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Dimenzioniranje letaliških ploščadi in projektiranje betonov visokih zgodnjih trdnosti : magistrsko delo
Puš, Alja (Author), Bokan-Bosiljkov, Violeta (Mentor) More about this mentor... This link opens in a new window, Seljak, Sašo (Co-mentor)

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Abstract
Vozne površine na letališčih, ki jih uporabljajo zrakoplovi, predstavljajo pomemben del letališke infrastrukture. Zaradi same narave letalskega prometa so daljše zapore letališke infrastrukture in s tem prekinitve letalskih operacij nezaželene, zato je bistvenega pomena, da v času življenjske dobe ustrezajo kriterijem trajnosti. S pravilnim načrtovanjem zagotovimo, da je vozišče v svoji predvideni življenjski dobi funkcionalno in da brez potrebe po večjih sanacijah zagotavlja nemoteno izvajanje letalskih operacij. Pri obnovah dotrajanih ali poškodovanih voznih površin se tako srečujemo s težnjami po hitrem izvajanju del, ki zahtevajo posebno izbiro materiala, tehnologije gradnje in organizacije dela. Magistrska naloga v prvem delu zajema splošen pregled betonskih vozišč ter načrtovanja betonskih letaliških površin, s poudarkom na ploščadih, skladno s priporočili ameriške organizacije FAA (Federal Aviation Administration). V drugem delu podajamo rešitve za hitro in trajnostno gradnjo betonskih vozišč. Med sodobnejše pristope sodi uporaba betonov visokih zgodnjih trdnosti, kjer pospešen prirast trdnosti v zgodnjem obdobju strjevanja betonske mešanice dosežemo s posebnimi cementi ali pa z dodajanjem ustreznih kemijskih dodatkov. Poleg doseganja visokih zgodnjih trdnosti, mora beton izpolnjevati še zahteve, pogojene z agresivnimi vplivi okolja kot so temperaturne spremembe, zmrzovanje in tajanje v prisotnosti soli, izliv kerozina ter prisotnost sredstev za razledenitev letal. V ta namen sta bili razviti dve betonski mešanici, primerni za različni tehnologiji vgradnje. Lastnosti betona smo določili s preiskavami na svežem in strjenem betonu, in sicer z določanjem poseda in poroznosti na sveži betonski mešanici in s preiskavami tlačne in upogibne trdnosti ter linijsko mikroskopsko analizo za določitev karakteristik sistem vnesenih zračnih por v strjenem betonu.

Language:Slovenian
Keywords:Letališče, letališke vozne površine, betonska vozišča, dimenzioniranje, betoni visokih zgodnjih trdnosti
Work type:Master's thesis/paper (mb22)
Tipology:2.09 - Master's Thesis
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2019
Publisher:[A. Puš]
UDC:625.717:691.32(043.3)
COBISS.SI-ID:8770913 Link is opened in a new window
Views:162
Downloads:142
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Secondary language

Language:English
Title:Airport pavement design and design of high early strength concrete : master thesis
Abstract:
Airport pavements are one of the most essential parts of airport infrastructure. According to specific traffic patterns, closures of the airport pavements are more or less unacceptable due to major economical and logistic impacts. This is why construction of a durable pavement is so important. To provide the anticipated design life of the pavement, we have to design, construct and maintain pavements with precaution. When the design life of the airport pavement is exhausted or concrete pavement is damaged and it no longer provides its function, civil engineers are forced to use the methods of rapid construction. Rapid construction requires carefully selected materials, construction technology and organization of accompanying procedures. The first part of the master thesis represents general overview of concrete pavements and design of airport pavements, focused on aprons, according to FAA (Federal Aviation Administration). In the second part, some examples of rapid and durable construction are presented. One of modern approaches to rapid construction is the usage of high early strength concrete. Early strengths can be achieved by using proper cementitious materials or admixtures that accelerate hardening of concrete. Besides fulfilling high early strength requirements, concrete has to be resistant to aggressive environmental impacts, like temperature changes, freezing and thawing in the presence of melting salts and also leakage of kerosene and de-icing chemicals. Therefore, two different concrete mixtures were developed to fulfil the requirements of surface course concrete in the concrete slab, each one for different concrete placement method. Fresh concrete mixture characteristics were determined by slump test and air content test. Hardened concrete was tested for compression and bending strength. To prove freezing and thawing resistance of the concrete specimens, final air content was defined by linear microscopic analysis.

Keywords:Airport, airport pavements, concrete pavements, airport pavement design, high early strenght concrete

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