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首页> 外文期刊>International Journal of Electrochemical Science >Electrochemical Impedance Spectroscopy Study on Hydration Feature of Calcium Sulfoaluminate Cements
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Electrochemical Impedance Spectroscopy Study on Hydration Feature of Calcium Sulfoaluminate Cements

机译：硫铝酸钙水泥水化特性的电化学阻抗谱研究

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Electrochemical impedance spectroscopy (EIS) was used to study the hydration procedure of calciumsulfoaluminate (CSA) cements as a nondestructive testing method. The CSA cements were prepared bymixing the CSA clinker with commercial micronized natural gypsum. The compressive strengthevolution of mortars prepared from gypsum pastes indicates that the results are in perfect agreement withthe formation of the ettringite. The experimental results indicate that the EIS behavior of CSA cementswas varied with the hydration process and increasing hydration time, as the resistance of ion transportprocesses (R CT ) gradually increased. Furthermore, the R CT and semicircle Nyquist curve in high-frequency reduces gradually by increasing the water cement ratio. The curve of impedance spectrummove to the right by increasing gypsum content in cement paste resulting in the increase of R CT1 withgypsum concentration increasing. The experimental findings show that EIS method is an appropriatetechnique for evaluation of the hydration feature of CSA cements.
机译：电化学阻抗谱（EIS）用于研究无水硫酸钙铝酸盐（CSA）水泥的水合过程。通过将CSA熟料与商业化的微粉化天然石膏混合来制备CSA水泥。由石膏浆制备的砂浆的抗压强度演变表明，该结果与钙矾石的形成完全吻合。实验结果表明，随着离子迁移过程的阻力逐渐增大，CSA水泥的EIS行为随水化过程和水化时间的增加而变化。此外，通过增加水灰比，高频下的R CT和半圆奈奎斯特曲线逐渐减小。随着水泥浆中石膏含量的增加，阻抗谱曲线向右移动，导致R CT1随石膏浓度的增加而增加。实验结果表明，EIS方法是评价CSA水泥水化特性的合适技术。

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