Working Paper Article Version 1 This version is not peer-reviewed

The Size Effect on Flexural Fracture of Polyolefin Fibre Reinforced Concrete

Version 1 : Received: 15 March 2019 / Approved: 18 March 2019 / Online: 18 March 2019 (10:36:28 CET)

A peer-reviewed article of this Preprint also exists.

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.

Journal reference: Appl. Sci. 2019, 9, 1762
DOI: 10.3390/app9091762

Abstract

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.

Subject Areas

polyolefin fibre reinforced concrete; fracture behaviour; size effect; bending tests

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