Influence of Graphene Oxide on Interfacial Transition Zone of Mortar

Sun, Hongfang; Ren, Zhili; Ling, Li; Memon, Shazim Ali; Ren, Jie; Liu, Bing; Xing, Feng

doi:10.1155/2020/8919681

Cited by 11 publications

(4 citation statements)

References 27 publications

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“…Li et al used MIP to study the regulation of GO on ITZ of cement mortar and found that GO promoted the growth of hydration products in ITZ, significantly reduced the number of capillary pores and macropores in ITZ, and made ITZ microstructure more dense, as shown in Figure . Sun et al used backscattered electron imaging technology to study the regulation of GO on ITZ in cement mortar and found that the incorporation of GO reduced the ITZ porosity in cement mortar and reduced ITZ width. In addition, the effect of GO on the ITZ of cement mortar is related to the water–binder ratio.…”

Section: Dispersive Properties Of Gomentioning

confidence: 99%

Catalysis and Regulation of Graphene Oxide on Hydration Properties and Microstructure of Cement-Based Materials

Chen

Xue

et al. 2023

ACS Sustainable Chem. Eng.

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Graphene oxide (GO) is a two-dimensional material that adds functionalized oxygen-containing groups on the surface of graphene through strong acid oxidation. The oxygen-containing functional groups on the surface make GO have good dispersion and surface activity. When GO is incorporated into cement-based materials, while providing nucleation sites for cement hydration, it can also react with ions released by cement hydration. Therefore, GO has a catalytic effect on the hydration process of cement and plays a role in regulating the morphology of the hydration products, which in turn affects the formation of the microstructure of cementbased materials. In this study, the catalytic and regulatory effects of GO on the hydration characteristics, pore structure, and internal interface of cement-based materials are reviewed. The analysis shows that the oxygen-containing functional groups on the surface of GO can absorb a large number of water molecules, promote the dissolution of cement particles in water, and adsorb the Ca 2+ released by cement particles, thereby reducing the concentration of Ca 2+ around the cement particles and shortening the induction period of cement hydration. In addition, GO can provide more nucleation sites for cement hydration and shorten the hydration acceleration period. GO promotes the formation of hydration products through the nucleation effect and gradually transforms needle-like and rod-like hydration products into flower-like or polyhedral-like crystals. In addition, GO optimizes the pore structure of cement-based materials when it affects cement hydration and the morphology of hydration products through the above-mentioned effects. In addition, it makes the connection between hydration products closer through the bridging effect, so that the total porosity of cement-based materials decreases, gel-pore content increases, capillary-pore content decreases, and pore structure is significantly optimized. Finally, while optimizing the pore structure of cement-based materials, GO has an obvious optimization effect on the interface transition zone (ITZ) of cement-based materials, which significantly reduces the ITZ width and increases the ITZ density.

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Section: Dispersive Properties Of Gomentioning

confidence: 99%

Catalysis and Regulation of Graphene Oxide on Hydration Properties and Microstructure of Cement-Based Materials

Chen

Xue

et al. 2023

ACS Sustainable Chem. Eng.

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“…Recent studies have shown that, the addition of GO improves the interfacial transition zone (ITZ) microstructure reducing its thickness and porosity [ 150 , 151 ]. Substantial reduction in water permeability was also reported [ 152 ].…”

Section: Nanomaterials Typically Used In Cement-based Materialsmentioning

confidence: 99%

Nanomaterials in Cementitious Composites: An Update

et al. 2021

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This review is an update about the addition of nanomaterials in cementitious composites in order to improve their performance. The most common used nanomaterials for cementitious materials are carbon nanotubes, nanocellulose, nanographene, graphene oxide, nanosilica and nanoTiO2. All these nanomaterials can improve the physical, mechanical, thermal and electrical properties of cementitious composites, for example increase their compressive and tensile strength, accelerate hydration, decrease porosity and enhance fire resistance. Cement based materials have a very complex nanostructure consisting of hydration products, crystals, unhydrated cement particles and nanoporosity where traditional reinforcement, which is at the macro and micro scale, is not effective. Nanomaterials can reinforce the nanoscale, which wasn’t possible heretofore, enhancing the performance of the cementitious matrix.

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“…Moreover, inclusion of GO has a crucial role in the porosity reduction of the interfacial transition zone (ITZ) in mortars; also, a decline in the thickness and volume fraction of ITZ is found up to 11.64% and 11.77%, respectively. 13 It is reported that adding 0.03% and 0.04% GO to mortar specimens results in the rich formation of flower type polyhedron crystals. 14 In another research, it was observed that adding 0.02%-0.06% GO to ultra-high performance concrete decreased the total porosity between 16.6% and 33.8%.…”

Section: Introductionmentioning

confidence: 99%

“…Based on the study by Duan et al, 12 the porosity decreased by about 6.5% by adding 0.035% GO to the cement paste sample. Moreover, inclusion of GO has a crucial role in the porosity reduction of the interfacial transition zone (ITZ) in mortars; also, a decline in the thickness and volume fraction of ITZ is found up to 11.64% and 11.77%, respectively 13 . It is reported that adding 0.03% and 0.04% GO to mortar specimens results in the rich formation of flower type polyhedron crystals 14 .…”

Section: Introductionmentioning

confidence: 99%

Influence of ground granulated blast furnace slag on mechanical properties and durability of graphene oxide‐reinforced cementitious mortars

Hosseini

Atrian

Mirvalad

et al. 2023

Structural Concrete

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In recent decades, considering environmental issues, partial replacement of Portland cement with supplementary cementitious material (SCM), namely ground granulated blast furnace slag (GGBS), has been in the spotlight of research. On the other hand, carbon‐based nanomaterials, especially graphene oxide (GO), are recognized as an extraordinary additive with special characteristics that can be included in cementitious materials. In this research, the impact of GGBS on the mechanical properties and durability of GO‐modified mortars was investigated at 28 and 90 days. The results demonstrate that by increasing the content of GGBS, a decrease in the flexural and compressive strength compared to plain cement sample was seen. On the other hand, incorporation of GGBS and GO led to higher strength compared to GO‐cement mortar. Also, the compressive strength of the sample containing 20% GGBS and 0.03% GO was 38.7% higher than the plain cement sample at 90 days. On the other hand, adding GGBS to a GO‐reinforced sample resulted in a more durable specimen against chloride and acid environments. The sample made of 40% GGBS in GO‐modified mortar not only has the best efficiency in harsh environments but also has the lowest water absorption. This mortar improved the migration coefficient, mass loss in HCl solution, and initial sorptivity by 20.1%, 57.7%, and 37.1%, respectively. Moreover, the mentioned sample had a denser microstructure with smaller cracks compared to other samples, based on scanning electron microscope (SEM) images.

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Influence of Graphene Oxide on Interfacial Transition Zone of Mortar

Cited by 11 publications

References 27 publications

Catalysis and Regulation of Graphene Oxide on Hydration Properties and Microstructure of Cement-Based Materials

Catalysis and Regulation of Graphene Oxide on Hydration Properties and Microstructure of Cement-Based Materials

Nanomaterials in Cementitious Composites: An Update

Influence of ground granulated blast furnace slag on mechanical properties and durability of graphene oxide‐reinforced cementitious mortars

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