Efficient Use of Graphene Oxide in Layered Cement Mortar

Liu, Shuangshuang; Lu, Feng-lei; Chen, Ya; Dong, Biqin; Du, Hong; Li, Xiangyu

doi:10.3390/ma15062181

Cited by 5 publications

(3 citation statements)

References 53 publications

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“…Consequently, the findings of this research demonstrated that the GO incorporation into cement mortar significantly increases its resistance to chloride ion penetration. This is consistent with past studies [23,41]. For the purpose of providing an explanation or a vision of the results obtained, it should be recalled that in the results of gas permeability, related to porosity, in the samples of modified cement mortar with GO, porosity decreased.…”

Section: Chlorides Diffusion In Mortarssupporting

confidence: 91%

Effect of Graphene Oxide on Mechanical Properties and Durability of Cement Mortar

Djenaoucine,

Picazo,

Rubia

et al. 2023

Preprint

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The effect of graphene oxide (GO) on mechanical strengths and durability of cement composites has been studied by preparing GO-modified cement mortars. Thermogravimetric analysis (TGA) and nuclear magnetic resonance (29Si MAS-NMR) were performed on the cement paste to research the influence of GO on the hydration process and chain structure of calcium-silicate-hydrate (C-S-H) gels. In addition, mechanical strength test, such as compressive and flexural, were performed on cement mortars. The addition of GO at 0.05 wt.% (by weight of cement) increased the compressive strength by 9.02% after 28 days. Furthermore, the flexural strength of cement mortars with 0.05 wt.% GO and superplasticizer (SP) after 7 and 28 days increased by 12.26% and 21.86%, respectively, compared with reference mortar. At the same time, the effect of GO proved to be more significant and effective in the durability tests, suggesting that GO can enhance the microstructure through hydration products to create a highly cross-linked micro structure.

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Section: Chlorides Diffusion In Mortarssupporting

confidence: 91%

Effect of Graphene Oxide on Mechanical Properties and Durability of Cement Mortar

Djenaoucine,

Picazo,

Rubia

et al. 2023

Preprint

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“…GO plays a core role in reducing the porosity of the cement matrix during curing the stage. Small amounts of GO, as little as 0.05%wt, increase compressive strength by 15-33% and flexural strength by 41-59% [35][36][37]. There is currently disagreement between the results reported by various researchers on GO-reinforced cement products because other studies [38,39] have found no improvements or even disadvantages [36,37,40].…”

Section: Introductionmentioning

confidence: 99%

Development of Mortars That Use Recycled Aggregates from a Sodium Silicate Process and the Influence of Graphene Oxide as a Nano-Addition

Ruiz Martinez,

Cifuentes,

Rios

et al. 2023

Materials

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This research analyses how different cement mortars behave in terms of their physical and mechanical properties. Several components were necessary to make seven mixes of mortars, such as Portland cement, standard sand, and solid waste from a factory of sodium silicate, in addition to graphene oxide. Furthermore, graphene oxide (GO) was selected to reduce the micropores and increase the nanopores in the cement mortar. Hence, some tests were carried out to determine their density, humidity content, water absorption capacity, open void porosity, the alkali–silica reaction, as well as flexural and mechanical strength and acid resistance. Thus, standard-sand-manufactured mortars’ mechanical properties were proved to be slightly better than those manufactured with recycled waste; the mortars with this recycled aggregate presented problems of alkali–silica reaction. In addition, GO (in a ratio GO/cement = 0.0003) performed as a filler, improving the mechanical properties (30%), alkali–silica (80%), and acid resistance

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“…Moreover, GO exhibits a good bond with the cement matrix, further improving the mechanical properties of cement matrix composites. Many scholars have added GO to the cement matrix to study its influence on the properties of cement-based composites [25][26][27][28][29]. Additionally, GO can be prepared from graphite at a lower cost using an improved Hummers' method, laying a good foundation for its widespread use.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior and Microstructure of Graphene Oxide Electrodeposited Carbon Fiber Reinforced Cement-Based Materials

Wang

et al. 2022

Crystals

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In this study, graphene oxide (GO) was prepared by an improved Hummers’ method, and the graphene oxide–carbon fiber (GO-CF) hybrid fibers were prepared by electrophoretic deposition (EPD) with the above GO. The microstructure and mechanical properties of GO, CF and GO-CF cement matrix composites were studied by X-ray diffraction (XRD), SEM and mechanical tests. X-ray diffraction (XRD) and SEM results showed that the surface modification of CF with GO could effectively improve the dispersion of CF in the cement matrix, the template action of GO providing nucleation sites for cement hydration, which significantly enhanced the interface bond between CF and the cement matrix. The mechanical properties test results showed that the early compressive strength and flexural strength of cement matrix composites were significantly improved by GO. Adding CF into the cement matrix significantly improved the flexural strength, although the compressive strength was not improved, even exhibiting a downward trend when the CF content exceeded 0.5%. The flexural and compressive strength of GO-CF cement matrix composites were clearly improved, its 7 d flexural strength and compressive strength increased by 30.89% and 17.56%, respectively, and its 28 d flexural strength and compressive strength increased by 38.37% and 14.32%, respectively. The research results indicate that a new method was provided which used GO as a dispersant and surface modifier to improve the dispersion of chopped CF in a cement matrix, and the interaction between CF and the cement matrix interface could also be applied to the functional aspects of cement matrix composites.

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Efficient Use of Graphene Oxide in Layered Cement Mortar

Cited by 5 publications

References 53 publications

Effect of Graphene Oxide on Mechanical Properties and Durability of Cement Mortar

Effect of Graphene Oxide on Mechanical Properties and Durability of Cement Mortar

Development of Mortars That Use Recycled Aggregates from a Sodium Silicate Process and the Influence of Graphene Oxide as a Nano-Addition

Mechanical Behavior and Microstructure of Graphene Oxide Electrodeposited Carbon Fiber Reinforced Cement-Based Materials

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