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泡沫混凝土阻抗谱的双曲正切特性
Hyperbolic Tangent Characteristics of Impedance Spectroscopy of Foam Concrete
投稿时间:2016-03-04  修订日期:2016-04-09
DOI:10.3969/j.issn.1007 9629.2017.03.021
中文关键词:  泡沫混凝土  交流阻抗  双曲正切特性  温度
英文关键词:foam concrete  AC impedance  hyperbolic tangent characteristics  temperature
基金项目:临沂大学博士启动基金项目(2016BS036)
           
作者单位
崔玉理
CUI Yuli
临沂大学土木工程与建筑学院,山东临沂276005
School of Civil Engineering and Architecture, Linyi University, Linyi 276005, China
贺鸿珠
HE Hongzhu
同济大学材料科学与工程学院,上海201804
School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
史美伦
SHI Meilun
同济大学材料科学与工程学院,上海201804
School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
尹海涛
YIN Haitao
山东费县住房和城乡建设局,山东费县273400
Feixian Municipal Bureau of Housing and UrbanRural Development, Feixian 273400, China
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中文摘要:
      为研究泡沫混凝土内部的扩散特性,利用电化学法,对比分析了泡沫混凝土与普通混凝土在不同水温、有无发泡剂以及不同浸水时间等条件下的交流阻抗图谱.结果表明:与普通混凝土相比,泡沫混凝土由于存在内部气孔而具有截然不同的细观结构和扩散特性,表现在阻抗谱上,即为其Nyquist图中的曲线是双曲正切型而非Randles型;通过对泡沫混凝土扩散特性与双曲正切曲线的关联,可以求得扩散系数与扩散层厚度等表征其扩散特性的参数.
英文摘要:
      In order to investigate the characteristics of internal diffusion of foam concrete, AC impedance spectroscopy of foam concrete was tested by electrochemical method at different water temperature, the presence or absence of foaming agent and different immersion time. AC impedance spectroscopy of foam concrete and ordinary concrete were researched. The results show that due to existence of inner bubbles in the foam concrete, its microstructure and characteristics of diffusion are different from those of ordinary concrete. In AC impedance spectroscopy, its Nyquist plot is of hyperbolic tangent type rather than Randles type as seen for the ordinary concrete. By correlation between the characteristics of diffusion and the hyperbolic tangent function, diffusion coefficient and depth of diffusion layer can be calculated.
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