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.
Similar content being viewed by others
References
Li Z, Li W. Contactless, Transformer-based Measurement of the Resistivity of Materials[P]. United States Patent 6639401, 2003
Dotelli G, Mari C M. The Evolution of Cement Paste Hydration Process by Impedance Spectroscopy[J]. Materials Science and Engineering A, 2001, 303(1–2):54–59
Whittington H W, McCarter W J, Forde M C. The Conduction of Electricity Through Concrete[J]. Magazine of Concrete and Research, 1981, 33(114): 48–60
Shane J D, Mason T O, Jennings H M, et al. Effect of the Interfacial Transition Zone on the Conductivity of Portland Cement Mortars[J]. J. Am. Ceram. Soc., 2000, 83:1137–1144
Paya J, et al. Enhanced Conductivity Measurement Techniques for Evaluation of Fly Ash Pozzolantic Activity[J], Cem. Concre. Res., 2001, 31(1):41–49
Torrents J M, Roncero J, Gettu R. Utilization of Impedance Spectroscopy for Studying the Retarding Effect of a Superplasticizer on the Setting of Cement[J]. Cem. Concr.Res., 1998, 28 (9): 1325–1333
Li Z, Wei X. The Electrical Resistivity of Cement Paste Incorporated with Retarder[J]. Journal of Wuhan University of Technology, Materials Science Edition, 2003, 18(3):76–78
Xie P, Fu Y, Gu P, et al. A Simple Method for Determination of Aggregate Content in Hardened Concrete[J]. Journal of material science of letter, 1994, 13:115–116
Princigallo A, Van Breugel K, Levita G. Influence of the Aggregate on the Electrical Conductivity of Portland Cement Concretes[J], Cement and Concrete Research, 2003,33(11): 1 755–1 763
Tumidajski P J. Relationship between Resistivity, Diffusivity and Microstructural Descriptors for Mortars with Silica Fume [J], Cement and Concrete Research, 2005,35(7):1 262–1 268
McCarter W J, Starrs G, Chrisp T M. Electrical Conductivity, Diffusion, and Permeability of Portland Cement-based Mortars[J]. Cement and Concrete Research,2000, 30(9):1 395–1 400
Coverdale R T, et al. Interpretation of Impedance Spectroscopy of Cement Paste via Computer Modeling. Part 1. Bulk Conductivity and Offset Resistance[J]. Journal of Material science, 1995, 30(3): 712–719
McCarter W J, Chrisp T M, Starrs G. Characterization and Monitoring of Cement-based Systems Using Intrinsic Electrical Property Measurements[J]. Cem. Concr. Res. 2003, 33:197–206
Van Breugel K. Numerical Simulation of Hydration and Microstructural Development in Hardening Cement-based Materials[J]. Cem. Concr. Res. 1995,25 (2):319–331
Wei X, Li Z. Early Hydration Process of Portland Cement Paste by Electrical Measurement[J]. Journal of Materials in Civil Engineering. 2006,18(1)99–105
Li Z, Wei X, Li W. Preliminary Interpretation of Portland Cement Hydration Process Using Resistivity Measurements[J]. ACI material journal, 2003, 100(3): 253–257
Agulló L, Toralles-Carbonari B, Gettu R, et al. Fluidity of Cement Pastes with Mineral Admixtures and Superplasticizer-A Study Based on the Marsh Cone Test[J]. Materials and Structures, 1999, 32: 479–485
ASTM, Standard Test Method for Flow of Grout for Preplaced-aggregate Concrete (Flow Cone Method), C939-87, Annual Book of ASTM Standards, American Society for Testing and Materials.1987
Author information
Authors and Affiliations
Additional information
Funded by the National Natural Science Foundation of China (No.50778078)
Rights and permissions
About this article
Cite this article
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
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/PL00022219