Research on Dynamic Splitting Tensile Mechanical Properties of Carbon Nanofibers Reinforced Concrete

Wang, Zhihang; Xu, Jinyu; Nie, Liangxue; Wei, Xia; Huang, Zhe; Meng, Xin

doi:10.1088/1755-1315/567/1/012038

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…However, natural fibers might need previous treatment since most natural materials have variable properties (25). Carbon nanoadditives are also an excellent choice for concrete, both in nanotube (26) and nanofiber (27) forms. They are responsible to significantly improve concrete properties, especially in their graphene conformation, which allows an extremely resistant and lightweight material because of the hexagonal conformation of carbon atoms (28).…”

Section: Organic and Inorganic Nanoadditivesmentioning

confidence: 99%

Nanotechnology in Concrete: a Bibliometric Review

Costa¹,

Gomes²,

Thomas³

et al. 2021

BJEDIS

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This review intends to show how nanotechnology is currently being applied in concrete. Both organic and inorganic species can be used as nanoagents, producing materials with improved properties, promoting economic and environmental gains by extending the materials' lifetime. Thus, this paper covers nanotechnology applications to improve mechanical, thermal, and corrosive properties of concrete and shows bibliometric results, proving the increase of interest in these fields. Results have shown that organic agents are more commonly used than inorganic ones, and that nanotechnology is applied mainly to improve mechanical and thermal properties.

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Section: Organic and Inorganic Nanoadditivesmentioning

confidence: 99%

Nanotechnology in Concrete: a Bibliometric Review

Costa¹,

Gomes²,

Thomas³

et al. 2021

BJEDIS

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show abstract

“…The incorporation of filler i.e., E-waste, short synthetic fiber, steel fibers, and natural fibers [1][2][3][4][5] slow down the random propagation of cracks. Along with that, Fiber-reinforced composites (FRP) as external jacket [6][7][8] is promising to enhance their strength due to their superior properties like high tensile strength, impact resistance, stiffness, and flexural strength. Wrapping the HDP (High-Density Polyethylene) sheet enhances the load-carrying capacity [2].…”

Section: Introductionmentioning

confidence: 99%

“…By increasing the wrapping layers, the tensile strength was enhanced by 29% and 67% in FFRP concrete and 32% and 84% in GFRP concrete. similarly, carbon nanofiber-reinforced concrete (CNFC) showed improved dynamic split tensile strength [7]. Non-Woven Polyethylene Terephthalate (PET) plastic tissue-wrapped concrete samples showed a 15.12% increase in tensile strength compared to reference specimens [8].…”

Section: Introductionmentioning

confidence: 99%

An assessment of HDPE fillers and Fiber Wrapping on the strength of Reinforced Concrete

Gudadappanavar

Kulkarni

Gouda

2023

Frattura Ed Integrità Strutturale

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Fiber-reinforced polymer (FRP) is the most promising technique in the present era to bring sustainability, reliability, and pseudo ductility to concrete structures due to its superior properties. Thermoplastic and thermoset polymers are the most thrown-out synthetic waste that contributes to environmental pollution for a long time. Knowing this issue an attempt was made to use High-Density Polyethylene Fiber (HDPE) fillers of size 40x2 mm has been used in concrete. This investigation aims to estimate the integrity effect of HDPE fillers incorporation and wrapping of concrete with Basalt fiber mats (BFM) and Geo-textile fiber mats (GFM) on split tensile strength, shear strength, and impact resistance as per standards. Results indicate that the addition of an optimum quantity of HDPE has a significant effect on improving the tensile, shear, and impact strengths. Adding HDPE fillers in the range of 0.5 - 1.5% in concrete samples wrapped with Basalt and Geo-textile fiber mats showed an increased tensile strength of up to 14.06% and 7.40% respectively with that conventional concrete. Further, wrapping of concrete using Basalt fiber and geotextile fiber mats showed a 4.16% and 20% increase in shear strength for 0.5% HDPE-incorporated concrete samples. Higher impact resistance was also observed for HDPE-added and fiber-wrapped concrete samples.

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Effect of Cu on Performance of Self-Dispersing Ni-Catalyst in Production of Carbon Nanofibers from Ethylene

Bauman

Stoyanovskii

Волочаев

et al. 2023

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The development of effective catalysts for the pyrolysis of light hydrocarbons with the production of carbon nanomaterials represents a relevant direction. In the present work, the influence of copper addition on performance of a self-dispersed Ni-catalyst and structural features of the obtained carbon nanofibers (CNFs) was studied. The precursors of Ni and Ni-Cu catalysts were prepared by activation of metal powders in a planetary mill. During contact with the C2H4/H2 reaction mixture, a rapid disintegration of the catalysts with the formation of active particles catalyzing the growth of CNFs has occurred. The kinetics of CNF accumulation during ethylene decomposition on Ni- and Ni-Cu catalysts was studied. The effect of temperature on catalytic performance was explored and it was shown that introduction of copper promotes 1.5–2-fold increase in CNFs yield in the range of 525–600 °C; the maximum CNFs yield (100 g/gcat and above, for 30-min reaction) is reached on Ni-Cu-catalyst at 575–600 °C. A comparative analysis of the morphology and structure of CNF was carried out using electron microscopy methods. The growth mechanism of carbon filaments in the shape of “railway crossties” on large nickel crystals (d > 250 nm) was proposed. It was found that the addition of copper leads to a decrease in the bulk density of the carbon product from 40–60 to 25–30 g/L (at T = 550–600 °C). According to the low-temperature nitrogen adsorption data, specific surface area (SSA) of CNF samples (at T < 600 °C) lies in the range of 110–140 m2/g, regardless of the catalyst composition; at T = 600 °C the introduction of copper contributed to an increase in the specific surface of CNF by 100 m2/g.

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Research on Dynamic Splitting Tensile Mechanical Properties of Carbon Nanofibers Reinforced Concrete

Cited by 3 publications

References 11 publications

Nanotechnology in Concrete: a Bibliometric Review

Nanotechnology in Concrete: a Bibliometric Review

An assessment of HDPE fillers and Fiber Wrapping on the strength of Reinforced Concrete

Effect of Cu on Performance of Self-Dispersing Ni-Catalyst in Production of Carbon Nanofibers from Ethylene

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