石墨烯与羟基化石墨烯复掺对水泥砂浆性能的影响

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (11): 3968-3975.

石墨烯与羟基化石墨烯复掺对水泥砂浆性能的影响

张逸舟¹, 苏俊儒¹, 郑城¹, 王迎豪¹, 蒲云东¹, 张惠一^1,2, 袁小亚^1,3

1.重庆交通大学材料科学与工程学院,重庆 400074;
2.重庆交通大学土木工程学院,重庆 400074;
3.重庆诺奖二维材料研究院,重庆 400714

收稿日期:2024-06-11 修订日期:2024-07-23 出版日期:2024-11-15 发布日期:2024-11-21
通信作者: 袁小亚,博士,教授。E-mail:yuanxy@cqjtu.edu.cn
作者简介:张逸舟(2000—),女,硕士研究生。主要从事纳米石墨烯基水泥复合材料方面的研究。E-mail:2509312576@qq.com
基金资助:
国家自然科学基金项目(51402030);重庆市技术创新与应用发展专项重点项目(CSTB2022TIAD-KPX0031);重庆市级引导区县科技发展专项资金(JSYY2023010);重庆市研究生导师团队建设项目(JDDSTD2022006);重庆交通大学校企合作项目(cqjt-2022-036);重庆诺奖二维材料研究院科技项目(C2DMI-RD-230616-01)

Effect of Co-Addition of Graphene and Hydroxyl Graphene on Properties of Cement Mortar

ZHANG Yizhou¹, SU Junru¹, ZHENG Cheng¹, WANG Yinghao¹, PU Yundong¹, ZHANG Huiyi^1,², YUAN Xiaoya^1,3

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. Chongqing Nobel Prize 2D Materials Institute, Chongqing 400714, China

Received:2024-06-11 Revised:2024-07-23 Published:2024-11-15 Online:2024-11-21

摘要/Abstract

摘要： 为了解决石墨烯(G)在水泥浆体中易团聚的问题,本文采用分散性较好的羟基化石墨烯(HO-G)与石墨烯复掺的方法来改善石墨烯的团聚现象,研究了不同质量比石墨烯与HO-G复掺对水泥砂浆力学性能和耐久性的影响,并对28 d的砂浆试样进行了MIP、SEM和XRD微观测试。结果表明,石墨烯与HO-G复掺后展现出更显著的增强增韧效果,同时改善了水泥砂浆的耐久性,但对水泥砂浆工作性能影响较小。当石墨烯与HO-G复掺的质量比为3∶7时,水泥砂浆力学性能达到最佳,与空白组相比,28 d抗折强度、抗压强度分别提升了11.1%和26.2%。石墨烯与HO-G复掺能够细化水泥砂浆内部的孔隙,调控水泥水化产物的生长,促使水泥石内部结构更加规整致密,进而提升水泥砂浆试件的耐久性。

关键词: 石墨烯, 羟基化石墨烯, 水泥砂浆, 流动度, 力学性能, 耐久性

Abstract: In this study, in order to solve problem that graphene (G) is easy to agglomerate in cement paste, the co-addition of hydroxyl graphene (HO-G) with better dispersion and graphene was adopted to improve the agglomeration phenomenon of graphene. The effect of co-addition of graphene and HO-G in different mass ratios on mechanical properties and durability of cement mortar was studied. The microscopic tests MIP, SEM and XRD were carried out on mortar specimens after 28 d of curing. The results show that the co-addition of graphene and HO-G in different mass ratios exhibits a more significant strengthening and toughening effect and improves the durability of cement mortar at the same time, but has little impact on the workability of cement mortar. When the mass ratio of co-addition of graphene and HO-G is 3∶7, the mechanical properties of cement mortar are the best. Compared with reference group, the 28 d flexural strength and compressive strength improve by 11.1% and 26.2%, respectively. The co-addition of graphene and HO-G in cement mortar refines the internal pores of mortar, and regulates the growth of cement hydration products, resulting in a more regular and dense internal structure of cement stone, which enhance the durability of cement mortar specimens.

Key words: graphene, hydroxyl graphene, cement mortar, fluidity, mechanical property, durability

中图分类号:

TU528

张逸舟, 苏俊儒, 郑城, 王迎豪, 蒲云东, 张惠一, 袁小亚. 石墨烯与羟基化石墨烯复掺对水泥砂浆性能的影响[J]. 硅酸盐通报, 2024, 43(11): 3968-3975.

ZHANG Yizhou, SU Junru, ZHENG Cheng, WANG Yinghao, PU Yundong, ZHANG Huiyi, YUAN Xiaoya. Effect of Co-Addition of Graphene and Hydroxyl Graphene on Properties of Cement Mortar[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(11): 3968-3975.

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