American Journal of Civil Engineering and Architecture
ISSN (Print): 2328-398X ISSN (Online): 2328-3998 Website: http://www.sciepub.com/journal/ajcea Editor-in-chief: Mohammad Arif Kamal
Open Access
Journal Browser
Go
American Journal of Civil Engineering and Architecture. 2016, 4(5), 153-158
DOI: 10.12691/ajcea-4-5-1
Open AccessArticle

The Early Hydration Characteristics of Portland Cements with Superplasticizer Using Electrical Measurements

WANG Shengnian1, WEI Xiaosheng2, and FAN Zhihong1

1CCCC Fourth Harbor Engineering institute Co., Ltd., Guangzhou, 510230, China

2School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China

Pub. Date: August 06, 2016

Cite this paper:
WANG Shengnian, WEI Xiaosheng and FAN Zhihong. The Early Hydration Characteristics of Portland Cements with Superplasticizer Using Electrical Measurements. American Journal of Civil Engineering and Architecture. 2016; 4(5):153-158. doi: 10.12691/ajcea-4-5-1

Abstract

In this paper, an electrical measurement was applied to investigate the early hydration characteristics of cement paste with different dosages of superplasticizer. The bulk electrical resistivity development curves and the derivative curves were studied. It is found that there are two main peaks and four critical points on the derivative curves. The critical points are used to divide the hydration process into dissolution, setting, acceleration, deceleration and diffusion-controlled periods. The physical meanings of the critical points are identified by the penetration measurement of Vicat device and the heat evolution test. The setting occurred in the second period which provides an alternative method to determine the setting time by the electrical measurement. The results of the bulk electrical resistivity have a positive relation with that of the compression strength. The retardation effect of the superplasticizer is demonstrated by the delayed time for the critical points occurrence and confirmed by the setting time. A rapid method for selecting a suitable dosage of the chemical admixture for construction requirements is proposed.

Keywords:
electrical resistivity setting time superplasticizer hydration

Creative CommonsThis work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

Figures

Figure of 6

References:

[1]  H. H. M. Darweesh “Hydration, Strength Development and Sulphate Attack of Some Cement Composites”, World Applied Science, 23, 2, 2013, 137-144.
 
[2]  H. H. M. Darweesh “Biopolymers and Biotech Admixtures for Eco Efficient Construction Materials”, Chapter 6, “Black liquor waste as a cement admixtures or cement and concrete admixtures”, 2016, 99-130.
 
[3]  Li Z., Li W. Contactless, transformer-based measurement of the resistivity of materials [P]. United States Patent 6639401, 2003.
 
[4]  Dotelli G, Mari C.M. “The evolution of cement paste hydration process by impedance spectroscopy.” Materials Science and Engineering A, 2003, 303(1-2), 54-59.
 
[5]  Whittington H.W., McCarter W.J., and Forde M.C. “The conduction of electricity through concrete.” Magazine of Concrete and Research, 1981, 33(114), 48-60.
 
[6]  Shane J.D., Mason T.O., Jennings H.M., Garboczi E.J. and Denz D.P. “Effect of the interfacial transition zone on the conductivity of Portland cement mortars.” J. Am. Ceram. Soc. 2000, 83, 1137-1144.
 
[7]  Paya J. et al. “Enhanced conductivity measurement techniques for evaluation of fly ash pozzolantic activity.” Cem. Concre. Res. 2001, 31(1),41-49.
 
[8]  Torrents J.M., Roncero J. and Gettu R. “Utilization of impedance spectroscopy for studying the retarding effect of a superplasticizer on the setting of cement.” Cem. Concr. Res. 1998, 28 (9), 1325-1333.
 
[9]  Li Z. Wei X. and Li W. “Preliminary Interpretation of Portland Cement Hydration Process Using Resistivity Measurements.” ACI material journal, 2003, 100 (3): 253-257.
 
[10]  Xie P., Fu,Y. Gu P. and Beaudoin J.J. “A simple method for determination of aggregate content in hardened concrete.” Journal of material science of letter, 2001, 13, 115-116.
 
[11]  Princigallo A., van Breugel K. and Levita G. “Influence of the aggregate on the electrical conductivity of Portland cement concretes.” Cement and Concrete Research, 2003, 33(11), 1755-1763.
 
[12]  McCarter W. J., Starrs G. and Chrisp T. M. “Electrical conductivity, diffusion, and permeability of Portland cement-based mortars.” Cement and Concrete Research, 2000, 30(9), 1395-1400.
 
[13]  Coverdale R.T. et al. “Interpretation of impedance spectroscopy of cement paste via computer modeling. Part 1. Bulk conductivity and offset resistance.” Journal of Material Science, 1995, 30(3), 712-719.
 
[14]  Agulló L., Toralles-Carbonari B., Gettu R. and Aguado A. “Fluidity of Cement Pastes with Mineral Admixtures and Superplasticizer – A study based on the Marsh cone test.” Materials and Structures, 1999, 32, 479-485.
 
[15]  Xiao Lianzhen and Li Zongjin Li. New understanding of cement hydration mechanism through electrical resistivity measurement and microstructure investigation[J]. Journal of materials in civil engineering. 2009,21 (8):368-373.
 
[16]  Gartner E.M., Young J.F., Damidot D.A., Jawed I. “Hydration of Portland cement,” in: Bensted, J.,Barnes, P.(eds), Structure and performance of cements, Spon Press, London , 83-84, 2002.
 
[17]  Tamas F.D., Farkas E., Voros M., Roy D.M. “Low-frequency electrical conductivity of cement, clinker and clinker mineral pastes.” Cem. Concr. Res. 1987, 17(2), 340.
 
[18]  Banfill P.F.G., Saunders D.C. “The relationship between the sorption of organic compounds on cement and the retardation of hydration.” Cem. Concr. Res. 1986, 16 (3), 399-410.
 
[19]  Andersen P.J., Roy D.M., and Gaidis J.M. “The effect of superplasticizer molecular weight on its adsorption on, and dispersion of, cement.” Cem. Concr. Res. 1996, 18(6), 980-986.
 
[20]  Moukwa M., Brodwin M., Christo S., Chang J., Shah S.P. “The influence of the hydration process upon microwave properties of cements.” Cem. Concr. Res. 1991, 21, 863-872.
 
[21]  Ramachandran V.S. In: “Concrete Admixtures Handbook, Properties, Science, and Technology.” Noyes Publications, Park Ridge, NJ, USA, 528-532, 1984.