Evaluation of the Reinforcement Efficiency of Low-Cost Graphite Nanomaterials in High-Performance Concrete

Peyvandi, Amirpasha; Soroushian, Parviz; Farhadi, Nafiseh; Balachandra, Anagi M.

doi:10.1007/s12205-018-0168-6

Cited by 18 publications

(6 citation statements)

References 25 publications

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“…The cement used in this study was ASTM Type I Portland cement having a density of 3.12 g/cm 3 , which was supplied by C¸imsa Company in Turkey.…”

Section: Methodsmentioning

confidence: 99%

“…Due to their high strength properties, excellent thermal conductivity, and high electrical properties, CNTs are used in many applications as a reinforcing material. Young's modulus of a single carbon nanotube is above 1 TPa and its density is 1.33 g/cm 3 . 5 Owing to these properties, its potential to be used as a reinforcing material in concrete increases.…”

Section: Introductionmentioning

confidence: 99%

“…The reasons for preferring concrete can be explained with many properties such as easy to cure, easy to shape, resistant to environmental factors, safe, cost-effective and long usage time. [1][2][3] Concrete and concrete-like structures are quasi-brittle materials with low tensile strength and low strain capacity. These low properties they exhibit can be reduced by making fibre reinforcements.…”

Section: Introductionmentioning

confidence: 99%

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The synergistic effect of CNTs-polymeric surfactant on the properties of concrete nanocomposites: Comparative study

Güler

Cacim

Evi̇n

et al. 2020

Journal of Composite Materials

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Carbon nanotubes (CNTs) have been used as reinforcing material for many different matrices. There are many studies in the literature reporting that reinforcement of CNTs into concrete matrix improved the properties of the concrete. In this study, first unmodified CNTs were reinforced to concrete and it was seen that there were partial decreases in strength despite the increasing rate of CNTs. Thereon, the surfaces of CNTs to be used as reinforcing material were modified with water-soluble surfactants (Polyvinyl alcohol-PVA, Polyvinylpyrrolidone-PVP, Poly (ethylene glycol)-PEG, Dodecylamine-DDA) and reinforced with concrete. In previous studies, many different surfactants were tried to functionalise the surfaces of CNTs. However, in this study, water-soluble polymeric surfactants were preferred without the need for an additional process in order to modify the surfaces of CNTs. In addition, the effect of the surfactants used on the mechanical properties of concrete was examined comparatively. Although the amount of CNTs reinforcement is very low like 0.05 wt%, the increase in strength was seen to be above 60%. The highest strength values were obtained in the sample in which PVA was used as surfactant. Through the surfactants used, bundles of CNTs were fully opened and distributed homogeneously into the concrete matrix, and all of the CNTs were embedded into the matrix by getting wet by the matrix. In the real application, it will be possible to use new generation concretes with higher strength and lighter weight by providing the ease of reinforcing CNTs to the concrete matrix.

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“…The cement used in this study was ASTM Type I Portland cement having a density of 3.12 g/cm 3 , which was supplied by C¸imsa Company in Turkey.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The synergistic effect of CNTs-polymeric surfactant on the properties of concrete nanocomposites: Comparative study

Güler

Cacim

Evi̇n

et al. 2020

Journal of Composite Materials

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“…Civil construction is another area where graphite can be used as an additive to improve the mechanical and microstructural properties of concrete. Peyvandi et al (2018) reported a lower water absorption and an increase in the flexural and impact strength of concrete through the addition of graphite to cement pastes. Nevertheless, graphite is the starting material for the synthesis of graphene and graphene oxide, the latter being obtained through the oxidation and exfoliation of graphite (SALLES et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Easy and fast obtaining of magnetic graphite

Nunes

Salles

Vincensi

et al. 2021

DS-CNT

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The exceptional properties of graphite, such as excellent thermal and electrical conductivity, corrosion resistance, allow this material to be widely explored in the industrial sector as an anatomic component in different material applications for instance lithium batteries. Magnetic nanoparticles, such as magnetite, presented biocompatibility, biodegradability, thermal conductivity, chemical stability, and the possibility of formation of nanocomposites. Thus, this work proposed the magnetization of graphite through a co-precipitation method that employs FeCl 2 as an iron source. This methodology proved a magnetics nanocomposite with different amounts of magnetite incorporated and control of that. The results obtained through the instrumental analysis of XRD demonstrate a high crystallinity of the material and the presence of magnetite on the surface of the graphite. The average crystallite size, updated by the Scherrer equation, shows a decrease of the size as more nanoparticles are incorporated into the nanomaterial. Finally, it is possible to confirm the obtainment of a magnetic nanocomposite using a fast, economical and efficient method.

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“…In this study, to enhance the mechanical properties of composites, this study optimizes the AAMs with nanomaterials. Nanomaterials have been widely applied in concrete to improve its mechanical performance [40][41][42][43]. Particularly, reduced graphene oxide (rGO) is used in construction for its large specific surface area, favorable mechanical strength, and high toughness [44][45][46][47].…”

Section: Introductionmentioning

confidence: 99%

Structural Applications of Thermal Insulation Alkali Activated Materials with Reduced Graphene Oxide

Long¹,

Lin²,

Tan³

et al. 2020

Materials

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Development of low thermal conductivity and high strength building materials is an emerging strategy to solve the heavy energy consumption of buildings. This study develops sustainable alkali activated materials (AAMs) for structural members from waste expanded polystyrene (EPS) beads and reduced graphene oxide (rGO) to simultaneously meet the thermal insulation and mechanical requirements of building energy conservation. It was found that the thermal conductivity of AAMs with 80 vol.% EPS and 0.04 wt.% rGO (E8–G4) decreased by 74% compared to the AAMs without EPS and rGO (E0). The 28-day compressive and flexural strengths of E8–G4 increased by 29.8% and 26.5% with the addition of 80 vol.% EPS and 0.04 wt.% rGO, compared to the sample with 80 vol.% EPS without rGO (E8). In terms of compressive strength, thermal conductivity, and cost, the efficiency index of E8–G4 was higher than those of other materials. A building model made from AAMs was designed using building information modeling (BIM) tools to simulate energy consumption, and 31.78% of total energy consumption (including heating and cooling) was saved in the building operation period in Harbin City, China. Hence, AAMs made of waste EPS beads and rGO can realize the structural and functional integrated application in the future.

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Evaluation of the Reinforcement Efficiency of Low-Cost Graphite Nanomaterials in High-Performance Concrete

Cited by 18 publications

References 25 publications

The synergistic effect of CNTs-polymeric surfactant on the properties of concrete nanocomposites: Comparative study

The synergistic effect of CNTs-polymeric surfactant on the properties of concrete nanocomposites: Comparative study

Easy and fast obtaining of magnetic graphite

Structural Applications of Thermal Insulation Alkali Activated Materials with Reduced Graphene Oxide

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