硅酸盐通报2025，Vol.44Issue(7)：2419-2428,10.DOI:10.16552/j.cnki.issn1001-1625.2024.1617
硅烷改性氧化石墨烯增强水泥砂浆的力学性能和抗渗性能
Mechanical Properties and Permeability Resistance of Silane-Modified Graphene Oxide Enhanced Cement Mortar
摘要
Abstract
In order to improve the performance of concrete in harsh environments,γ-(2,3-epoxypropoxy)propyltrimethoxysilane(GOPS)modified graphene oxide(GO)was prepared by sol-gel method to obtain silylated graphene oxide(fGO).Then the cement mortar was filled with fGO and its mechanical properties were measured.The materials were characterized by X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),Raman spectroscopy,scanning electron microscopy(SEM)and transmission electron microscopy(TEM).The results show that compared with GO,the fGO structure is loosely layered,and the siloxane molecules are grafted with GO through the Si-O-C bond.Compared with the control group,fGO has little effect on the slump and slump flow of cement.When the content of fGO is 0.06％(mass fraction),the 28 d flexural strength and compressive strength of cement mortar increase by 26.36％and 36.29％,respectively,and the capillary water absorption and chloride ion diffusion coefficient decrease by 56.64％and 33.16％,respectively.Thermogravimetric and microscopic analysis show that fGO improved the morphology of hydration products,enhance the adhesion between hydration products and sand particles,and improve the integrity and stability of silicate network as a whole.关键词
水泥砂浆/氧化石墨烯/硅烷/氯离子扩散系数/强度Key words
cement mortar/graphene oxide/silane/chloride ion diffusion coefficient/strength分类
建筑与水利引用本文复制引用
黄巍林,于巾茹,尚君,王忠堂..硅烷改性氧化石墨烯增强水泥砂浆的力学性能和抗渗性能[J].硅酸盐通报,2025,44(7):2419-2428,10.基金项目
山东省自然科学基金面上项目(ZR202103020358) （ZR202103020358）
