Effect of fly ash on rheological properties of graphene oxide cement paste

Wang, Qin; Cui, Xinyou; Wang, Jian; Li, Shiyu; Lv, Chunxiang; Dong, Yue

doi:10.1016/j.conbuildmat.2017.01.126

Cited by 176 publications

(49 citation statements)

References 22 publications

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“…With the advancement in nanotechnology, researchers are emphasizing more on the effect of nanomaterials on cement composite [3]. Numerous researchers studied the effect of various engineered nanomaterials on flow characteristics of the cement paste [4][5][6] and most of the research was focused on the rolled sheets of graphene and its derivatives, i.e., CNTs (carbon nanotubes) and graphene oxide [6][7][8]. However, the rheological properties of graphene cement paste remained unexplored and rarely reported.…”

Section: Introductionmentioning

confidence: 99%

A Sustainable Graphene Based Cement Composite

et al. 2017

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Abstract:The rheological properties of fresh cement paste with different content of graphene nanoplatelets (GNPs), different shear rate cycles and resting time was investigated. The rheological data were fitted by the Bingham model, Modified Bingham model, Herschel-Bulkley model and Casson model to estimate the yield stress and plastic viscosity, and to see trend of the flow curves. The effectiveness of these rheological models was expressed by the standard error. Test results showed that yield stress and plastic viscosity increased with the increase in the content of graphene in the cement based composite and resting time while the values of these parameters decreased for higher shear rate cycle. In comparison to control sample, the GNP cement based composite showed 30% increase in load carrying capacity and 73% increase in overall failure strain. Piezo-resistive characteristics of GNP were employed to evaluate the self-sensing composite material. It was found that, at maximum compressive load, the electrical resistivity value reduced by 42% and hence GNP cement based composite can be used to detect the damages in concrete. Finally, the practical application of this composite material was evaluated by testing full length reinforced concrete beam. It was found that graphene-cement composite specimen successfully predicted the response against cracks propagation and hence can be used as self-sensing composite material.

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Section: Introductionmentioning

confidence: 99%

A Sustainable Graphene Based Cement Composite

et al. 2017

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“…They found that the influence of GO on compressive strength was greater than that on tensile strength. Qin et al [19] have found that when 0.01 wt% and 0.03 wt% GO was added into concrete containing a certain amount of fly ash, the influence on flexural strength was greater than the influence on compressive strength. Chen et al [20] discovered similar trends for GO carbon-fiber cement composites.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Shrinkage Behavior of Concrete-Containing Graphene-Oxide Nanosheets

Chen

Hua

et al. 2020

Materials

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Graphene oxide (GO) has been widely used as an additive due to its numerous unique properties. In this study, the compressive strength, flexural strength and elasticity modulus of concrete containing 0.02 wt%, 0.05 wt % and 0.08 wt % GO, and its dry shrinkage performance have been experimentally investigated. After the sample preparation, apparatus for compression test and flexural test were used to test the relevant properties of concrete containing GO. The dial indicators were used to measure the shrinkage of samples. The results indicate that GO can considerably improve the compressive strength, flexural strength, and elasticity modulus of concrete at the concrete age of 28 days by 4.04–12.65%, 3.8–7.38%, and 3.92–10.97%, respectively, which are substantially smaller than the increment at the age of 3 d by 5.02–21.51%, 4.25–13.06%, and 6.07–27.45% under a water-cement ratio of 0.35. It was also found that GO can increase the shrinkage strain of concrete. For example, at the age of 60 days, 0.02 wt%, 0.05 wt% and 0.08 wt% GO can increase the shrinkage strain of ordinary concrete by 1.99%, 5.79% and 7.45% respectively under a water-cement ratio of 0.49. The study has advanced our understanding on mechanical and shrinkage behavior of concrete containing GO.

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“…As a nanomaterial, GO was documented may have an influence on the fresh properties of the mixtures [21]. Since that, the fresh properties of graphene oxide have been tested by ASTM standard.…”

Section: Flow Air Content Of Fresh Mixturesmentioning

confidence: 99%

“…Since that, the fresh properties of graphene oxide have been tested by ASTM standard. Fresh cement material always illustrated as yield stress fluids [21,22], and the fresh properties of the mixtures have directly influence on the hardened composite. Thus, in this experiment, the air content and flow properties of GO composites have been evaluated.…”

Section: Flow Air Content Of Fresh Mixturesmentioning

confidence: 99%

Strength Properties and Micro-structure of Steel Slag Based Hardened Cementitious Composite with Graphene Oxide

Li¹,

Kim²

2017

MATEC Web Conf.

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Abstract. For the rapid hardening of concrete, various types of calcium aluminate composite have been used for special purpose as shotcrete or rapid repairing in construction field. However, high cost of calcium aluminates is demerit in the point of expanding usage. In recent years, a new binder for rapid hardening has been introduced as the pulverized ladle furnace slag (RC-LFS) with main components of C12A7 and β-C2S. Like other traditional cementitious materials, it's use will preserve natural resources and has high environmental advantage with economic efficiency, by transferring the industry byproducts into high value materials. Even though flake state, graphene oxide has high tensile strength and electric conductivity. Then, it can be used to increase strength and thermal properties of concrete and its efficiency depends on the dispersion in the cement matrix. In this paper, we used graphene oxide for increasing the engineering properties in RC-LFS concrete with GGBFS. Test results showed that the 0.05w% of graphene oxide increase the flexural strength to 26% and compressive strength to 16%.

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Effect of fly ash on rheological properties of graphene oxide cement paste

Cited by 176 publications

References 22 publications

A Sustainable Graphene Based Cement Composite

A Sustainable Graphene Based Cement Composite

Mechanical Properties and Shrinkage Behavior of Concrete-Containing Graphene-Oxide Nanosheets

Strength Properties and Micro-structure of Steel Slag Based Hardened Cementitious Composite with Graphene Oxide

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