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Statements

Subject Item
n2:RIV%2F68407700%3A21110%2F13%3A00207144%21RIV14-GA0-21110___
rdf:type
n7:Vysledek skos:Concept
dcterms:description
The utilisation of steel fibre reinforced concrete (SFRC) instead of traditional reinforced concrete (RC) for some structures can bring many advantages. All advantages are given by properties of SFRC, partly by strength properties, mainly by strain characteristics. An appropriate concrete structure for utilisation of SFRC can be tunnel lining generated from precast concrete segments. The loading of precast concrete segments, namely during installation of segments, leads often to mechanical damage of joints. The utilisation of SFRC for tunnel segments can reduce damage of joints, which is one of many advantages of the SFRC utilisation for tunnel segments. The main goal is to show approach to replacement of used material (i.e. approach from the design of concrete composition to results of experimental testing of key segment generated from SFRC without traditional rebars). Properties of SFRC were verified on standard samples. Uniaxial strength was veri-fied on cubes (150 mm), flexural strength was verified on beams (700 x 150 x 150 mm). Two dosages of steel fibres (50 kg/m3 and 70 kg/m3) together with two types of steel fibres (Dramix and Tri Treg) were verified by laboratory testing to achieve material stability during transport, tunnel lining installa-tion, and during its lifetime, mainly with regards to given thickness of segments 250 mm (construction of Prague metro line A extension). The utilisation of steel fibre reinforced concrete (SFRC) instead of traditional reinforced concrete (RC) for some structures can bring many advantages. All advantages are given by properties of SFRC, partly by strength properties, mainly by strain characteristics. An appropriate concrete structure for utilisation of SFRC can be tunnel lining generated from precast concrete segments. The loading of precast concrete segments, namely during installation of segments, leads often to mechanical damage of joints. The utilisation of SFRC for tunnel segments can reduce damage of joints, which is one of many advantages of the SFRC utilisation for tunnel segments. The main goal is to show approach to replacement of used material (i.e. approach from the design of concrete composition to results of experimental testing of key segment generated from SFRC without traditional rebars). Properties of SFRC were verified on standard samples. Uniaxial strength was veri-fied on cubes (150 mm), flexural strength was verified on beams (700 x 150 x 150 mm). Two dosages of steel fibres (50 kg/m3 and 70 kg/m3) together with two types of steel fibres (Dramix and Tri Treg) were verified by laboratory testing to achieve material stability during transport, tunnel lining installa-tion, and during its lifetime, mainly with regards to given thickness of segments 250 mm (construction of Prague metro line A extension).
dcterms:title
Laboratory testing of SFRC samples proposed for tunnel lining segments Laboratory testing of SFRC samples proposed for tunnel lining segments
skos:prefLabel
Laboratory testing of SFRC samples proposed for tunnel lining segments Laboratory testing of SFRC samples proposed for tunnel lining segments
skos:notation
RIV/68407700:21110/13:00207144!RIV14-GA0-21110___
n7:predkladatel
n8:orjk%3A21110
n3:aktivita
n17:P
n3:aktivity
P(GAP104/10/2023)
n3:dodaniDat
n10:2014
n3:domaciTvurceVysledku
n5:9499466 n5:9370781 n5:7715730 n5:7323883
n3:druhVysledku
n16:D
n3:duvernostUdaju
n22:S
n3:entitaPredkladatele
n13:predkladatel
n3:idSjednocenehoVysledku
84187
n3:idVysledku
RIV/68407700:21110/13:00207144
n3:jazykVysledku
n15:eng
n3:klicovaSlova
tunnel; segmental lining; steel fibre reinforced concrete; SFRC; experimental testing
n3:klicoveSlovo
n11:segmental%20lining n11:tunnel n11:steel%20fibre%20reinforced%20concrete n11:SFRC n11:experimental%20testing
n3:kontrolniKodProRIV
[59377240C665]
n3:mistoKonaniAkce
Praha
n3:mistoVydani
Praha
n3:nazevZdroje
Podzemní stavby 2013 - Proceedings
n3:obor
n19:JN
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
4
n3:projekt
n21:GAP104%2F10%2F2023
n3:rokUplatneniVysledku
n10:2013
n3:tvurceVysledku
Ráček, Václav Krátký, Jiří Vodička, Jan Hilar, Matouš
n3:typAkce
n12:EUR
n3:zahajeniAkce
2013-04-22+02:00
s:numberOfPages
5
n18:hasPublisher
Czech Tunnelling Association ITA-AITES
n20:isbn
978-80-260-3868-9
n6:organizacniJednotka
21110