The effects of graphene oxide-silica nanohybrids on the workability, hydration, and mechanical properties of Portland cement paste

Mowlaei, Roozbeh; Lin, Junlin; Souza, Felipe Basquiroto de; Fouladi, Amirsina; Korayem, Asghar Habibnejad; Shamsaei, Ezzatollah; Duan, Wenhui

doi:10.1016/j.conbuildmat.2020.121016

Cited by 60 publications

(10 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 6 shows the spreading and Marsh cone flow time for the reference sample and the samples with different mixing quantities of GOS. With the increase of GOS, the spreading of cement pastes gradually decreased; however, the Marsh cone flow time gradually increased, which is consistent with the literature [33,34]. When the GOS increased from 0 to 0.07%, the spreading reduced from 220 mm to 150 mm, a decrease of 31.82%.…”

Section: The Spreading and Marsh Cone Flow Time With Different Concen...supporting

confidence: 90%

“…Therefore, in the middle and later stages of hydration, the GOS that fills in the pores will consume CH to produce a secondary hydration reaction, resulting in more C-S-H gel. On the other hand, the C-S-H gel grown on the GOS layer is tightly connected, which can effectively prevent the propagation of microcracks and effectively improve the bending strength of cement-based materials [33].…”

Section: The Comparison Of Macro Performance For Cement-based Gos And...mentioning

confidence: 99%

See 1 more Smart Citation

The Effects of Graphene Oxide-Silica Nano-Hybrid Materials on the Rheological Properties, Mechanical Properties, and Microstructure of Cement-Based Materials

et al. 2022

View full text Add to dashboard Cite

Despite their excellent performance, two-dimension nanomaterials have certain limitations in improving the performance of cement-based materials due to their poor dispersity in the alkaline environment. This paper has synthesized a new two-dimension stacked GO-SiO2 (GOS) hybrid through the sol-gel method. Nano-SiO2 is coated on the surface of GO with wrinkling characteristics, and the atomic ratio of C, O, and Si in GOS is 1:1.69:0.57. The paper discusses the impacts on the spreading, Marsh cone flow time, rheological properties, mechanical properties, and microstructure of cement-based materials for the GOS at different mixing quantities. Furthermore, with the same mixing quantity of 0.01%, the influences on the dispersity, flow properties, rheological parameters, and mechanical properties of GOS and graphene oxide (GO) are compared. Lastly, fuzzy matrix analysis has been adopted to analyze the comprehensive performance of cement-based materials containing GOS. The research results indicate that, compared with the reference sample, the spreading for the GOS cement mortar with 0.01% mixing quantity was reduced by 4.76%, the yield shear stress increased by 37.43%, and the equivalent plastic viscosity was elevated by 2.62%. In terms of the 28 d cement pastes, the compressive and flexural strength were boosted by 27.17% and 42.86%, respectively. According to the optical observation, GOS shows better dispersion stability in the saturated calcium hydroxide solution and simulated pore solution than GO. Compared with the cement-based materials with the same mixing quantity (0.01%), GOS has higher spreading, lower shear yield stress, and higher compressive and flexural strength than GO. Finally, according to the results of fuzzy matrix analysis, when the concentration of GOS is 0.01%, it presents a more excellent comprehensive performance with the highest score. Among the performance indicators, the most significant improvement was in the flexural properties of cement-based materials, which increased from 8.6 MPa to 12.3 MPa on the 28 d.

show abstract

Section: The Spreading and Marsh Cone Flow Time With Different Concen...supporting

confidence: 90%

Section: The Comparison Of Macro Performance For Cement-based Gos And...mentioning

confidence: 99%

The Effects of Graphene Oxide-Silica Nano-Hybrid Materials on the Rheological Properties, Mechanical Properties, and Microstructure of Cement-Based Materials

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The mechanism of how the SiO 2 nanoparticles prevent GO aggregation in ionic environments was explored in detail in our previous studies. 28,29 Second, the deposited SiO 2 nanoparticles acted as a structure-directing platform for the vertical growth of 2D CSH nanoplates on the surface of GO.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Graphene Oxide-Based Mesoporous Calcium Silicate Hydrate Sandwich-like Structure: Synthesis and Application for Thermal Energy Storage

Shamsaei

Souza

Fouladi

et al. 2022

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

In this study, we designed a mesoporous composite with high latent heat capacity, stable structure, and efficient thermal response for thermal energy storage in green building constructions. Graphene oxide (GO) nanosheets were sandwiched by a vertically interconnected network of two-dimensional (2D) calcium silicate hydrate (CSH) nanoplates via an in situ dissolution−coprecipitation strategy to obtain CSH/GO/CSH (CGC). The CGC mesoporous sandwich-like structures with a high specific surface area (677 m 2 g −1 ) and a large pore volume (∼2.5 cm 3 g −1 ) were infiltrated with lauric acid (LA) as phase change materials (PCMs) to produce LA@CGC composites. Our results demonstrated that LA@CGC had a high latent heat value of 118.0−127.6 J g −1 and 92−99% efficiency after 50 heating− cooling cycles, which, together with the reinforcing properties of GO and the compatibility of CSH in cement-based matrixes, makes the composite a sustainable PCM for thermal energy storage in building constructions.

show abstract

“…Here, three major techniques are applied: (1) mechanical mixing of silica fume with GO water dispersion, prior to cement addition, [ 38 ] (2) the incorporation of GO encapsulated silica fume particles, [ 45 ] and (3) the deposition of nanosilica particles on GO nanosheets via a sol‐gel method by in situ hydrolysis and condensation of tetraethylorthosilicate ( Figure a). [ 46–48 ] Analogously, Wang et al. [ 34 ] have reported that also the addition of fly ash prevents the flocculation of GO, thus increasing the fluidity of GO‐cement mix.…”

Section: Fabrication Protocols For Graphene‐based Cementitious Compositesmentioning

confidence: 97%

“…As aforementioned, an additional approach to fabricate GO‐based cementitious composites relies on the use of silica fume, which plays a double role by ensuring the sufficient dispersion of GO and fluidity of fresh cement mix as well as by initiating the pozzolanic reaction, that is a reaction between silica fume and Ca(OH) 2 resulting in the formation of secondary CSH phase. [ 45–48 ] Nevertheless, the combination of GO and silica fume leads only to the slight increase of mechanical properties of cement composites: the maximum increase of the 28‐day compressive, flexural, and tensile strength up to 33%, [ 46 ] 35%, [ 48 ] and 31%, [ 47 ] respectively, has been reported so far.…”

Section: Microstructure–properties Relationship In Graphene‐based Cementitious Compositesmentioning

confidence: 99%

Graphene‐Based Cementitious Composites: Toward Next‐Generation Construction Technologies

Krystek

Ciesielski

Samorı́

2021

Adv Funct Materials

View full text Add to dashboard Cite

The search for technological solutions to the ever‐increasing demand for ultra‐high‐quality concrete with the simultaneous construction boom represents one of the greatest challenges concrete researchers are facing nowadays. In view of their unique properties, graphene and related materials, when utilized to form graphene‐based cementitious composites, appear to be powerful components to give a boost to today's concrete technology. In this review, the most enlightening recent advancements in the development of fabrication protocols for obtaining the homogenous dispersion of graphene and derivatives thereof within the cement matrix are showcased. The hydration process and basic properties of graphene‐based cementitious materials are also discussed. The integration of graphene‐family materials to concrete technology allows new functions to be imparted to cement composites toward the construction of smart and multifunctional buildings. Therefore, a specific focus is given to the electrical and piezoresistive behavior of graphene‐cement composites, and ultimately their great potential for structural health monitoring applications. The approaches proposed in this review can be also extended to other 2D materials offering the broadest arsenal of physical properties, which can therefore be integrated on‐demand in future smart structures and constructions.

show abstract

The effects of graphene oxide-silica nanohybrids on the workability, hydration, and mechanical properties of Portland cement paste

Cited by 60 publications

References 46 publications

The Effects of Graphene Oxide-Silica Nano-Hybrid Materials on the Rheological Properties, Mechanical Properties, and Microstructure of Cement-Based Materials

The Effects of Graphene Oxide-Silica Nano-Hybrid Materials on the Rheological Properties, Mechanical Properties, and Microstructure of Cement-Based Materials

Graphene Oxide-Based Mesoporous Calcium Silicate Hydrate Sandwich-like Structure: Synthesis and Application for Thermal Energy Storage

Graphene‐Based Cementitious Composites: Toward Next‐Generation Construction Technologies

Contact Info

Product

Resources

About