Influence of Graphene Oxide on Interfacial Transition Zone of Mortar
Influence of Graphene Oxide on Interfacial Transition Zone of Mortar
复制标题
氧化石墨烯对砂浆界面过渡区的影响
DOI：
10.1155/2020/8919681
复制
发表时间：
2020
影响因子：
--
通讯作者：
Feng Xing
中科院分区：
文献类型：
--
作者：
Hongfang Sun;Zhili Ren;Li Ling;Shazim Ali Memon;Jie Ren;Bing Liu;Feng Xing
采用背散射电子显微图像分析技术研究了氧化石墨烯（GO）对水泥砂浆界面过渡区（ITZ）微观结构的影响。结果表明，GO的掺入显著降低了界面厚度。GO的引入降低了砂浆界面和净浆的孔隙率，同时提高了砂浆的抗压强度。GO的加入也缩小了界面处孔隙率与净浆体孔隙率之间的差距，因此砂浆的整体微观结构变得更加均匀。在此基础上，对砂浆抗压强度预测模型进行了修正，以提高预测精度。改进后的预测模型表明，GO细化界面后，界面处的抗压强度与净浆体的抗压强度之间的差异减小。
In this paper, the influence of graphene oxide (GO) on the microstructure of interfacial transition zone (ITZ) in cement mortar was investigated through image analysis (IA) of backscattered electron (BSE) micrographs. The results showed that the incorporation of GO significantly reduced the thickness of ITZ. The porosity in ITZ and bulk paste decreased due to the introduction of GO; meanwhile, the compressive strength of the mortar samples was improved. The addition of GO also narrowed the gap between the porosity of ITZ and bulk paste, and therefore, the entire microstructure of mortar became more homogenous. Based on the above results, the model to predict the compressive strength of mortar was modified for better precision. The improved prediction model indicated that the difference between the compressive strength of ITZ and bulk paste was reduced upon the refinement of ITZ by GO.