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Hyperbolic method to analyze the electrical resistivity curve of Portland cements with superplasticizer

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Abstract

Electrical measurement was employed to investigate the early hydration characteristics of cement pastes with different dosages of superplasticizer in the same W/C ratio. The hyperbolic method was applied to analyze the electrical resistivity development. The peak point (P h) on the hyperbolic curve could be easily read. The time (t h) to reach the point Ph had strong relations with the setting time. th was delayed with the increment of the dosage of superplasticizer. The time th was used to plot the relationship between the initial setting time and fi nal setting time. The hyperbolic equation was established to predict the ultimate resistivity. The retardation effect of the superplasticizer was confirmed in the same W/C ratio by setting time and isothermal heat evolution.

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Funded by the National Natural Science Foundation of China (No.50778078)

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Wei, X., Xiao, L. & Li, Z. Hyperbolic method to analyze the electrical resistivity curve of Portland cements with superplasticizer. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 23, 245–248 (2008). https://doi.org/10.1007/PL00022219

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  • DOI: https://doi.org/10.1007/PL00022219

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