Effect of graphene quantum dots on fluidity, strength and salt corrosion resistance of cement mortar

GUI Zunyao; PU Yundong; ZHANG Huiyi; YUAN Xiaoya; LI Shaowei; SHAO Weisheng

doi:10.13801/j.cnki.fhclxb.20230810.001

Volume 41 Issue 4

Apr. 2024

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GUI Zunyao, PU Yundong, ZHANG Huiyi, et al. Effect of graphene quantum dots on fluidity, strength and salt corrosion resistance of cement mortar[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 2043-2054. doi: 10.13801/j.cnki.fhclxb.20230810.001

Citation:

GUI Zunyao, PU Yundong, ZHANG Huiyi, et al. Effect of graphene quantum dots on fluidity, strength and salt corrosion resistance of cement mortar[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 2043-2054. doi: 10.13801/j.cnki.fhclxb.20230810.001

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Effect of graphene quantum dots on fluidity, strength and salt corrosion resistance of cement mortar

doi: 10.13801/j.cnki.fhclxb.20230810.001

1.
School of Materials Science and Engineering, Chongqing Jiaotong University , Chongqing 400074, China
2.
School of Civil Engineering, Chongqing Jiaotong University , Chongqing 400074, China
3.
Advanced Functional Materials Research Institute, Chongqing Jiaotong University, Chongqing 400074, China
4.
Chongqing 2D Materials Institute, Chongqing 400714, China
5.
Guangzhou Shunzhuo Energy Technology CO., LTD., Guangzhou 510000, China

Funds: National Natural Science Foundation of China (51402030); Chongqing Technical Innovation and Application Development Special Key Project (CSTB2022TIAD-KPX0031); Key Project of Basic Science and Frontier Technology Research of Chongqing Science and Technology Commission (cstc2017jcyjBX0028); Chongqing Graduate Tutor Team Construction Project (JDDSTD2022006); China High-end Foreign Expert Program (G2022035007L); Natural Science Foundation of Chongqing (Genetic Program) (2022NSCQ-MSX1165); Chongqing Jiaotong University Postgraduate Science and Technology Innovation Project (2023S0090); Chongqing Jiaotong University School Enterprise Cooperation Project (cqjt-2022-036)

Received Date: 2023-06-08
Accepted Date: 2023-07-27
Rev Recd Date: 2023-07-20

Available Online: 2023-08-10

Publish Date: 2024-04-15

Abstract

Abstract

The effect of dispersion of graphene quantum dots (GQDs) in saturated calcium hydroxide solution simulating cement hydration pore fluid was investigated by absorbance test and static settlement test, and the effect of workability, mechanical properties and durability of GQDs blended mortar was studied. The absorbance test and static settling test show that GQDs has excellent dispersion stability in saturated calcium hydroxide solution, and the workability test shows that GQDs has almost no negative effect on the flowability of cement mortar. Mechanical performance tests shows that the 28 days flexural and compressive strength of GQDs increase by 12.3% and 12.5%, compared with ordinary cement mortar at the optimum dose of 0.04wt%, the seepage pressure increases by 175%, and the 120 days compressive corrosion resistance coefficient increases by 14.3%. Microstructure tests show that GQDs could improve pore size distribution, fill nano-pores and improve the compactness of cement mortar.
- graphene,
- workability,
- mechanical properties,
- impermeability,
- microstructure
Long Abstrsct
Innovation Points

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References(40)

References

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