Time dependent behaviour of fibre pull-out in self-compacting concrete

Abrishambaf, Amin; Barros, Joaquim A. O.; Cunha, Vítor M. C. F.; Frazão, Cristina Maria Vieira

doi:10.1016/j.cemconcomp.2016.12.004

Cited by 19 publications

(11 citation statements)

References 16 publications

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“…11. The numerical model corroborated the latter phenomena, which were also observed by other authors such us Markovic (2006), Laranjeira et al (2010b), Cunha (2010), Abrishambaf et al (2017). Fig.…”

Section: Stress Evolution In the Fibresupporting

confidence: 89%

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Rate effect in inclined fibre pull-out for smooth and hooked-end fibres: a numerical study

Poveda

Tarifa

et al. 2019

Int J Fract

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Based on a numerical model to simulate the static behaviour of a smooth fibre extracted from a cementitious matrix, a rate dependent friction law, widely used in earthquake engineering for steady-state slip phenomena, is proposed to capture the rate effect observed in dynamic pull-out tests for both smooth and hooked-end fibres. After calibrating the friction coefficients with the experimental results of smooth fibres, the model is subsequently applied to predict the pullout behaviour of both smooth and hooked-end fibres at different inclination angles (0 • , 30 • and 60 • ) loaded at three different velocities (0.01, 0.1 and 1 mm/s). The global tendency of all the pull-out curves was captured, fibre's cross sectional deformations were also reproduced remarkably well. Moreover, the developed model helps to cast light on the different mechanisms related to the pull-out process.

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Section: Stress Evolution In the Fibresupporting

confidence: 89%

“…The physicochemical bond characterisation (Nammur and Naaman 1989;Naaman and Najm 1991;Abrishambaf et al 2017) comprises not only the debonding of the surround interface but also the frictional slip of the fibre. Figure 2a represents the behaviour of a single smooth fibre (Cunha 2010), i.e.…”

Section: Interface Bond Characterisationmentioning

confidence: 99%

Rate effect in inclined fibre pull-out for smooth and hooked-end fibres: a numerical study

Poveda

Tarifa

et al. 2019

Int J Fract

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“…RSF are also used in concrete to restrain the crack opening by bridging the crack surfaces, which leads to an increase in terms of post-cracking load bearing and energy absorption capacity with beneficial consequences in terms of concrete durability [10][11][12][13]. However, the crack restraint effectiveness depends on the bond behavior of the fiber/matrix interface [14].…”

Section: Introductionmentioning

confidence: 99%

An experimental study on the corrosion susceptibility of Recycled Steel Fiber Reinforced Concrete

Frazão

Díaz

Barros

et al. 2019

Cement and Concrete Composites

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Steel fibers resulting from the industry of tire recycling can be efficiently employed in concrete to improve its mechanical performance, such as post-cracking load bearing and energy absorption capacity. Under chloride attack, an important aspect of Recycled Steel Fiber Reinforced Concrete (RSFRC) durability is its corrosion resistance. However, the insufficient knowledge on this domain contributes for a conservative design philosophy, which can compromise the cost competitiveness of RSFRC and prevent its application in elements where this occurrence, even eventual, is not acceptable.In the present work, an experimental program was performed with the aim of assessing the corrosion susceptibility of RSFRC including the characterization of the micro-mechanical properties and the corrosion resistance of recycled steel fiber (RSF) by means of nano-indentation testing, electrochemical monitoring techniques and scanning electron microscopy (SEM) analysis. The influence of the small rubber debris attached to the RSF surface was also analyzed by using two distinct pre-treatment methods. The adhesive bond behavior between the RSF and the surrounding self-compacting concrete (SCC) matrix was analyzed by performing monotonic RSF pullout tests. Double edge wedge splitting (DEWS) tests were conducted for evaluating the corrosion effects onthe post-cracking response of RSFRC.

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“…Although there is a gap in literature on fiber-to-mortar bond response in TRM composites (made of lime-based mortars), several information can be found regarding this mechanism in textile reinforced concrete (TRC), where cementitious mortars are utilized [14]. The available results show that the mechanical properties of the textile and the mortar, the chemical interaction between them [14][15][16][17][18] as well as the fiber embedded length [19,20] and orientation with respect to the crack surface [21][22][23] are among the main parameters that can affect the fiber-to-mortar bond response. A variety of pull-out test setups have been used in literature for the characterization of the fiber-to-mortar (or concrete) bond behavior.…”

Section: Introductionmentioning

confidence: 99%

Effect of test setup on the fiber-to-mortar pull-out response in TRM composites: Experimental and analytical modeling

Dalalbashi

Ghiassi

Oliveira

et al. 2018

Composites Part B: Engineering

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Textile-reinforced mortars (TRM) have recently received significant attention for the externally bonded reinforcement (EBR) of masonry and historical structures. The fiber-tomortar bond, the TRM-to-masonry bond, and the mechanical properties of the TRM constituents have a fundamental role in the performance of this strengthening technique and therefore require special attention. Despite this importance, only few investigations are devoted to characterization of the single fiber-to-mortar bond response in these systems. This paper, as an step towards addressing the fiber-to-mortar bond, presents a combined experimental and analytical investigation on the effect of test setup on the pull-out response and bond-slip laws in TRM composites. Three different pull-out test setups, consisting of one pull-pull and two pull-push configurations, are developed and investigated for characterization of the single fiber-to-mortar bond behavior. The experimental and analytical results are critically discussed and presented and bond-slip laws are extracted for each test setup.

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Time dependent behaviour of fibre pull-out in self-compacting concrete

Cited by 19 publications

References 16 publications

Rate effect in inclined fibre pull-out for smooth and hooked-end fibres: a numerical study

Rate effect in inclined fibre pull-out for smooth and hooked-end fibres: a numerical study

An experimental study on the corrosion susceptibility of Recycled Steel Fiber Reinforced Concrete

Effect of test setup on the fiber-to-mortar pull-out response in TRM composites: Experimental and analytical modeling

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