Electrochemically Exfoliated Graphene for High-Durability Cement Composites

Krystek, Małgorzata; Pakulski, Dawid; Górski, Marcin; Szojda, Leszek; Ciesielski, Artur; Samorı́, Paolo

doi:10.1021/acsami.1c04451

Cited by 13 publications

(5 citation statements)

References 43 publications

(127 reference statements)

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“…In contrast to the coating method, direct doping of graphene materials can demonstrate the impermeability and overall strength of cemented materials and prevent the erasure of chloride ions and the rusting of internal steel rods. Regarding microstructure and permeability resistance theory, Krystek et al [ 67 ] attributed the chloride ion resistance to the shrinkage of large capillary pores. Similarly, Zhou et al [ 68 ] found through simulation that the incorporation of graphene materials led to the remodeling of microstructure and inhibited the migration of water in the pores of cement slurry.…”

Section: Durabilitymentioning

confidence: 99%

Recent Progress of Cement-Based Materials Modified by Graphene and Its Derivatives

Zhao

Zhang

2023

Materials

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Graphene, with its excellent properties and unique structure, has been extensively studied in the context of modifiable cement-based materials. However, a systematic summary of the status of numerous experimental results and applications is lacking. Therefore, this paper reviews the graphene materials that improve the properties of cement-based materials, including workability, mechanical properties, and durability. The influence of graphene material properties, mass ratio, and curing time on the mechanical properties and durability of concrete is discussed. Furthermore, graphene’s applications in improving interfacial adhesion, enhancing electrical and thermal conductivity of concrete, absorbing heavy metal ions, and collecting building energy are introduced. Finally, the existing issues in current study are analyzed, and the future development trends are foreseen.

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Section: Durabilitymentioning

confidence: 99%

Recent Progress of Cement-Based Materials Modified by Graphene and Its Derivatives

Zhao

Zhang

2023

Materials

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“…When the sulfate ions are transferred to the tunnel lining concrete, these react with the Ca 2+ generated by the dissolution of CH and C–S–H to form gypsum (CS̅H 2 ) (see eq ). The gypsum (CS̅H 2 ) further reacts with unhydrated aluminates to form ettringite (C 6 AS̅ 3 H 32 ), as shown in eqs –: , …”

Section: Chemo-damage-transport Modelmentioning

confidence: 99%

Resistance to Sulfate Attack and Chemo-Damage-Transport Model of Sulfate Ions for Tunnel Lining Concrete under the Action of Loading and Flowing Groundwater

et al. 2021

ACS Sustainable Chem. Eng.

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In this study, resistance to sulfate attack and a chemo-damage-transport model of sulfate ions for tunnel lining concrete under the action of loading and flowing groundwater are investigated. The results show that in the initial stage of erosion, the relative dynamic elastic modulus of tunnel lining concrete and the sulfate ion concentration increase gradually. However, in the subsequent stage of erosion, the relative dynamic elastic modulus of tunnel lining concrete decreases gradually, and the increase in sulfate ion concentration accelerates. The defects of the tunnel lining concrete in the tensile zone and compressive zone can be expanded and closed, respectively, under the action of the loading. Meanwhile, the tunnel lining concrete can be corroded under the action of flowing groundwater. Therefore, the sulfate ion concentration in the tensile zone is the highest under the action of loading and flowing groundwater. The second highest value is obtained under the action of only flowing groundwater, which is followed by the action of static groundwater. The sulfate ion concentration in the pressure zone is the lowest under the action of loading and flowing groundwater. The chemical reaction in the process of sulfate erosion, damage of tunnel lining concrete by crystallization pressure and loading, and influence of flowing groundwater dissolution on calcium leaching are considered in combination, and a weight coefficient is introduced to characterize the influence of pore structure on the crystallization pressure. Finally, a chemo-damage-transport model of sulfate ions is established and its rationality is verified.

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“…The application of nanoparticles (NPs) in concrete and its potential benefits for improved strength and durability performance are well acknowledged. − This stems from the fact that the application of supplementary cementitious materials (SCM) finer than cement and the resulting improvements in strength and durability increase with increasing fineness of SCM, which is attributed to packing density enhancement and reduction of calcium hydroxide (CH) content. − The adoption of microsilica and subsequently nanosilica (SiNPs) has been attempted to exploit the benefits of improved packing density and pozzolanic reactivity of the material. − In addition to SiNPs, a wide range of NPs including Al 2 O 3 , TiO 2 , Fe 2 O 3 , CaCO 3 , CuO, etc., have been explored to improve the mechanical, thermal, and electrical properties of cement systems. Of the above, SiNPs on account of their superior pozzolanic and microstructure properties have received wider attention from the researchers.…”

Section: Introductionmentioning

confidence: 99%

Development of Colloidal Nanosilver as a High-Workability Nanoadditive for Cement Composites: A Mechanistic Approach

Sata,

Suthar,

Mungule

et al. 2024

ACS Sustainable Chem. Eng.

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The adverse effects on flow and higher replacement dosage are key constraints limiting the large-scale application of nanomaterials in concrete. With a view to addressing the above limitation, the present study discusses the development of colloidal nanosilver (cAgNPs). The Lablab purpureus (L.) pod-based green synthesis adopted enriches cAgNPs with phytochemicals, which synergistically improves the flowability of cement concrete. The contact angle and surface tension measurements confirm its flow affinity. The relative improvement in the performance of designed cAgNPs against commercial nanosilica (SiNPs) was assessed in terms of flow and strength measurements in cement paste specimens. In comparison to SiNPs, inclusion of cAgNPs enhances flow by 80%, while it decreases the superplasticizer requirement by 150%. The compressive strength of both is found to be comparable, while the reactivity as confirmed through TGA and FT-IR is found to be dependent on the binder system. The relative improvement in binding ability with inclusion of cAgNPs is confirmed through FE-SEM and EDS analysis. The above performance improvements are obtained for optimal replacement dosages of 1% and 0.5%, respectively, for cement and blended paste, thus enhancing its economic viability. The ability of cAgNPs to enhance flowability through improved consistency and reduced water demand without compromising strength is a critical departure from conventional nanoparticles and can potentially enhance largescale applications in concrete.

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Electrochemically Exfoliated Graphene for High-Durability Cement Composites

Cited by 13 publications

References 43 publications

Recent Progress of Cement-Based Materials Modified by Graphene and Its Derivatives

Recent Progress of Cement-Based Materials Modified by Graphene and Its Derivatives

Resistance to Sulfate Attack and Chemo-Damage-Transport Model of Sulfate Ions for Tunnel Lining Concrete under the Action of Loading and Flowing Groundwater

Development of Colloidal Nanosilver as a High-Workability Nanoadditive for Cement Composites: A Mechanistic Approach

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