Spectral induced polarization of low-pH cement and concrete
Spectral induced polarization of low-pH cement and concrete
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DOI：
10.1016/j.cemconcomp.2019.103397
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发表时间：
2019-11
影响因子：
10.5
通讯作者：
P. Leroy;A. Hördt;S. Gaboreau;E. Zimmermann;F. Claret;M. Bücker;Hermann Stebner;J. Huisman
中科院分区：
文献类型：
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作者：
P. Leroy;A. Hördt;S. Gaboreau;E. Zimmermann;F. Claret;M. Bücker;Hermann Stebner;J. Huisman
混凝土是民用和工业基础设施最常用的材料。在核废料的地质处置的背景下，混凝土性能可能会在与宿主地层接触时劣化。因此，使用光谱激发极化（SIP）方法监测混凝土性能变化的能力是非常感兴趣的。在我们的研究中，SIP实验室测量在100 mHz至45 kHz的频率范围内进行了低pH值水泥和混凝土。这些材料表现出非常高的电阻率（大多数高于10 kΩ m）和测量电压和注入电流之间的高相移（大多数高于100 mrad）。复电阻率测量解释使用电化学和微结构膜和麦克斯韦-瓦格纳极化模型。从SIP中获得了有关平均孔径、孔径分布和连接孔隙率的相关信息，从而开辟了使用我们的方法来现场监测混凝土稳定性的可能性。
Concrete is the most used material for civil and industrial infrastructures. In the context of a geological disposal of nuclear waste, concrete performance may be degraded when in contact with the host formation. The ability to monitor the changes of the concrete properties using the spectral induced polarization (SIP) method is therefore of great interest. In our study, SIP laboratory measurements in the 100 mHz to 45 kHz frequency range were carried out on low-pH cement and concrete. These materials exhibited a very high resistivity (mostly above 10 kΩ m) and a high phase shift (mostly above 100 mrad) between measured voltage and injected current. The complex resistivity measurements were interpreted using electrochemical and microstructural membrane and Maxwell-Wagner polarization models. Relevant information on the mean pore size, pore size distribution, and connected porosity was obtained from SIP, opening up the possibility of using our approach to monitor concrete stability in-situ.