Application of Secondary Carbon Fiber for Reinforcing Composite Material Based on Alkali-Activated Blast-Furnace Slag

Клименко, Н. Н.; Нистратов, А. В.; Kiseleva, K. I.; Delitsyn, L. M.; Сигаев, В. Н.

doi:10.1007/s10717-021-00324-w

Cited by 2 publications

(4 citation statements)

References 10 publications

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“…Silica-slag-based blocks were reinforced with 1-5 wt. % of thermally recovered glass fibers prepared according to [49]. Uniaxial compressive strength and bending strength (at least 6 granules of the sample with each addition) were measured by high-precision universal test machine Autograph AGS-X (SHIMADZU) running at a displacement rate of 1mm/min according to the standard Russian GOST10180-2012.The whole scheme demonstrating the methodology of the present study is shown in Figure 2.…”

Section: -3-measurementsmentioning

confidence: 99%

“…This work proposes using secondary fibers: introducing CFs into active coal pellets and GFsinto silicate bricks. They have relatively low compressive strength: active coal -100-1000 kg/cm2 (10-100 MPa) [53], silicate bricks -52 MPa, which can be increased by dispersed reinforcement [49]. Tensile strength, usually determined for composites with secondary fibers, does not matter for these materials (not rated).…”

Section: -4-reinforcement With the Recovered Fibersmentioning

confidence: 99%

“…As for secondary CFs, their application for reinforcing construction materials by our colleagues is described in [49]. The addition of only 0.7% by volume to slag-based blocks increased their compression strength by 20% and bending strength by 35%.…”

Section: -4-reinforcement With the Recovered Fibersmentioning

confidence: 99%

“…The process' disadvantages include the uneven heating of the reactor's operating space and, consequently, possible incomplete binder decomposition and the need to deactivate the pyrolysis gases that contain hazardous compounds. Secondary CFs recovered by thermal regeneration [49] were used for the dispersed reinforcement of composites based on alkali-activated granulated blast furnace slag. The results obtained demonstrate the addition of secondary CFs in the amount of 0.7% vol.…”

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Thermal Regeneration and Reuse of Carbon and Glass Fibers from Waste Composites

et al. 2022

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This article aims to develop a method for regenerating and reusing carbon and glass fibers extracted from unrecyclable scraps of carbon plastics, printer parts, and laminating coating. A comparison of known methods of fiber regeneration revealed the advantages of thermal treatment: absence of costs of reagents and complex equipment; better preservation of composition; and strength of fibers. Based on the results of thermographic analysis of wastes in nitrogen and air, the destruction temperatures of their organic matrices were determined (200-460°С), and the use of calcination instead of pyrolysis was justified. The appearance and surface quality of the regenerated fibers are characterized by optical and electron microscopy. It has been established that quantitative extraction of pure carbon and glass fibers from waste crushed to 1 cm is efficient by their calcination at 700 °C for 0.5 h and 500 °C for 1 h, respectively. The principle of creating new composites with the obtained fibers based on the similarity of their composition and binding materials (matrices) has been proposed. It was shown that the introduction of 1 wt% of fibers into slag blocks and active carbon pellets considerably increases their compressive strength, but the bending strength does not change due to dispersed reinforcement. Possible improvement of mechanical properties of products requires reagent treatment of the fiber surface or the introduction of binder additives. Calculations show that the developed method of recycling composite waste can produce 2.3 tons/hour of reinforced building materials that are good for the environment and the economy, excluding expenses for landfill waste disposal and reducing the cost of the product by replacing the primary fiber for the secondary one. Doi: 10.28991/ESJ-2022-06-05-04 Full Text: PDF

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Section: -3-measurementsmentioning

confidence: 99%

Section: -4-reinforcement With the Recovered Fibersmentioning

confidence: 99%

Section: -4-reinforcement With the Recovered Fibersmentioning

confidence: 99%

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