Walter Janusz, Uthayakumar Marimuthu, Balamurugan Ponnambalam, Mierzwiński Dariusz
Department of Materials Engineering, Faculty of Materials Engineering and Physics, Tadeusz Kosciuszko Cracow University of Technology, 37 John Paul II Avenue, 31-864 Cracow, Poland.
Faculty of Mechanical Engineering, Kalasalingam Academy of Research and Education, Krishnankoil 626126, India.
Materials (Basel). 2021 Sep 28;14(19):5648. doi: 10.3390/ma14195648.
The variable frequency conductivity was applied to characterize the process of solidification of geopolymers based on fly ash with sand additives. XRD qualitative and quantitative analysis, porosity measurements, and sorption analysis of specific surface area were performed. The conductivity was correlated with porosity and specific surface area of geopolymer concretes. Both values of conductivity, real and imaginary parts, decreased during polymerization processing time. Characteristic maximum on graphs describing susceptance vs. frequency curve was observed. The frequency of this maximum depends on time of polymerization and ageing, and can also indicate porosity of material. Low-porous geopolymer concrete shows both low-conductivity values, and susceptance maximum frequency peak occurs more in the higher frequencies than in high-porous materials.
采用变频电导率来表征基于粉煤灰并添加砂的地质聚合物的固化过程。进行了X射线衍射（XRD）定性和定量分析、孔隙率测量以及比表面积的吸附分析。电导率与地质聚合物混凝土的孔隙率和比表面积相关。在聚合处理时间内，电导率的实部和虚部值均下降。观察到描述电纳与频率曲线的图表上有特征最大值。该最大值的频率取决于聚合和老化时间，也可指示材料的孔隙率。低孔隙率的地质聚合物混凝土显示出较低的电导率值，并且与高孔隙率材料相比，电纳最大频率峰值出现在更高频率处。
