Mechanical properties and pore structure of basalt–polypropylene fiber fly ash concrete exposed to high temperatures

Zheng, Qianqian; Zhang, Jingshuang

doi:10.1063/5.0099151

Cited by 4 publications

(1 citation statement)

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“…Compared to the control concrete containing 100% recycled aggregates and without basalt fibers, 1% basalt fibers resulted in a 31.6% decreasing in drying shrinkage (Jiao et al, 2022). The results demonstrated that hybrid basalt-polypropylene fiber-reinforced concrete outperformed conventional concrete (Zhang, 2017;Zhang et al, 2018;Sun et al, 2019;Fu et al, 2021;Klyuev et al, 2023).…”

Section: Introductionmentioning

confidence: 90%

Impact of basalt fiber reinforced concrete in protected buildings: a review

Vatin,

Hematibahar,

Gebre

2024

Front. Built Environ.

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This study investigates on the impact of basalt fiber reinforcement concrete in protected building and structures. Basalt fibers, derived from the melting of basalt rock at temperatures ranging from 1,500 to 1700°C, are recognized as sustainable and environmentally friendly fiber materials. Various studies have revealed differing optimal percentages of basalt fibers for enhancing the mechanical and chemical properties of concrete. The objectives of this paper are to investigate the effects of basalt fibre reinforcement on mechanical properties like tensile, compressive, and bending strengths. Additionally, performance indicators like void content, water absorption, chloride ion permeability, alkali and slag resistance, temperature stability, shrinkage characteristics, and abrasion resistance will be evaluated. Basalt fibre is typically utilised to increase the mechanical properties and durability of concrete, which has an impact in the effect on protected buildings and structures. The findings indicate that the most effective percentage range for improving mechanical properties lies between 0.1% and 0.3% of basalt fibers. Notably, concrete reinforced with basalt fibers demonstrates superior mechanical and chemical performance in alkaline environments compared to other fiber types. Moreover, the addition of 0.5% basalt fibers to concrete has been shown to significantly reduce chloride ion penetration, as evidenced by a decrease in RCPT load from 2,500 (C) to 1900 (C), indicative of enhanced chloride resistance. Reinforced concrete containing basalt fibers exhibits remarkable temperature resistance, withstanding temperatures exceeding 800°C due to its high-water absorption capacity. Additionally, basalt fibers exhibit resilience at temperatures up to 200°C. However, it is noted that the introduction of 0.14% basalt fibers leads to a slight increase in water absorption from 4.08 to 4.28. In general, basalt fibres are beneficial to many aspects of concrete; they strengthen resistance to temperature, alkali, acid exposure, and chloride while also improving mechanical qualities such as bending and tensile strength. The development of basalt fibres that extend building lifespans and improve concrete quality for structural engineering applications is making encouraging strides, according to all the results.

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Section: Introductionmentioning

confidence: 90%

Impact of basalt fiber reinforced concrete in protected buildings: a review

Vatin,

Hematibahar,

Gebre

2024

Front. Built Environ.

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Graphical analysis-based calculation method of concrete strength

Wang,

Zhang,

et al. 2024

AIP Advances

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This study established a three-dimensional random spherical aggregate model of concrete. Models with various volume contents of coarse aggregate were sliced, and slice areas were statistically analyzed. To study the effects of the coarse aggregate volume content and the interfacial transition zone (ITZ) strength on concrete’s compressive strength, a concrete strength calculation method based on graphical analysis was proposed. The ratio of crown area B to sectional area A of the spherical aggregate model was found to be close to 1.5. At the ITZ strength below 70% of the mortar strength, the increased volume content of coarse aggregate reduced the compressive strength of concrete, with the opposite trend observed at the ITZ strength exceeding 70% of the mortar strength.

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Impact resistance of geopolymer concrete under different types of fiber admixtures

Zhi,

Zhang,

Wang

et al. 2023

AIP Advances

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To investigate the dynamic mechanical response characteristics of geopolymer concrete under impact load, the effects of different curing ages and strain rates on the impact resistance of geopolymer concrete have been explored. First, this paper first obtains the optimal mix ratio of geopolymer concrete by optimizing the slump test of mix ratio. Second, the stress–strain constitutive relationship of geopolymer concrete at different ages is deduced, and the mechanical properties, such as axial compressive strength and elastic modulus, are determined. Finally, two different kinds of fibers, carbon fiber and steel fiber, are mixed into concrete, which are utilized to test the mechanical properties including compressive strength, splitting tensile strength, flexural strength, and impact toughness. The results indicate that with the increase in carbon fiber content, the compressive strength, splitting tensile strength, and flexural strength of geopolymer concrete decrease first and then increase. Moreover, with the increase in steel fiber content, the compressive strength of geopolymer concrete increases continuously, the splitting tensile strength increases first and then decreases, the flexural strength decreases first and then increases, and the impact toughness increases first and then decreases.

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Mechanical properties and pore structure of basalt–polypropylene fiber fly ash concrete exposed to high temperatures

Cited by 4 publications

References 50 publications

Impact of basalt fiber reinforced concrete in protected buildings: a review

Impact of basalt fiber reinforced concrete in protected buildings: a review

Graphical analysis-based calculation method of concrete strength

Impact resistance of geopolymer concrete under different types of fiber admixtures

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