Tensile creep of macro-synthetic fibre reinforced concrete (MSFRC) under uni-axial tensile loading

Babafemi, Adewumi John; Boshoff, William P.

doi:10.1016/j.cemconcomp.2014.08.002

Cited by 75 publications

(34 citation statements)

References 10 publications

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“…Figure 7 reveals that the addition of the fibres has a negative effect on the compressive strength of the concrete at the dosages investigated. This is consistent with several works on the effect of synthetic fibres on the compressive strength of ordinary concrete (Hsie et al 2008;Babafemi & Boshoff 2015).…”

Section: Compressive Strengthsupporting

confidence: 81%

“…The scepticism is strengthened by the fact that synthetic macro fibres have low stiffness compared to steel fibres, and have been reported to creep significantly more than steel (Babafemi & Boshoff 2015;Pujadas et al 2017). However, this should not discourage its use, but requires that certain design guidelines be established for its sensible application (Pujadas et al 2017).…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of locally available synthetic macro fibres in a single-fibre pullout test in concrete

Babafemi

Combrinck

Villiers

et al. 2018

J. S. Afr. Inst. Civ. Eng.

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There is increasing use of synthetic macro fibres in concrete applications. However, the performance of these fibres varies, based on various factors. This study investigates the fibre/ matrix interface performance of four types of synthetic macro fibres locally available in the South African construction market. The influence of water-cement ratio (w/c), fibre embedment length, fibre properties and fibre snubbing angle on the single-fibre pull-out behaviour is studied in this paper. The influence of some of these properties on the compressive strength is also evaluated. Three mix designs and four fibre types were used for the investigation. All tests were performed in a controlled climate room. Specimens with single fibres were tested in a Universal Testing Machine. Scanning Electron Microscope (SEM) images of pulled out fibres were examined for inferences. The results have shown that w/c has no influence on the pull-out load of synthetic macro fibres. However, the pull-out load increases with increase in fibre embedment length and equivalent fibre diameter. Pull-out load increases for flat fibres bent along their strong axis as the fibre snubbing angle increases. While crimped fibres with improved geometry show optimum pull-out performance when pulled out perpendicularly to the crack plane, flat fibres performed better at the snubbing angles tested. SEM images also show more surface damage on fibres with irregular geometry.

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Section: Compressive Strengthsupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Evaluation of locally available synthetic macro fibres in a single-fibre pullout test in concrete

Babafemi

Combrinck

Villiers

et al. 2018

J. S. Afr. Inst. Civ. Eng.

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“…Tensile creep in cracked state has been studied on both cylindrical specimens (Zhao et al 2012) and prismatic specimens (Babafemi & Boshoff 2015). Flexural creep researches are more extended.…”

Section: Introductionmentioning

confidence: 99%

Database on the Long-Term Behaviour of FRC: A Useful Tool to Achieve Overall Conclusions

Ros¹,

Llano-Torre²,

García-Taengua³

et al. 2015

Concreep 10

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The long term behaviour of Fibre Reinforced Concrete on cracked state is an important research topic, since it is essential to understand this property when using FRC as structural material. The RILEM CCF Technical Committee was created in order to focus the efforts of all researchers on the better understanding of creep behaviour. One of the objectives of the TC was to compile a global database of results of creep test in order to analyse this phenomenon in an overall review. In order to achieve a complete enough database, several minimal variables and parameters data have been proposed on this first attempt. This first database of creep results is based on flexural creep test with different environmental conditions. In future, it can be extended to other testing methodologies. Thanks to this database, first conclusions start reveal those variables which have a higher significance level in creep deferred behaviour.

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“…For instance, a research has been carried out on the creep behavior of pre-cracked macro-synthetic fiber reinforced concrete (MSFRC) under axial tensile sustained loading 12 .…”

Section: Introductionmentioning

confidence: 99%

“…In the recent years, the analytical methods have been introduced for analyzing nonlinear differential and ordinary equations with purpose of obtaining suitable solutions and algorithms. In addition, some analytical and experimental attempts were carried out to analyze the creep behaviors [7][8][9][10][11][12] .…”

Section: Introductionmentioning

confidence: 99%

On the Use of Special Functions for Analyzing the Steady State Creep in Short Fiber Composites Semi-theoretically

Monfared

Daneshmand

2015

Mat. Res.

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In this paper, a novel method is presented to obtain some unknowns such as displacement rate using special and well-behaved functions for short fiber composites in the steady state creep by semi-theoretical method (STM). The creep behaviors are predicted in the short fiber composites under tensile axial stress. Also, the regions under the partial debonding are predicted by the obtained results along with the reason of the partial debonding. The main purpose of this research is the use of the mathematical model instead of the time consuming and expensive experimental methods. On the other hand, the creep unknowns are simply obtained by the special functions rather than some complex theories. The use of sensor is one of the important applications of the present method in the regions with uniform behaviors. The obtained analytical results are validated by FEM results. Average difference between the analytical method and FEM results is about 10% approximately. Finally, good agreements are found between the obtained analytical and FEM results for predicting the creep behavior.

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Tensile creep of macro-synthetic fibre reinforced concrete (MSFRC) under uni-axial tensile loading

Cited by 75 publications

References 10 publications

Evaluation of locally available synthetic macro fibres in a single-fibre pullout test in concrete

Evaluation of locally available synthetic macro fibres in a single-fibre pullout test in concrete

Database on the Long-Term Behaviour of FRC: A Useful Tool to Achieve Overall Conclusions

On the Use of Special Functions for Analyzing the Steady State Creep in Short Fiber Composites Semi-theoretically

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