Podrobnosti záznamu

Název
    Behaviour of concrete in tunels and undeground concstructions in case of fire
Autor
    Bodnárová, L.
    Sitek, Libor
    Válek, J.
Konference
    5th International Colloquium on Geomechanics and Geophysics (24.06.2014-27.06.2014 : Ostravice, Karolínka, Česká republika)
Jazyk
    anglicky
Typ dokumentu
    abstrakt
Zdrojový dokument - monografie
    5th International Colloquium on Geomechanics and Geophysics. GECO 2014. 5
Strany
    S. 85-86
Poznámky
    Autoři celkem: 3
    Rozsah: 2 s. : P
Předmětová kategorie
    concrete
    fire
    high temperature
    tunnel
Klíčové slovo
    Behaviour
    Case
    Concrete
    Concstructions
    Fire
    Tunels
    Undeground
Abstrakt (anglicky)
   The problem of cement concrete resistance to high temperatures became topical after more frequent car accidents, heavy good vehicles in particular, in tunnels with an outbreak of fire as a result of an accident. Tunnel lining is exposed to intensive temperature released as a result of fire with the temperatures high above 1000 ˚C. The inner part of lining is exposed to various temperature intensities depending on the distance from the fire. Owing to water steam expansion in concrete as a result of temperature-time exposure, concrete surface is cracking and concrete layers are peeled off from various depths and thus the lining is secondary damaged. Appropriate composition of concrete, selection of binder of cement composite material and selection aggregate, additions and/or adding dispersed polypropylene fiber reinforcement can reduce destructive action of high temperature.
Přispěvatel
    AV ČR Brno, Ústav geoniky
Kód přispěvatele
    AV ČR, ÚG
Zdrojový formát
    U
Datum importu
    24. 10. 2014