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Primerjava natezne trdnosti in sprijemnosti z betonom med jekleno in bazaltno armaturo : diplomska naloga
Frank, Aljaž (Avtor), Saje, Drago (Mentor) Več o mentorju... Povezava se odpre v novem oknu

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Izvleček
V diplomski nalogi obravnavamo sprijemnost med bazaltnimi armaturnimi palicami s premerom 12 mm in betonom. Veljavni evropski standardi za projektiranje konstrukcij bazaltne armature še ne obravnavajo. Izvedemo natezni in izvlečni preizkus armaturnih palic. Pri laboratorijskem delu sledimo smernicam iz standarda SIST EN 10080:2005. Zaradi specifičnosti bazaltne armature preizkušance posebej pripravimo in prilagodimo izvedbo preizkusa. Natezni test izvajamo tako, da v čeljusti vpeto armaturno palico natezno obremenjujemo do pretrga. Pri izvlečnem preizkusu pa iz betonske kocke izvlečemo armaturno palico. V okviru eksperimentalnega dela preverjamo dve vrsti betona – običajno in visoko trdno. Za natezni preizkus pripravimo 3 vzorce, za test sprijemne trdnosti pa 6, po 3 za vsako vrsto betona. Rezultate lastnih preiskav nateznega in izvlečnega testa za bazaltno armaturo primerjamo z rezultati za jekleno armaturo, ki so objavljeni v diplomskih delih predhodnikov. Ugotovimo, da bazaltne palice prenesejo veliko večjo natezno napetost od jeklenih, a so krhek material. Izvlečni test pokaže, da se bazaltna armatura obnaša podobno kot jeklena. V primeru betona običajne trdnosti in bazaltne armature dosežemo večjo sprijemno trdnost kot v primeru običajnega betona in jeklene armature, v primeru betona visoke trdnosti pa je vrednost sprijemne trdnosti za bazaltno armaturo manjša kot za jekleno.

Jezik:Slovenski jezik
Ključne besede:beton običajne trdnosti, beton visoke trdnosti, bazaltna armatura, jeklena armatura, sprijemna trdnost, izvlečna trdnost, natezni test, izvlečni test
Vrsta gradiva:Diplomsko delo/naloga (mb11)
Tipologija:2.11 - Diplomsko delo
Organizacija:FGG - Fakulteta za gradbeništvo in geodezijo
Leto izida:2019
Založnik:A. Frank]
UDK:691.32(043.2)
COBISS.SI-ID:8966241 Povezava se odpre v novem oknu
Število ogledov:313
Število prenosov:140
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Sekundarni jezik

Jezik:Angleški jezik
Naslov:Comparison of tensile strength and the bond with concrete between steel and basalt rebars : graduation thesis
Izvleček:
The thesis addresses the bond strength between concrete and basalt rebars with a diameter of 12 mm in comparison with steel rebars. The existing European standards have not taken basalt rebars into consideration yet. Both the tensile test as well as the pull-out test were carried out in order to check the rebars. The laboratory activities were carried out following the SIST EN 10080:2005 standard. Since the used material has its own specifics, the test samples as well as the testing procedure were adjusted in advance. When it came to the tensile test, reinforcing bars were observed under the impact of the tensile load until they were torn. The reinforcing bars were pulled out of concrete cubes when it came to the pull-out test. Two different types of concrete were analysed – normal strength concrete and high strength concrete. There were three samples used in order to carry out the tensile test whereas the pull-out test was carried out using 6 samples – 3 samples per each type of concrete. The results of the tests that focused on analysing basalt rebars were compared to the results of the tests that focused on steel rebars. One can observe that the basalt reinforcement bars can bear a higher tensile stress. However, they represent a more fragile material. The pull-out test proves that the basalt rebars and steel rebars behave in a similar way. In the case of concrete of normal strength and basalt rebars, a higher bond strength is achieved than in the case of conventional concrete and steel rebars, and in the case of high strength concrete, the value of bond strength for basalt rebars is less than for steel.

Ključne besede:normal strength concrete, high strength concrete, basalt rebars, steel rebars, bond strehngth, tensile strength, tensile test, pull-out test

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