Effect of Hydroxylated Graphene on Properties of Fly Ash-Cement Matrix Composites

被引：0

作者：

Yuan, Xiaoya ^{[1
,2
,3
]}

Pu, Yundong ^{[1
]}

Gui, Zunyao ^{[1
]}

Zhang, Huiyi ^{[4
]}

Yang, Sen ^{[1
]}

Jin, Zhan ^{[3
]}

Cao, Weiqi ^{[3
,5
]}

机构：

[1] School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing

[2] Institute of Advanced Functional Materials, Chongqing Jiaotong University, Chongqing

[3] Chongqing 2D Materials Institute of China, Chongqing

[4] School of Civil Engineering, Chongqing Jiaotong University, Chongqing

[5] Key Laboratory of Optoelectronic Technology & Systems Ministry of Education, Department of Optoelectronic Engineering, Chongqing University, Chongqing

来源：

Cailiao Daobao/Materials Reports | 2024年 / 38卷 / 11期

基金：

中国国家自然科学基金;

关键词：

cement; durability; fly ash; hydroxylated graphene; mechanical property;

D O I：

10.11896/cldb.23020017

中图分类号：

学科分类号：

摘要：

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 studied. 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. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.

引用

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