Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Determination of size-independent specific fracture energy of normal- and high-strength self-compacting concrete from wedge splitting tests
Highlights Wedge splitting tests have been conducted on two different self-compacting concrete. SCC showed a lower size-independent fracture energy than similar vibrated concrete. The Young’s modulus of the self-compacting concrete mixes is higher. The higher proportion of fine particles decrease ductility of SCC concrete mixes.
Abstract Wedge splitting tests have been conducted on two different self-compacting concretes (normal- and high-strength) and the size-dependent fracture energy Gf determined from the measured RILEM work of fracture. Then the specific size-independent fracture energy, GF, has been determined using the boundary effect (BE) method of Hu and Wittmann and the simplified boundary effect (SBE) method proposed by Abdalla and Karihaloo. Tests on specimens of three different sizes and four different relative notch depths have shown that a unique value of GF can be obtained irrespective of the specimen size and relative notch depth. The results by both the BE and SBE methods are in very good agreement. A comparison with previous results from Abdalla and Karihaloo for normal- and high-strength vibrated concretes tested under the same conditions in the same laboratory shows that the SCC has a lower specific size-independent fracture energy than the vibrated concrete of the same strength.
Determination of size-independent specific fracture energy of normal- and high-strength self-compacting concrete from wedge splitting tests
Highlights Wedge splitting tests have been conducted on two different self-compacting concrete. SCC showed a lower size-independent fracture energy than similar vibrated concrete. The Young’s modulus of the self-compacting concrete mixes is higher. The higher proportion of fine particles decrease ductility of SCC concrete mixes.
Abstract Wedge splitting tests have been conducted on two different self-compacting concretes (normal- and high-strength) and the size-dependent fracture energy Gf determined from the measured RILEM work of fracture. Then the specific size-independent fracture energy, GF, has been determined using the boundary effect (BE) method of Hu and Wittmann and the simplified boundary effect (SBE) method proposed by Abdalla and Karihaloo. Tests on specimens of three different sizes and four different relative notch depths have shown that a unique value of GF can be obtained irrespective of the specimen size and relative notch depth. The results by both the BE and SBE methods are in very good agreement. A comparison with previous results from Abdalla and Karihaloo for normal- and high-strength vibrated concretes tested under the same conditions in the same laboratory shows that the SCC has a lower specific size-independent fracture energy than the vibrated concrete of the same strength.
Determination of size-independent specific fracture energy of normal- and high-strength self-compacting concrete from wedge splitting tests
Cifuentes, Héctor (Autor:in) / Karihaloo, Bhushan L. (Autor:in)
Construction and Building Materials ; 48 ; 548-553
21.07.2013
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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