羟基化石墨烯对粉煤灰-水泥基复合材料性能的影响

doi:10.11896/cldb.23020017

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Abstract At present, graphene reinforced cement-based materials are the research focus in this field, but the dispersion of graphene is the key of this kind of research. Therefore, in this work, the influence of different amounts (0.01wt%, 0.03wt%, 0.05wt%, 0.07wt%, 0.09wt%) of hydroxy fossil graphene (HO-G) without carboxyl group on the workability, mechanical properties and durability of fly ash-cement system was stu-died. Compared with the fly ash-cement system, the fluidity test showed that HO-G has little effect on the fluidity of the fresh fly ash-cement mortar paste. The mechanical property test showed that HO-G can enhance the mechanical properties of the fly ash-cement mortar, especially when the content of HO-G is 0.03wt%, its 28 d flexural and compressive strength increases by 12.40% and 18.48%, respectively. The test results of sulfate corrosion resistance and chloride ion penetration resistance showed that the addition of HO-G can also improve the durability of the fly ash-cement mortar. The microscopic test showed that there is a synergistic effect between fly ash and HO-G. HO-G can accelerate the secondary hydration reaction of fly ash to promote the formation of more hydrated crystals in the fly ash-cement system. With its template effect, it can further regulate the growth mode of hydrated crystals and control the crystal arrangement structure, thus improving the microscopic morphology of fly ash-cement matrix.

Key words： hydroxylated graphene cement fly ash mechanical property durability

Published: Online: 2024-06-25

CLC number:

TU528

Fund:National Natural Science Foundation of China(51402030), Technology Innovation and Application Development Special Key Project of Chongqing (CSTB2022TIAD-KPX0031), Chongqing Municipal Level to Guide the District and County of Science and Technology Deve-lopment of Special Funds (JSYY2023010), Chongqing Graduate Tutor Team Construction Project (JDDSTD2022006), School-enterprise Cooperation Project of Chongqing Jiaotong University (cqjt-2022-036), Chongqing Nobel Prize Two-dimensional Materials Research Institute Science and Technology Project (C2DMI-RD-230616-01).

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	Articles by authors
	YUAN Xiaoya
	PU Yundong
	GUI Zunyao
	ZHANG Huiyi
	YANG Sen
	JIN Zhan
	CAO Weiqi

Cite this article:

YUAN Xiaoya,PU Yundong,GUI Zunyao, et al. Effect of Hydroxylated Graphene on Properties of Fly Ash-Cement Matrix Composites[J]. Materials Reports, 2024, 38(11): 23020017-8.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.23020017 OR http://www.mater-rep.com/EN/Y2024/V38/I11/23020017

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