Fracture behaviour of basalt and steel fibre reinforced concrete

• Autorzy: Kosior-Kazberuk M. , Krassowska J.

Warianty tytułu

PL

Zamiany parametrów mechaniki pękania betonów zawierających włókna bazaltowe i stalowe

• Języki publikacji: EN

Abstrakty

EN

The pre-peak and post-peak softening behaviour of fine grained concrete with steel fibres and basalt fibres were investigated. The load-crack mouth opening displacement and load-deflection relationships, obtained in three-point bending test for specimens with U-notches, were used to analyze the fracture behaviour as well as to calculate the fracture energy. The strength properties of concretes tested were also compared. The modification of fracture plots, recorded under load, indicated the capability of basalt fibres to resist crack propagation. The incorporation of steel fibres caused considerable increase in fracture energy resulting in much more ductile behaviour of concrete in comparison to basalt fibre concrete. The differences in fracture behaviour of both type fibre reinforced concretes were pointed out.

PL

Badano wpływ włókien bazaltowych i stalowych na podkrytyczne i pokrytyczne zachowanie się elementów próbnych z betonu drobnoziarnistego. Wykresy zależności obciążenie-rozwarcie wylotu karbu oraz zależności obciążenieugięcie, uzyskane w warunkach trójpunktowego zginania próbek beleczkowych z karbem typu U, wykorzystano do analizy zmian parametrów mechaniki pękania oraz obliczenia energii pękania. Porównano właściwości wytrzymałościowe badanych betonów. Wykazano, że beton zbrojony włóknami bazaltowymi charakteryzuje się zwiększoną odpornością na inicjację i propagację rys. Wprowadzenie włókien stalowych do betonu spowodowało znaczące zwiększenie energii pękania, a także zmianę charakteru materiału w kierunku bardziej ciągliwego w porównaniu do betonu z dodatkiem włókien bazaltowych. Wskazano istotne różnice charakterystyk pękania betonów z dodatkiem obu rodzajów włókien.

Słowa kluczowe

EN

concrete; basalt fibre; steel fibre; pre-peak and post-peak behaviour; fracture energy; residual flexural strength

PL

beton; włókno bazaltowe; włókno stalowe; zachowanie pre-peak i post-peak; energia pękania; resztkowa wytrzymałość na zginanie

• Wydawca: Oficyna Wydawnicza Politechniki Białostockiej
• Czasopismo: Budownictwo i Inżynieria Środowiska
• Rocznik: 2015
• Tom: Vol. 6, no. 2
• Strony: 73--80
• Opis fizyczny: Bibliogr. 31 poz., rys., tab.

Twórcy

autor

Kosior-Kazberuk M.

• Faculty of Civil and Environmental Engineering, Bialystok University of Technology, Wiejska 45E, 15-351 Bialystok, Poland

autor

Krassowska J.

• Faculty of Civil and Environmental Engineering, Bialystok University of Technology, Wiejska 45E, 15-351 Bialystok, Poland

Bibliografia

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