Fabrication of GO/Cement Composites by Incorporation of Few-Layered GO Nanosheets and Characterization of Their Crystal/Chemical Structure and Properties

Lv, Shenghua; Hu, Haoyan; Zhang, Jia; Luo, Xiaoqian; Lei, Ying; Sun, Liankun

doi:10.3390/nano7120457

Cited by 38 publications

(9 citation statements)

References 42 publications

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“…This concrete type can allow effective photocatalytic decomposition of pollutants, including volatile organic compounds, carbon monoxide, chlorophenols and aldehydes generated from automobiles and industrial emissions [66,67,68]. Also, graphene family nanomaterials can be incorporated into cement composites to enhance their mechanical strength and durability, as well as provide self-sensing abilities [69,70,71,72]. Other novel properties of cement-based materials containing nanomaterials are their low electrical resistivity and self-sensing capabilities [73].…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in Nanomaterials for Modern Concrete Infrastructure: Advantages and Challenges

et al. 2019

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Modern concrete infrastructure requires structural components with higher mechanical strength and greater durability. A solution is the addition of nanomaterials to cement-based materials, which can enhance their mechanical properties. Some such nanomaterials include nano-silica (nano-SiO2), nano-alumina (nano-Al2O3), nano-ferric oxide (nano-Fe2O3), nano-titanium oxide (nano-TiO2), carbon nanotubes (CNTs), graphene and graphene oxide. These nanomaterials can be added to cement with other reinforcement materials such as steel fibers, glass, rice hull powder and fly ash. Optimal dosages of these materials can improve the compressive, tensile and flexural strength of cement-based materials, as well as their water absorption and workability. The use of these nanomaterials can enhance the performance and life cycle of concrete infrastructures. This review presents recent researches about the main effects on performance of cement-based composites caused by the incorporation of nanomaterials. The nanomaterials could decrease the cement porosity, generating a denser interfacial transition zone. In addition, nanomaterials reinforced cement can allow the construction of high-strength concrete structures with greater durability, which will decrease the maintenance requirements or early replacement. Also, the incorporation of nano-TiO2 and CNTs in cementitious matrices can provide concrete structures with self-cleaning and self-sensing abilities. These advantages could help in the photocatalytic decomposition of pollutants and structural health monitoring of the concrete structures. The nanomaterials have a great potential for applications in smart infrastructure based on high-strength concrete structures.

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Section: Introductionmentioning

confidence: 99%

Recent Progress in Nanomaterials for Modern Concrete Infrastructure: Advantages and Challenges

et al. 2019

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“…On the 60th day, the reduction rates of the creep coefficients of concrete with 0.02% and 0.08% GO nanosheets by the weight of cement are 6.73% and 9.93%. The possible reason is that GO nanosheets can form a compact microstructure through template effect and self-assembly effect in the cement hydration process [41] (see Figure 6) and transfer the crack energy into the cement matrix to restrain the extension of cracks [38]. Therefore, the higher the dosage of GO nanosheets is, the smaller the creep strain of concrete will be.…”

Section: Resultsmentioning

confidence: 99%

Modeling Shrinkage and Creep for Concrete with Graphene Oxide Nanosheets

Chen

Hua

et al. 2019

Materials

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In this study, the shrinkage and creep of concrete containing graphene oxide (GO) nanosheets were experimentally and theoretically investigated. Experiments for the shrinkage and creep of concrete with 0.02% and 0.08% GO nanosheets by the weight of cement and common concrete were carried out. Subsequently, the influence of GO nanosheets on the shrinkage and creep of concrete was analyzed and discussed. A modified model was developed to accurately predict the shrinkage and creep of concrete containing GO nanosheets after models for predicting shrinkage and creep of common concrete were compared and the influential factors and application scope were determined. Results indicate that: (1) GO nanosheets can increase the shrinkage strain and reduce the creep coefficient of concrete, and (2) a modified ACI209 (92) model can accurately predict the shrinkage and creep of concrete containing GO nanosheets. Factors considering concrete strength can be introduced in the model to improve the model accuracy.

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“…As a new kind of carbon material, graphene oxide (GO) is the intermediate of graphene, which has attracted much research attention because of its high reactivity, high specific surface area and excellent mechanical properties [ 6 , 7 , 8 ]. The existing research on the performance of cement-based materials considered the introduction of GO and exhibited the enormous potential to enhance the mechanical properties and durability of hardened cement-based materials [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. Devi et al [ 21 ] explored the compressive and tensile strengths of the mixtures with 0.08% GO, showing a better result compared to the rest of the mixes, and the sorptivity and permeability of the concrete with GO reduced with an increasing GO content.…”

Section: Introductionmentioning

confidence: 99%

Comparison Study on the Adsorption Behavior of Chemically Functionalized Graphene Oxide and Graphene Oxide on Cement

Wang

Yao

2020

Materials

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Chemical functionalization of graphene oxide (GO) is one kind of advanced strategy to eliminate the negative effects on the flowability of cement with GO. The adsorption behavior of admixture on cement plays a vital role in the flowability of cement-based materials. Herein, the comparison study on the adsorption behavior (including adsorption amount, adsorption kinetics, adsorption isotherms and adsorption layer thickness) of three kinds of chemically functionalized graphene oxides (CFGOs) with different polyether amine branched-chain lengths and GO on cement is reported. The results of CFGOs and GO adsorption data on cement particles were all best fitted with the pseudo-second-order kinetic model, and also conformed to the Freundlich isothermal model, indicating that the adsorption of CFGOs and GO on cement both were multilayer type and took place in a heterogeneous manner. The adsorption of CFGOs and GO on cement was not just physical adsorption, but also engaged chemical adsorption. In contrast to GO, the adsorption behavior of CFGOs on cement represented a lesser adsorption amount, weaker adsorption capacity and thinner adsorption layer thickness. Moreover, the longer the branched-chain length of CFGOs, the greater the decreasing degrees of adsorption amount, adsorption capacity and adsorption layer thickness. Due to the consumption of the carboxyl group (-COOH) by chemical functionalization, the anchoring effect of CFGOs was weaker than GO, and the steric hindrance effect generated from branched-chains which weakened the van der Waals forces among CFGOs layers. Moreover, the steric hindrance effect strengthened with the increasing branched-chain length, thus preventing the cement particles from aggregation, which resulted in satisfactory flowability of CFGOs with incorporation of cement rather than GO.

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Fabrication of GO/Cement Composites by Incorporation of Few-Layered GO Nanosheets and Characterization of Their Crystal/Chemical Structure and Properties

Cited by 38 publications

References 42 publications

Recent Progress in Nanomaterials for Modern Concrete Infrastructure: Advantages and Challenges

Recent Progress in Nanomaterials for Modern Concrete Infrastructure: Advantages and Challenges

Modeling Shrinkage and Creep for Concrete with Graphene Oxide Nanosheets

Comparison Study on the Adsorption Behavior of Chemically Functionalized Graphene Oxide and Graphene Oxide on Cement

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