Abstract
The influence of impurities such as SiO2 and F2O3 on the hydration behavior of calcium aluminate cement (CAC) was studied in this work. The hydration of the cement was characterized by the exothermic profile of cement pastes, and the dissolution-precipitation rate of the cement aqueous suspension was evaluated by electrical conductivity measurement. In order to analyze the resulting hydration products, the cement hydration was terminated via the freeze-vacuum drying method at the designated times. Then the phase development and microstructure evolution during cement hydration were investigated by XRD and SEM, respectively. The results indicate that the hydration rate is faster when the cement contains a higher amount of impurities. It is proposed that the higher hydration rate of the cement is probably related to the lattice imperfection of the main calcium aluminates in CAC.
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Parr, C., Fryda, H., Liyama, M., Borovsky, A., Jean-Pierre, L.: Interactions of calcium aluminate cements and other matrix components which control the hardening of deflocculated castables. Taikabutsu Overseas 31 (2011) 19–26
You, K.-S., Ahn, J.-W., Lee, K.-H., Goto, S.: Effects of crystallinity and silica content on the hydration kinetics of 12CaO·7Al2O3. Cement Concrete Comp. 28 (2006) 119–123
Chakraborty, I.N., Basu, C., Majumdar, U.: Effect of pyro-processing parameters and raw material base on calcium aluminate cement properties. Proc. First Iranian Refractory Symposium, Tehran, Iran (2004) 525–532
Sengupta, S., Roy, T.K., Ramasubramanian, N.: Control of alumina cement phase by process parameters. Proc. Unified International Technical Conf. on Refract. (UNITECR 2013) Victoria, British Columbia (2014) 909–914
Majumdar, S., Sarkar, R., Vajifdar, P., Narayanan, S., Cursetji, R., Chatterjee, A.: User friendly high refractory calcium aluminate cement. Proc. Inter. Conf. on CAC, Edinburgh, UK (2001) 467–476
Gnyra, B.: Coarsening of partially calcined alumina dust. U.S. Patent, Alcan Research and Development Ltd. (1977)
Tchamba, A., Sofack, J., Yongue, R., Melo, U.: Formulation of calcium dialuminate (CaO·2Al2O3) refractory cement from local bauxite. J. As. Ceram. Soc. 3 (2015) 164–172
Tchamba, A.B., Melo, U.C., Lecomte-Nana, G.L., Kamseu, E., Gault, C., Yongue, R., Njopwouo, D.: Use of bauxite from Cameroon for solid state sintering and characterization of calcium dialuminate (CaO·2Al2O3) refractory cement. Ceram. Int. 40 (2014) 1961–1970
Parr, C., Wohrmeyer, C., Valdelievre, B., Namba, A.: Effect of formulation parameters upon the strength development of calcium aluminate cement containing castables. Refractories (Tokyo) 56 (2004) 238–247
Alt, C., Wong, L., Parr, C.: Measuring castable rheology by exothermic profile. Refract. Appl. News. 8 (2003) 15–18
Parr, C., Simonin, F., Touzo, B., Wohrmeyer, C., Valdelièvre, B., Namba, A.: The impact of calcium aluminate cement hydration upon the properties of refractory castables. J. Technical Assoc. Refract. Japan 25 (2005) 78–88
Lee, W.E., Vieira, W., Zhang, S.: Castable refractory concretes. Int. Mater. Rev. 46 (2001) 145–167
Zhu, Y.Z., Gu, D., Hei, E.C.: Modern fundamental chemistry (In Chinese), 1st ed. Chemical Industry Press (1998)
Kahlenberg, V.: On the Al/Fe substitution in iron doped monocalcium aluminate: The crystal structure of CaAl1.8Fe0.2O4. Eur. J. Mineral. 13 (2001) 403–410
Pöllmann, H.: Mineralogy and crystal chemistry of calcium aluminate cement. Proc. Inter. Conf. on CAC, Edinburgh, UK (2001) 79–119
Parr, C.: Calcium aluminate cement — what happens when things go wrong? Technical Paper IRE Annual Conf., Rotherham, UK 33 (2008) 1–11
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Shang, X., Ye, G., Zhai, P. et al. Hydration Behavior of Calcium Alumina Cements with Different Amounts of Impurities. Interceram. - Int. Ceram. Rev. 65, 250–254 (2016). https://doi.org/10.1007/BF03401177
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DOI: https://doi.org/10.1007/BF03401177