundarni povzetek: The aim of the master thesis was to develop lightweight self-compacting concrete made of lightweight aggregate and with declared properties, such as compressive strength class and maximal target density. Self-compacting properties were determined by measuring rheological properties and selecting the optimum range of yield stresses and plastic viscosities as a result of these measurements. In the first part of the thesis properties and specifications of lightweight aggregate and lightweight concrete are given. The data were obtained using relevant literature and standards. Common explanations about rheology of concrete and models for the description of liquids are also given, along with presentation of ultrasound testing and thermal current measurements. The second part of the thesis, which is experimental, represents the main part of my work. First the used test methods are given and the testing protocols are described, with obtained results of the tests. After that the test results are analysed. Concrete mixtures were divided in two groups. Preliminary concrete mixtures were first tested in order to define the composition of the main group of the mixtures. For the main mixtures rheological properties were first measured for different influencing parameters and presented in the form of rheographs. Then selected mixture was used to cast a concrete wall of 100 cm x 230 cm x 6 cm. The homogeneity of concrete in the wall was evaluated using ultrasound testing. The thermal insulation properties of the concrete were evaluated using thermal flow measurements. The study was carried out in the framework of cooperation with an enterprise that uses such concretes in practice.
Sekundarne ključne besede: civil engineering;master of science thesis;lightweight self-compacting concrete;rheology;plastic viscosity;yield stress;compressive strength;density;
Vrsta datoteke: application/pdf
Vrsta dela (COBISS): Magistrsko delo/naloga
Komentar na gradivo: Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Strani: XVIII, 84 str.
ID: 9113584