Picazo, Á.; Alberti, M.G.; Gálvez, J.C.; Enfedaque, A.; Vega, A.C. The Size Effect on Flexural Fracture of Polyolefin Fibre-Reinforced Concrete. Appl. Sci.2019, 9, 1762.
Picazo, Á.; Alberti, M.G.; Gálvez, J.C.; Enfedaque, A.; Vega, A.C. The Size Effect on Flexural Fracture of Polyolefin Fibre-Reinforced Concrete. Appl. Sci. 2019, 9, 1762.
The reinforcement of concrete by using polyolefin fibres may be considered in structural design to meet the requirements of the applicable code rules. In order to achieve a reliable use of such a composite material, use of full-scale real structures is needed. The conversion of lab testing data into real practice properties is challenging and significantly influenced by various aspects, among which the size effect is a key one. Given that the available literature does not report coinciding conclusions about such an effect on quasi-brittle materials reinforced with fibres, further research is justified. Therefore, this work studies the behaviour of notched beams with three proportional sizes by using self-compacting polyolefin reinforced concrete with a fibre volume fraction of 1.1%. Flexural testing was carried out according to the standard EN-14651, with the results revealing the existence of the size effect. In addition, a reduction of the residual strength identified in the larger specimens was observed in fracture surfaces with equal fibre content.
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