Steel fibre content and interconnection induced electrochemical corrosion of Ultra-High Performance Fibre Reinforced Concrete (UHPFRC)

Song, Qiulei; Yu, Rui; Shui, Zhonghe; Rao, Suduan; Wang, Xinpeng; Sun, Meijuan; Jiang, Chunyuan

doi:10.1016/j.cemconcomp.2018.09.010

Cited by 69 publications

(14 citation statements)

References 34 publications

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“…20, the D nssm of mixture without fibre reinforcement (F0) was around 8.27 Â 10 À12 m 2 /s which can be classified as 'high' in terms of the resistance to chloride penetration. However, the incorporation of fibres increased the D nssm of concrete, which was in the range of 10.03 Â 10 À12 to 10.76 Â 10 À12 m 2 / s. RS1.0 exhibited the highest D nssm which was in agreement with previous studies (Song et al, 2018;Teng et al, 2018) that the high conductivity of SFs significantly contributed to the increment of D nssm , as RCM test is conducted based on the passing of electric current within the concrete. Adding more SFs would increase the number of connected fibres and accordingly the current through concrete would be increased as well as D nssm .…”

Section: Rapid Chloride Migration Coefficientsupporting

confidence: 90%

Experimental study on engineering properties of concrete reinforced with hybrid recycled tyre steel and polypropylene fibres

Zhong

Zhang

2020

Journal of Cleaner Production

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Recycled tyre steel fibre (RTSF) is considered as a potential and sustainable alternative to manufactured steel fibre (MSF), while RTSF resulted in lower energy absorption capacity and more serious corrosion problem in concrete compared to MSF. This paper presents an experimental study on engineering properties of concrete reinforced with hybrid RTSF (0.5%e0.9% V f ) and polypropylene fibre (PPF, 0.1% e0.5% V f ). Results show that combining RTSF with PPF could compensate the serious workability loss caused by RTSF and the workability was improved by 38.9%e66.7%. However, the compressive, splitting tensile and flexural strengths were weakened significantly when PPF was over 0.3% V f in hybrid fibre reinforcement (total content of 1.0% V f ). The strain field shown in digital image correlation images suggests that hybrid RTSF and PPF can create a synergistic effect in restraining the crack growth and the post-cracking behaviour of concrete especially toughness that was enhanced with the presence of PPF. RTSF was more effective in restraining shrinkage of concrete than PPF. With the increase of PPF content in hybrid fibre reinforcement, the chloride migration coefficient of concrete was reduced by 4.9%e6.8% as compared with the mixture reinforced with only RTSF.

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Section: Rapid Chloride Migration Coefficientsupporting

confidence: 90%

Experimental study on engineering properties of concrete reinforced with hybrid recycled tyre steel and polypropylene fibres

Zhong

Zhang

2020

Journal of Cleaner Production

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“…Thus, the influence of this parameter on the porous structure of UHs should be considered. In this research, fibre content was limited to 2 vol.% because, according to Song et al [ 47 ], higher contents do not significantly raise UHPFRC mechanical strength and may adversely affect durability. The experimental UHs were labelled to specify the proportion of added fibres (0F, 1F, 2F) and curing conditions (air, 20 °C, 60 °C, 90 °C).…”

Section: Methodsmentioning

confidence: 99%

Porous Structure of Ultra-High-Performance Fibre-Reinforced Concretes

et al. 2021

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The aim of this experimental work was to study the porous structure of Ultra-High-Performance Fibre-Reinforced Concretes (UH) made with different fibre volume contents (0%, 1%, 2%) under several curing conditions (laboratory environment, 20 °C, 60 °C, 90 °C), comparing the results with those recorded for ordinary, high strength and very high strength concretes. Scanning electron microscopy, mercury intrusion porosimetry, thermogravimetry, water absorption and oxygen permeability tests were carried out. The results showed a low portlandite content in UH (in the order of 75% lower than in concrete C50) and a low degree of hydration, but they rise with curing temperature. These concretes have a very fine porous structure, with a high concentration of pores on the nanoscale level, below 0.05 µm. Their porosity accessible to water is consequently around 7-fold lower than in conventional (C30), 6-fold lower than in high-strength (C50) and 4-fold lower than in very high-strength (C90) concretes. Their oxygen permeability is at least one order of magnitude lower than in C90, two orders of magnitude lower than in C50 and three orders of magnitude lower than in C30. The percentage of added steel fibre does not affect the UH porous structure.

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“…The chloride ion diffusion coefficient in the concrete was calculated by equation (1) (Song et al, 2018)…”

Section: Materials and Test Methodsmentioning

confidence: 99%

“…The specimen was split after the measurement was complete, and 0.1 mol/L AgNO 3 solution was sprayed onto one of the freshly split sections to reveal the penetration depth (Figure 4). The chloride ion diffusion coefficient in the concrete was calculated by equation (1) (Song et al, 2018)…”

Section: Test Methodsmentioning

confidence: 99%

Experimental investigation on compressive strength and chloride permeability of fiber-reinforced concrete with basalt-polypropylene fibers

Niu

Huang

2019

Advances in Structural Engineering

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Steel fibre content and interconnection induced electrochemical corrosion of Ultra-High Performance Fibre Reinforced Concrete (UHPFRC)

Cited by 69 publications

References 34 publications

Experimental study on engineering properties of concrete reinforced with hybrid recycled tyre steel and polypropylene fibres

Experimental study on engineering properties of concrete reinforced with hybrid recycled tyre steel and polypropylene fibres

Porous Structure of Ultra-High-Performance Fibre-Reinforced Concretes

Experimental investigation on compressive strength and chloride permeability of fiber-reinforced concrete with basalt-polypropylene fibers

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