材料科学
水泥
复合材料
抗弯强度
固化(化学)
抗压强度
介电谱
微观结构
电化学
电解质
奈奎斯特图
电极
化学
物理化学
作者
Shiqi Song,Linhua Jiang,Shaobo Jiang,Xiancui Yan,Nanping Xu
标识
DOI:10.1016/j.conbuildmat.2018.01.011
摘要
The purpose of the research work is to investigate the mechanical properties and electrochemical behavior of cement paste containing nano-MgO (NM) which cured at different temperature. The measurements of flexural strength, compressive strength and electrochemical impedance spectroscopy were conducted. A suitable electrochemical equivalent mode was applied to fit the measured electrochemical impedance data (Nyquist curve), therefore the electrochemical property for cement paste containing NM can be quantitatively obtained. Results demonstrated that the flexural and compressive strength gradually increased with the increasing of NM contents ranged from 0 wt% to 9 wt% in cement paste. Moreover, the strength of the cement paste containing NM was increased gradually when the curing temperature rising from 20 °C to 60 °C. In addition, with the increasing of NM content and the rising of curing temperature, the electrolyte solution resistance Rs and the ion transport processes resistance Rct1 showed increasing tendency. And XRD, TG-DSC and SEM were used to characterize the phases, mass/heat changes and microstructure of the hardened cement pastes, which provided some evidence on these research findings.
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