Improvement in concrete resistance against water and chloride ingress by adding graphene nanoplatelet

Du, Hongjian; Gao, Hongchen Jacey; Pang, Sze Dai

doi:10.1016/j.cemconres.2016.02.005

Cited by 252 publications

(121 citation statements)

References 44 publications

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“…Concrete is an inherently defective material; its F-T performance relies predominantly upon the interior structure of the material, such as its porousness, crack, pores types and size, transportation, etc. Many researchers have paid attention to the usage of nanomaterials, for example, nano-kaolinite clay [1], nano-silica [2][3][4], nano-TiO 2 [5], nanoalumina [6] and graphene nanomaterials [7][8][9][10][11][12][13][14][15][16][17][18][19][20], in the last decade. Studies have shown that the additive of these nanomaterials could improve the mechanical property and durability of cementitious materials.…”

Section: Introductionmentioning

confidence: 99%

“…Some studies demonstrated that the addition of GO could promote hydration of cement, accelerate crystallite formation and increase the tightness of cement paste [11]. Du et al [12] firstly investigated the durability of concrete containing low-cost…”

Section: Introductionmentioning

confidence: 99%

“…Some recent research findings showed that graphene nano-sheets and their derivatives (GND) could modify cement-based materials [21]; we found that most recent attention focuses on the performance of graphene-based materials additions in cementitious materials, which can improve the better performance, such as compressive strength and flexural strength and elastic modulus of paste. Currently, little information is given to the properties of graphene modified concrete; unique experimental work has been done and demonstrated that GNP could improve transport resistance of concrete, but it reported that graphene has no influence on the compressive properties of concrete [12]. This is inconsistent with the effect of graphene on cement paste; therefore, much research about that graphene modified concrete and effects of graphene on durability of concrete should be done.The objective of the paper is to research the effects of GNP addition on F-T resistance.…”

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confidence: 99%

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Graphene Nanoplatelets Impact on Concrete in Improving Freeze-Thaw Resistance

Chen

Yang

et al. 2019

Applied Sciences

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Graphene nanoplatelets (GNP) is a newly nanomaterial with extraordinary properties. This paper investigated the effect of GNP on the addition on freeze-thaw (F-T) resistance of concrete. In this experimental study, water to cement ratio remained unchanged, a control mixture without GNP materials and the addition of GNP was ranging from 0.02% to 0.4% by weight of ordinary Portland cement was prepared. Specimens were carried out by the rapid freeze-thaw test, according to the current Chinese standard. The workability, compressive strength, visual deterioration and mass loss of concrete samples were evaluated. Scanning electron microscopy also applied in order to investigate the micromorphology inside of the concrete. The results showed that GNP concrete has a finer pore structure than ordinary concrete; moreover, the workability of GNP concrete reduced, and the compressive strength of specimens was enhanced within the appropriate range of GNP addition; in addition, GNP concrete performed better than the control concrete in the durability of concrete exposed to F-T actions. Specimens with 0.05% GNP exhibited the highest compressive property after 200 F-T cycles compared with other samples. Appl. Sci. 2019, 9, 3582 2 of 12 two-dimensional (2D) Graphene Nanoplatelets (GNP), and evaluated the transport properties of concrete subjected to chloride and water environment, the results showed that GNP could enhance the resistance of concrete to chloride ion and water penetration. Mohammed et al. [15] found that GO addition could modify the microstructure and improve the compressive strength of cement matrix, and reported the GO could improve the freeze-thaw resistance of cement;however, they did not give the optimum dosage of GO. Experimental investigation showed that the addition of graphene oxide nanoplatelets (GOS) and GNP in mortar samples would increase the frost resistance of materials, and the discovered microstructure and modulus biography found that GNP and GOS could greatly refine the microstructure of mortar specimen [16]. Li et al. [17] firstly studied GO aggregates as particle size measurement and found that the aspect ratio of GO aggregates is much higher than that of the original GO nanosheets. Adding graphene and GO sheets to cement paste could improve the mechanical properties of the nanocomposite [20] but can reduce the workability of the nano cement materials [13]. Additionally, adding graphene nano-sheets (GNS) to cement paste could accelerate the hydration reaction and increase the quantity of hydration products, and could also improve chloride penetration resistance of cement paste [19]. Furthermore, adding GNP in cement would reduce the resistivity and make composites obvious pressure sensitivity [18]. Some recent research findings showed that graphene nano-sheets and their derivatives (GND) could modify cement-based materials [21]; we found that most recent attention focuses on the performance of graphene-based materials additions in cementitious materials, which can improve the better performanc...

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Graphene Nanoplatelets Impact on Concrete in Improving Freeze-Thaw Resistance

Chen

Yang

et al. 2019

Applied Sciences

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“…However, graphene has very high production cost as well as difficulties with dispersion, which, in turn, limits its application in civil infrastructure especially like bridges, dams and buildings. Some previous studies have found that graphene nanoplatelets (2D carbon based nanomaterials) are cost competitive and can enhance cement composites strain-sensing and transport properties [10,11]. Furthermore, it can be obtained from naturally available graphite flakes (inexpensive source) after chemical oxidation and exfoliation.…”

Section: Introductionmentioning

confidence: 99%

Influence of Graphene Nanosheets on Rheology, Microstructure, Strength Development and Self-Sensing Properties of Cement Based Composites

et al. 2018

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In this research, Graphene oxide (GO), prepared by modified hammer method, is characterized using X-ray Diffraction (XRD), Fourier Transform Infrared (FT-IR) Spectrometry and Raman spectra. The dispersion efficiency of GO in aqueous solution is examined by Ultraviolet-visible spectroscopy and it is found that GO sheets are well dispersed. Thereafter, rheological properties, flow diameter, hardened density, compressive strength and electrical properties of GO based cement composite are investigated by incorporating 0.03% GO in cement matrix. The reasons for improvement in strength are also discussed. Rheological results confirm that GO influenced the flow behavior and enhanced the viscosity of the cement based system. From XRD and Thermogravimetric Analysis (TGA) results, it is found that more hydration occurred when GO was incorporated in cement based composite. The GO based cement composite improves the compressive strength and density of mortar by 27% and 1.43%, respectively. Electrical properties results showed that GO-cement based composite possesses self-sensing characteristics. Hence, GO is a potential nano-reinforcement candidate and can be used as self-sensing sustainable construction material.

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“…At present, graphene oxide is also used as a structure-forming component for hydration hardening binders (Chuah, Pan, Sanjayan, Wang, & Duan, 2014;Lin, Wei, & Hu, 2016), which leads to an increase in the strength properties of composites based on hydraulic binders (Fedorova, Aleksandrov, Skryabin, & Baishev, 2018;Shang, Zhang, Yang, Liu, & Liu, 2015) and air hardening binders (Kondakov & Mikhaleva, 2014;Du, H., Gao & Pang, 2016). After analyzing the studies on adding ultrafine soot (Sarajkina et al, 2015) to the composition of cement-based composite materials (Flores Medina, Barbero-Barrera, & Bustamante, 2016; Flores Medina & Barbero-Barrera, 2017), it was suggested that dispersions with an active component in the form of nanosized soot can manifest a structuring effect similar to the effect of modification with additives based on synthesized graphene.…”

Section: Experimental Processmentioning

confidence: 99%

Structure formation of construction materials modified with natural and man-made nanoadditives

Polyanskikh

Yakovlev

Pervushin

et al. 2019

Modern Building Materials, Structures and Techniques (MBMST)

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The article focuses on the study of influence of natural and man-made nanoformations (chrysotile fibers, carbon black, and graphite) on the formation of the structure of the material based on a hydraulic binder. The data on the positive effect of the optimal amount of modifying dispersions on the physical and technical properties of the samples were obtained. On average, the increase in compressive and bending strength, when using the considered additives, is from 10 to 40%. The results of the study of the microstructure and IR spectra of the check and modified compositions show that adding natural and man-made nanosystems provides optimal conditions for the formation of strong, dense new formations in the cement matrix. In general, the data obtained prove the effectiveness of their use in comparison with synthesized carbon nanosystems.

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Improvement in concrete resistance against water and chloride ingress by adding graphene nanoplatelet

Cited by 252 publications

References 44 publications

Graphene Nanoplatelets Impact on Concrete in Improving Freeze-Thaw Resistance

Graphene Nanoplatelets Impact on Concrete in Improving Freeze-Thaw Resistance

Influence of Graphene Nanosheets on Rheology, Microstructure, Strength Development and Self-Sensing Properties of Cement Based Composites

Structure formation of construction materials modified with natural and man-made nanoadditives

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