Cracking performance of SCC reinforced with recycled fibres – an experimental study

Groli, Giancarlo; Caldentey, Alejándro Pérez; Soto, Alejandro Giraldo

doi:10.1002/suco.201300008

Cited by 37 publications

(36 citation statements)

References 8 publications

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“…10(a) and (b). The influence of the addition of fibres is negligible for the columns reinforced with Ø25 rebars, which is in accordance with what was previously observed for the case of beams in pure bending [20]: the higher the reinforcement ratio, the smaller the contribution of fibres to the stiffness. Moreover, the influence of fibres on the stiffness of the section can be appreciated on the 12-30-XX series, although not in the 12-80-XX series.…”

Section: Stress In the Rebarssupporting

confidence: 90%

See 1 more Smart Citation

Serviceability performance of FRC columns under imposed displacements: An experimental study

Groli

Caldentey

Marchetto

et al. 2015

Engineering Structures

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Section: Stress In the Rebarssupporting

confidence: 90%

“…According to literature [18,19] it is not expected that the use of SCC has a large influence on the cracking behaviour. For further details on the material characteristics see [20]. Table 3 shows the results of cylinder compression and indirect tension (Brazilian) tests carried out at 7 and 28 days.…”

Section: Concrete and Frc Propertiesmentioning

confidence: 99%

Serviceability performance of FRC columns under imposed displacements: An experimental study

Groli

Caldentey

Marchetto

et al. 2015

Engineering Structures

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“…Therefore, conventional reinforcement cannot be replaced by fibres for the ULS, although better cracking behaviour can be achieved by the combined action of rebars and fibres. This has been experimentally demonstrated in previous research with industrial fibres ( Tan et al, Leutbecher et al, Vasanelli et al, Balázs et al) and, more recently, with fibres recycled from end‐of‐life tyres. The fib Model Code for Concrete Structures 2010 is the first normative reference that includes provisions for the cracking behaviour of elements reinforced with both rebars and fibres.…”

Section: Introductionmentioning

confidence: 74%

“…Another important benefit of the use of RSF is the environmental aspect. Considering the typical values of emitted CO 2 of 0.7 tonne per tonne of steel, 1 tonne per m 3 of concrete and 0.02 tonne per tonne of RSF, the reduction in CO 2 emissions for the tank wall can be quantified as 10 %.…”

Section: Water‐retaining Tank Wallmentioning

confidence: 99%

Improving cracking behaviour with recycled steel fibres targeting specific applications - analysis according to fib Model Code 2010

Groli

Caldentey

2017

Structural Concrete

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A new and appealing mean of improving the cracking behaviour of RC elements is the combined use of rebars and fibres. Previous research has shown that steel fibres recycled from end-of-life tyres are effective for this purpose. This paper presents and discusses practical applications that would benefit from the use of this technique. Firstly, two previously published examples of crack width calculation according to fib Model Code 2010 are expanded to the case under study. These practical applications show how a fibre-reinforced concrete (FRC) with a rather poor post-peak behaviour can exhibit large improvements in cracking behaviour while being economically attractive, too. The case of jointless structures is then considered, and the improvements in terms of maximum achievable length are presented and discussed. Finally, an analysis regarding the effectiveness of this solution as a function of the reinforcement ratio is discussed for both tension and bending. The main objective of this paper is to encourage the use of recycled steel fibres as an effective and sustainable mean of dealing with cracking behaviour for specific applications. K E Y W O R D Scracking, FRC, recycled steel fibres, fib Model Code 2010, integral structures

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“…Nevertheless, these design guidelines (i.e., RILEM TC 162‐TDF and Model Code 2010) rely on test results from SFRC using single‐type fibers (i.e., MSF), and it is not certain if they are also suitable for blended SFRC mixes. Compared with typical MSF, RTSFs have a wide range of fiber length and aspect ratio distributions, as well as higher strength (≥2,000 MPa) . This paper will examine the suitability of these two constitutive models for fiber blends with RTSF.…”

Section: Introductionmentioning

confidence: 99%

Postcracking tensile behavior of blended steel fiber‐reinforced concrete

Wang

Figueiredo

et al. 2018

Structural Concrete

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Fiber blends have the potential to improve the mechanical and sustainability credentials of steel fiber‐reinforced concrete (SFRC), but at which ratios these can work is not known a priori. This paper investigates the uniaxial tensile stress–strain ( σ − ε) relationship of blended SFRC using manufactured steel fibers on their own, or blended with sorted steel fibers recycled from end‐of‐life tires (recycled tire steel fiber [RTSF]), at total fiber dosages of 30, 35, and 45 kg/m3. The accuracy of two σ − ε relations proposed by RILEM TC 162‐TDF and Model Code 2010 is assessed using the experimental results from concrete prisms. By using nonlinear finite element (FE) analysis, it is found that the RILEM approach can lead to significant overestimation (up to 72%) of peak flexural load and energy absorption capacity (up to 39%), while the Model Code 2010 can provide a rather accurate prediction of the energy absorption capacity and some overestimation (less than 34%) of the peak flexural load. Inverse FE analysis is used to determine indirectly the uniaxial tensile σ − ε relations of the examined SFRC mixes, and a simplified trilinear relation for SFRC is proposed. It is concluded that the tensile strength of SFRC with RTSF at a low total fiber dosage is only marginally improved by fiber addition, and the postcracking tensile strengths at different strains can be determined directly from residual flexural tensile strengths (f Ri) of prisms.

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Cracking performance of SCC reinforced with recycled fibres – an experimental study

Cited by 37 publications

References 8 publications

Serviceability performance of FRC columns under imposed displacements: An experimental study

Serviceability performance of FRC columns under imposed displacements: An experimental study

Improving cracking behaviour with recycled steel fibres targeting specific applications - analysis according to fib Model Code 2010

Postcracking tensile behavior of blended steel fiber‐reinforced concrete

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