首页|基于电化学阻抗谱的石灰石粉硬化水泥浆体孔结构演化研究

基于电化学阻抗谱的石灰石粉硬化水泥浆体孔结构演化研究

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  • 国家科技期刊平台
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为了研究大掺量(质量分数为20％以上)石灰石粉硬化水泥浆体的孔结构演化行为，本文基于电化学阻抗谱(EIS)、压汞(MIP)测试分析，探究大掺量石灰石粉对硬化水泥浆体EIS拓扑结构和孔结构参数的影响规律，并建立大掺量石灰石粉硬化水泥浆体的微观结构等效电路，研究等效电路中元器件和孔结构参数之间的关系。结果表明:随水化龄期的延长，石灰石粉掺量对EIS拓扑结构参数中Bode角和θmax的影响规律显著，大掺量石灰石粉硬化水泥浆体的孔径分布整体由大孔和毛细孔向过渡孔和凝胶孔发展演化;另外，EIS等效电路中电阻随硬化水泥浆体中毛细孔含量的增加而减小，电容随硬化水泥浆体中凝胶孔含量的增加而减小。
Pore Structure Evolution of Limestone Powder Hardened Cement Slurry Based on Electrochemical Impedance Spectroscopy
In order to study the pore structure evolution behavior of the hardened cement slurry with high-dosage(mass fraction above 20％)limestone powder,based on electrochemical impedance spectroscopy(EIS)and mercury porosimetry(MIP)test analysis,the influence of high-dosage limestone powder on the EIS topological structure and pore structure parameters of the hardened cement slurry were explored.The microstructural equivalent circuit of hardened cement slurry with high-dosage limestone powder was established,and the relationship between components in the equivalent circuit and pore structure parameters was studied.The results show that the effect of limestone powder content on the EIS topological parameters of Bode angle and θmax is significant with the increase of hydration age,and the pore size distribution of the hardened cement slurry with high-dosage limestone powder content is roughly evolved from large pores and capillary pores to transition pores and gel pores.In addition,the resistance of EIS equivalent circuit decreases with the increase of capillary pore content in hardened cement slurry,and the capacitance decreases with the increase of gel pore content in hardened cement slurry.

limestone powderhardened cement slurrypore structureelectrochemical impedance spectroscopyequivalent circuit

朱鹏飞、余熠、石研然、杨恒、何旸、徐菲、蒋林华、储洪强、徐天磊、徐宁

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南京水利科学研究院材料结构研究所,南京 210024

河海大学力学与材料学院,南京 210098

石灰石粉 硬化水泥浆体 孔结构 电化学阻抗谱 等效电路

中央级公益性科研院所基本科研业务费专项资金中央级公益性科研院所基本科研业务费专项资金中央级公益性科研院所基本科研业务费专项资金

Y422007Y420017Y422001

2024

硅酸盐通报
中国硅酸盐学会 中材人工晶体研究院

硅酸盐通报

CSTPCD北大核心
影响因子：0.698
ISSN：1001-1625
年,卷(期)：2024.43(1)
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