Flowability of fibre-reinforced concrete and its effect on the mechanical properties of the material

Boulekbache, Bensaid; Hamrat, Mostefa; Chemrouk, Mohamed; Amziane, Sofiane

doi:10.1016/j.conbuildmat.2010.02.025

Cited by 308 publications

(130 citation statements)

References 20 publications

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“…This becomes more evident as the flow distance covered by the SFRC increases. Such observation is consistent with the experimental results obtained here and with other from the literature in which the flow is governed by extensional stresses [8,28,4].…”

Section: Fibre Distributionsupporting

confidence: 83%

Assessment of the fibre orientation factor in SFRC slabs

Blanco

Pujadas

Fuente

et al. 2015

Composites Part B: Engineering

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a b s t r a c tThe design of steel fibre reinforced concrete (SFRC) structures is evolving towards a new approach that uses correction factors to consider differences between the small-scale characterisation specimens and the real-scale elements. Recently, the Model Code 2010 proposed an orientation factor (K) that accounts for the effects of the orientation in the structural response of elements. The present study focuses on the identification of this factor in SFRC slabs with different dimensions. For that, flexural tests on real-scale slabs were conducted and the fibre orientation was assessed with an inductive method. A finite element analysis showed the differences between the experimental curves and the prediction of the Model Code without considering K. Based on the results obtained, a range of values is proposed for K and validated. This study sheds light on possible modifications that this philosophy of design might require to better reproduce the behaviour of slabs.

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Section: Fibre Distributionsupporting

confidence: 83%

Assessment of the fibre orientation factor in SFRC slabs

Blanco

Pujadas

Fuente

et al. 2015

Composites Part B: Engineering

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“…Many studies confirm that fibres are oriented in concrete due to and different factors [1,2,3], being the casting and compaction processes [4], the geometry and type of the fibres and the wall effect some of the more relevant; very fluid mixtures more susceptible and in self-compacting FRC it was proved the existence of significant flow effect [5,6,7,8,9]. The influence of these factors increases if thin elements are considered [10,11].…”

Section: Introductionmentioning

confidence: 89%

Vibrated and self-compacting fibre reinforced concrete: experimental investigation on the fibre orientation

Conforti

Plizzari

Zerbino

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. In addition to the fibre type and content, the residual properties of fibre reinforced concrete are influenced by fibre orientation. Consequently, the performance fibre reinforced concrete can be affected by its fresh properties (workability, flowing capacity) and by casting and compaction processes adopted. This paper focuses on the study of the orientation of steel or macro-synthetic fibres in two materials characterized by very different fresh properties: vibrated and self-compacting concrete. Four rectangular slabs 1800 mm long, 925 mm wide and 100 mm high were produced changing concrete and fibre type. From each slab, eighteen small prisms (550 mm long) were firstly cut either orthogonal or parallel to casting direction and, secondly, notched and tested in bending according to EN 14651. Experimental results showed that the toughness properties of a thin slab significantly varies both in vibrated and self-compacting concrete, even if in case of self-compacting concrete this variation resulted higher. Steel fibres led to greater variability of results compared to polymer one, underlining a different fibre orientation. A discussion on the relative residual capacity measured on the prisms sawn from the slabs and the parameters obtained from standard specimens is performed.

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“…Sivakumar and Manu Santhanam, 2007 [4]). It has also been demonstrated that the fibre distribution and orientation are important factors affecting properties of the fresh and hardened concrete, as proposed by Bensaid Boulekbache et al [5]. The glass fibre reinforced concrete has increasingly been used in architectural and structural concrete members thanks to its anticorrosive properties, combined with high strength exceeding that of steel fibres.…”

Section: Introductionmentioning

confidence: 93%

Utjecaj obloženih E-staklenih vlakana na svojstva čvrstoće betona

2016

JCE

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Test results obtained by studying the influence of epoxy coated E-glass fibre composites on the compressive and splitting tensile strengths of concrete are reported in the paper. Three grades of concrete and varying fibre volume fractions (0.5 %, 1 %, 1.5 % and 2 %) were used as test variables. It was observed that the maximum compressive strength was attained for the fibre volume fraction of 1.5%, whereas the splitting tensile strength was found to increase with an increase in the fibre volume fraction. Based on the test results, a mathematical model was developed using regression analysis. Utjecaj obloženih E-staklenih vlakana na svojstva čvrstoće betona U radu su prikazani rezultati ispitivanja o utjecaju E-staklenih vlakana obloženih epoksidom na tlačnu i vlačnu čvrstoću betona. Kao parametri ispitivanja su odabrana tri različita razreda betona s varirajućim volumnim udjelima vlakana (0,5 %, 1 %, 1,5 % i 2 %). Uočeno je da se najveća tlačna čvrstoća postiže pri volumnom udjelu vlakana od 1,5 %, a vlačna čvrstoća cijepanjem povećava se kako se povećava volumni udio vlakana. Na temelju rezultata ispitivanja razvijen je matematički model primjenom metode regresijske analize. Einfluss beschichteter E-Glassfasern auf die Festigkeitseigenschaften von BetonIn dieser Arbeit werden Resultate von Untersuchungen zum Einfluss mit Epoxid beschichteter Glasfasern auf die Druck-und Zugfestigkeit von Beton dargestellt. Als Untersuchungsparameter wurden drei verschiedene Betonklassen mit verschiedenen Faservolumenanteilen (0,5 %, 1 %, 1,5 % und 2 %) gewählt. Es wurde festgestellt, dass die größte Druckfestigkeit bei einem Faservolumenanteil von 1,5% erzielt wird, während die Spaltzugfestigkeit mit dem Faservolumenanteil ansteigt. Aufgrund der experimentellen Resultate wurde aufgrund Methoden der Regressionsanalyse ein mathematisches Modell entwickelt.Ključne riječi:beschichtete Glasfasern, faserverstärker Beton, Faservolumenanteil, Druckfestigkeit, Spaltzugfestigkeit

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Flowability of fibre-reinforced concrete and its effect on the mechanical properties of the material

Cited by 308 publications

References 20 publications

Assessment of the fibre orientation factor in SFRC slabs

Assessment of the fibre orientation factor in SFRC slabs

Vibrated and self-compacting fibre reinforced concrete: experimental investigation on the fibre orientation

Utjecaj obloženih E-staklenih vlakana na svojstva čvrstoće betona

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