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Open AccessArticle

The Size Effect on Flexural Fracture of Polyolefin Fibre-Reinforced Concrete

1
Departamento de Tecnología de la Edificación, E.T.S de Edificación, Universidad Politécnica de Madrid, Avda. Juan de Herrera, 6, 28040 Madrid, Spain
2
Departamento de Ingeniería Civil: Construcción, E.T.S de Ingenieros de Caminos, Canales y Puertos, Universidad Politécnica de Madrid, C/Profesor Aranguren, s/n, 28040 Madrid, Spain
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(9), 1762; https://doi.org/10.3390/app9091762
Received: 15 March 2019 / Revised: 12 April 2019 / Accepted: 20 April 2019 / Published: 28 April 2019
(This article belongs to the Special Issue Fiber-Reinforced Concrete)
The reinforcement of concrete by using polyolefin fibres may be considered in structural design to meet the requirements of the applicable code rules. 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. View Full-Text
Keywords: polyolefin fibre-reinforced concrete; fracture behaviour; size effect; bending tests polyolefin fibre-reinforced concrete; fracture behaviour; size effect; bending tests
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MDPI and ACS Style

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.

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