Selection of basalt fiber with resistance to concrete alkaline environment

Pastsuk, Vitali; Kiisk, Madis; Lõhmus, Rünno; Merisalu, Maido; Kovaljov, Sergei; Biland, Alex; Gulik, Volodymyr

doi:10.1007/s42452-020-03677-z

Cited by 11 publications

(9 citation statements)

References 34 publications

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“…The surface roughness of the sample is assumed to be atomic-flat, not influencing the EDS analysis. We employed a typical composition of basalt-derived glass fibre, as reported by [41][42][43], whose chemical composition, expressed as the mass fraction of oxides, is reported in Table 1, with a mass density 2.66 g/cm 3 [41,44,45]. Basalt fibres are produced by melting volcanic basalt rocks at 1450-1500 • C at atmospheric pressure into a furnace, and forcing the molten material through platinum/rhodium crucible bushings to create fibres (see [7] for details of the process).…”

Section: Fibre-reinforced Geopolymer Modelmentioning

confidence: 99%

Fibre-Reinforced Geopolymer Composites Micro-Nanochemistry by SEM-EDS Simulations

2021

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The focus of the present study is on fibre-reinforced geopolymer composites, whose optimization and application necessarily need a detailed chemical characterization at the micro-nanoscale. In this regard, many geopolymer composites presenting micro and nanometric architectures pose a challenge for scanning electron microscopy with energy dispersive X-ray microanalysis (SEM-EDS) quantification, because of several potential sources of errors. For this reason, the present work reports a SEM-EDS Monte Carlo approach to carefully investigate the complex physical phenomena related to the cited quantification errors. The model used for this theoretical analysis is a simplified fibre-reinforced geopolymer with basalt-derived glass fibres immersed in a potassium-poly(sialate-siloxo) matrix. The simulated SEM-EDS spectra showed a strong influence on the measured X-ray intensity of (i) the sample nano-to-micro architecture, (ii) the electron beam probing energy and (iii) the electron probe-sample-EDS detector relative position. The results showed that, compared to a bulk material, the X-ray intensity for a nano-micrometric sized specimen may give rise to potential underestimation and/or overestimation of the elemental composition of the sample. The proposed Monte Carlo approach indicated the optimal instrumental setup depending on the sample and on the specific SEM-EDS equipment here considered.

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Section: Fibre-reinforced Geopolymer Modelmentioning

confidence: 99%

Fibre-Reinforced Geopolymer Composites Micro-Nanochemistry by SEM-EDS Simulations

2021

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“…Basalt fiber filaments, especially those with high modulus, high strength, and high temperature resistance are characterized by high stiffness; the properties usually used in aerospace; nevertheless, basalt fibers have a prickly sensation owing to their high rigidity and are prone to splitting under twisting (Chen et al, 2017;Pastsuk et al, 2020). Organic staple fibers, such as cotton, tencel, and viscose, normally have a low modulus as well as high spinnability and comfort (Karthik et al, 2017;Goergen et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

A spinning method for low-torsion composite yarn with basalt fibers and staple cotton fibers

Peng

Zhang

et al. 2023

Front. Mater.

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Basalt fibers play an indispensable role in aerospace as well as fireproof suits in specialty fields. However, basalt fibers usually have properties such as high temperature and corrosion resistance, severely lack comfort, and are prone to brittle fracture or splitting when subjected to bending or impact forces because of their high modulus. Although considerable efforts have been made to solve the above problems by wrapping soft staple fibers with basalt, but the problem of difficult stress balance exists in the composite process. Herein, we demonstrate that a stress balance spinning method to control the composite conformation between high stiffness basalt fibers and soft cotton fibers, possess significant modulus differences, for high spinnability and comfort composite yarns production on ring spinning. Geometric analysis demonstrated that the stress during retwisting adjusts the internal structure of the basalt fiber and changes the arrangement of exposed cotton fiber bundles, causing the fiber motion track to change from concentric helix to deformed non-concentric helix. The mechanical aspects show that over-twisted composite yarns lead to fiber exposure as well as detachment due to irregular fiber twisting, while low-twisted composite yarns can overcome residual torque and modulus differences. Afterwards, a systematic comparison of composite yarns with different parameters reveals that low-twisted composite yarns have a better helicoid structure, strength and uniformity than raw and over-twisted composite yarns.

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“…In terms of economy, environmental protection, and reinforcement effect, after a large number of studies and comparisons [ 20 , 21 , 22 , 23 ], it has been found that polypropylene fibers, glass fibers, polyvinyl alcohol fibers, and basalt fibers are currently among the most frequently used fibers. Therefore, taking different fiber types (polypropylene fiber, glass fiber, polyvinyl alcohol fiber, and basalt fiber) and fiber lengths (3, 6, 9, and 12 mm) as the research objects for indoor tests and through comprehensive analysis of various physical and mechanical parameters, the influence mechanism of fiber length and fiber type on the strength of microbial solidified sand soil is explored.…”

Section: Introductionmentioning

confidence: 99%

Influence of Fiber Type and Length on Mechanical Properties of MICP-Treated Sand

Xiao

Wang

et al. 2022

Materials

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Fibers are applied in construction work to improve the strength and avoid brittle failure of soil. In this paper, we analyze the impact mechanism of fiber type and length on the immobilization of microorganisms from macroscopic and microscopic perspectives with fibers of 0.2% volume fraction added to microbial-induced calcite precipitation (MICP)-treated sand. Results show the following: (1) The unconfined compressive strength (UCS) of MICP-treated sand first increases and then decreases with increasing fiber length because short fiber reinforcement can promote the precipitation of calcium carbonate, and the network formed between the fibers limits the movement of sand particles and enhances the strength of the microbial solidified sand. However, the agglomeration caused by overlong fibers leads to uneven distribution of calcium carbonate and a reduction in strength. The optimal fiber length of polypropylene, glass, and polyvinyl alcohol fiber is 9 mm, and that of basalt fiber is 12 mm. (2) The UCS of the different fiber types, from small to large, is basalt fiber < polypropylene fiber < glass fiber < polyvinyl alcohol fiber because the quality of the fiber monofilament differs. More fibers result in more a evident effect of interlacing and bending on sand and higher strength in consolidated sand.

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Selection of basalt fiber with resistance to concrete alkaline environment

Cited by 11 publications

References 34 publications

Fibre-Reinforced Geopolymer Composites Micro-Nanochemistry by SEM-EDS Simulations

Fibre-Reinforced Geopolymer Composites Micro-Nanochemistry by SEM-EDS Simulations

A spinning method for low-torsion composite yarn with basalt fibers and staple cotton fibers

Influence of Fiber Type and Length on Mechanical Properties of MICP-Treated Sand

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