Research of Electrical and Hydration Behavior of Phosphoaluminate Cementitious Material

Ming Zhang; Zhu Ding; Peng Liu; Ming Ke Wang; Feng Xing

doi:10.4028/www.scientific.net/AMR.129-131.926

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 129-131Research of Electrical and Hydration Behavior of...

Research of Electrical and Hydration Behavior of Phosphoaluminate Cementitious Material

Abstract:

Electrodeless resistivity and impedance spectroscopy measurement are reliable equipments of test online for monitoring the hydration process of cement-based materials continuously and accurately. Phosphoaluminate cement (PAC) sets quickly and develops high early strength. In order to understand the mechanism, the hydration products and microstructure formation of PAC in early age need to be studied. In the study, early hydration process and impedance spectroscopy characteristics of PAC with different dosage of retarder were investigated. According to the test, resistivity of freshly mixed PAC paste decreases sharply and then rises slowly, some characteristic peaks appear at different hydration stages of PAC, which indicates the hydration process of PAC includes four stages which are dissolution, induction, acceleration and deceleration. Impedance spectroscopy can reflect the change of micro-structure and ion concentribution of PAC matrix by resistance and capacitance.

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Periodical:

Advanced Materials Research (Volumes 129-131)

Pages:

926-930

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.129-131.926

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Online since:

August 2010

Authors:

Ming Zhang, Zhu Ding, Peng Liu, Ming Ke Wang, Feng Xing

Keywords:

AC Impedance Spectroscopy (ACIS), Electrodeless Resistivity Measurement, Hydration, Phosphoaluminate Cement (PAC)

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