Impact of Thermal Modification on Properties of Basalt Fiber for Concrete Reinforcement

Строкова, В.; NELYUBOVA, V.V.; Zhernovsky, I.; Masanin, O.; Usikov, S.; Babaev, V.

doi:10.1007/978-3-030-22974-0_94

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…Moreover, a slight decrease in the lattice constants can be noticed, particularly on the c-axis. The thermal treatment was accompanied by microdefect healing (vacancies, holes, interstitial impurities, dislocations), structure densification, and energetic tendency to the equilibrium state [ 50 ]. The improvement in the crystallinity could also be noticed from the full-width at half-maximum (FWHM) values, which were narrower as the thermal treatment temperature increased.…”

Section: Resultsmentioning

confidence: 99%

Effect of Thermal Treatment on the Structure and Morphology of Vanadium Doped ZnO Nanostructures Obtained by Microwave Assisted Sol–Gel Method

Vladut

Mocioiu

Preda

et al. 2022

Gels

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In this paper, we conducted a fundamental study concerning the effect of thermal treatment on the structure and morphology of 2 mol% vanadium doped ZnO nanopowders obtained by microwave assisted sol–gel method (MW). The samples were analyzed by DTA, FTIR, XRD, SEM, and UV–Vis spectroscopy. The DTA results showed that above 500 °C, there was no mass loss in the TG curves, and ZnO crystallization occurred. The XRD patterns of the thermally treated powders at 500 °C and 650 °C showed the crystallization of ZnO (zincite) belonging to the wurtzite-type structure. It was found that in the 650 °C thermally treated powder, aside from ZnO, traces of Zn3(VO4)2 existed. FTIR spectra of the annealed samples confirmed the formation of the ZnO crystalline phase and V–O bands. The micrographs revealed that the temperature influenced the morphology. The increase in the annealing temperature led to the grain growth. The SEM images of the MW powder thermally treated at 650 °C showed two types of grains: hexagonal grains and cylindrical nanorods. UV–Vis spectra showed that the absorption band also increased with the increasing temperature of thermal treatment. The MW sample annealed at 650 °C had the highest absorption in ultraviolet domain.

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Section: Resultsmentioning

confidence: 99%

Effect of Thermal Treatment on the Structure and Morphology of Vanadium Doped ZnO Nanostructures Obtained by Microwave Assisted Sol–Gel Method

Vladut

Mocioiu

Preda

et al. 2022

Gels

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“…The fiber length was 12 mm. Also, the study investigated the properties of the above-mentioned basalt fiber, modified according to the method developed in [10]. The essence of the method is to increase the alkali resistance of the fiber by increasing the degree of polymerization during heat treatment (about 500 °C).…”

Section: Methodsmentioning

confidence: 99%

Properties of Microfibers of Various Compositions as a Component of Cellular Composites

Netsvet

Popov

Nelubova

et al. 2021

MSF

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The paper presents studies on the properties of various types of micro-reinforcing fibers to assess their role and effectiveness in the structure formation of the cellular composite. Based on the data on the weight loss after exposure in a model medium of cement, analysis of the alkali resistance of fibers of five different types – basalt fiber, heat-treated basalt fiber, polymer fiber and glass fibers from two different manufacturers – was carried out. It is shown that the fibers have a sufficiently high durability in the medium of hardening cement, which is expressed by a relatively insignificant weight loss of the original fiber after exposure in a model medium for 28 days in ambient conditions. The weight loss for some fibers sharply increases when hardening conditions are changed to hydrothermal ones. The images of fibers exposed in a model medium of cement, obtained using scanning microscopy, were also analyzed, and the character of distribution of acidic and basic adsorption sites on the surface of fibers depending on the type was assessed. Based on the analysis of the obtained data, we can talk about a high number of active sites on the surface of basalt and glass fibers, which ensures the formation of crystalline new formations on them and makes it possible to predict their high adhesion to the cement matrix.

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Impact of Thermal Modification on Properties of Basalt Fiber for Concrete Reinforcement

Cited by 2 publications

References 4 publications

Effect of Thermal Treatment on the Structure and Morphology of Vanadium Doped ZnO Nanostructures Obtained by Microwave Assisted Sol–Gel Method

Effect of Thermal Treatment on the Structure and Morphology of Vanadium Doped ZnO Nanostructures Obtained by Microwave Assisted Sol–Gel Method

Properties of Microfibers of Various Compositions as a Component of Cellular Composites

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