Chloride Ion Diffusion and Sulfate Resistance of Graphene Nanosheet Plate Reinforced Cement Mortar
YING Jingwei1,2,*, SU Feiming1, XI Xiaoying1, LIU Jianhui1
1 School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China 2 Institute of Science and Technology for Carbon Peak and Neutrality, Guangxi University, Nanning 530004, China
Abstract: The influence of graphene nanosheet plate (GNP) on chloride ion diffusion resistance and sulfate corrosion resistance of cement mortar was studied in this work. The micro-morphology and classification of hydration products of GNP composite cement mortar were characterized by thermogravimetry, mercury intrusion analysis, X-ray diffraction, scanning electron microscopy and energy spectrum analysis, and the mechanism of GNP enhancing chloride ion diffusion resistance and sulfate corrosion resistance of cement mortar was explained. The results show that compared with common cement mortar, the compressive and flexural strength of cement mortar increased by 11.1% and 12.7%, respectively, after adding 0.1% GNP by 28 days, and the apparent chloride ion concentration and diffusion coefficient decreased by 36.8% and 11.3%, respectively. GNP has no effect on the product category of cement hydration, but GNP can promote the hydration reaction of cement and refine the pore size in cement mortar; as a nano additive in cement, GNP can be filled near cement clinker, increasing the compact of the cement mortar, and the large specific surface area and two-dimensional plate structure of GNP can also serve as a physical barrier for corrosive ions.
通讯作者:
* 应敬伟,广西大学土木建筑工程学院副教授、硕士研究生导师。2006年平顶山工学院土木工程专业本科毕业,2009年广西大学结构工程专业硕士毕业,2013年同济大学结构工程专业博士毕业。目前主要从事新型结构材料、混凝土耐久性等方面的研究工作。发表论文30余篇,包括《土木工程学报》《建筑材料学报》、ASCE-Journal of Materials in Civil Engineering、Construction and Building Materials等。yingjingwei@gxu.edu.cn
引用本文:
应敬伟, 苏飞鸣, 席晓莹, 刘剑辉. 石墨烯纳米片增强水泥砂浆的抗氯离子扩散和抗硫酸盐侵蚀性能[J]. 材料导报, 2024, 38(9): 22090282-9.
YING Jingwei, SU Feiming, XI Xiaoying, LIU Jianhui. Chloride Ion Diffusion and Sulfate Resistance of Graphene Nanosheet Plate Reinforced Cement Mortar. Materials Reports, 2024, 38(9): 22090282-9.
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2024, Vol. 38 
