Abstract
Setting time and strength of sulphoaluminate rapid hardening cement (SAC) incorporated in the presence and absence of silica fume (SF) were determined. Combined with the techniques of isothermal calorimeter, XRD and FSEM, the hydration kinetics of the two systems and the effect mechanism of SF on SAC were investigated. The experimental results showed that SF was proved to be beneficial for SAC system, in terms of setting time and late strength gain. Evidence of accelerator effect of silica fume was found during the first 8 hours of hydration. The formation of AFt was accelerated and the microstructure of the hydration products grew denser with incorporation of SF. SF was proved to play the role of dispersion and setting control at early age and had a greater contribution to later strength due to the increment of crystal nucleation point and the pozzolanic activity. Therefore, SF can be used to not only control the hydration kinetics of SAC, but also develop the late strength and improve the microstructure.
Similar content being viewed by others
References
Li Dedong. Infrared Spectroscopic Study of Sulphoaluminate Cement [J]. Journal of the Chinese Ceramic Society, 1984, 12(1):119–125 (in Chinese)
Han Jianguo, Yan Peiyu. Influence of Water to Cement Ratio and Lithium Carbonate on Sulphoaluminate Cement Hydration Process [J]. Concrete, 2010(12):5–7, 26 (in Chinese)
Han Jianguo, Yan Peiyu. Influence of Lithium Compound on Sulphoaluminate Cement Hydration Process [J]. Journal of the Chinese Ceramic Society, 2010, 38(4):608–614 (in Chinese)
Zhou Huaxin, Wan Yun, Hong Jinxiang. Experimental Research on Rubber Plinth Gravitational Grouting Mortar of High Speed Railways [J]. Concrete, 2010(1):109–111 (in Chinese)
EI-Hadj Kadri, Roger Duval. Hydration Heat Kinetics of Concrete with Silica Fume[J]. Construction and Building Materials, 2009(23): 3 388–3 392
Thapar University, Patiala. Utiliazation of Silica Fume in Concrete: Review of Hardened Properties[J]. Resources, Conservation and Recycling, 2011 (55): 923–932
Yuan Runzhang. Cementitious Material Science [M]. The Second Edition. Wuhan: Wuhan University of Technology Press, 1996:93–95&195–197 (in Chinese)
Knudson T. Particale size Distribution in Cement Hydration [C]. In: The 7th International Congress on Chemistry of Cement, Paris, 1980
Swaddiwudhipong S, Chen D, Zhang MH. Simulation of the Exothermic Hydration process of Portland Cement[J]. Advanced Cement Research, 2002, 14(2):61–69
Schindler AK, Folliard KJ. Heat of Hydration Models for Cementitious Materials[J]. ACI Mater Journal, 2005, 102(1): 24–33
Peng Jiahui, Lou Zonghan. Study on the Mechanism of Ettringite Formation[J]. Journal of the Chinese Ceramic Society, 2000, 28(6):511–515 (in Chinese)
El-Hadi ZA and Tantawi NS. Influence of Silica Fume on Corrosion Behavior of Reinforced Steel in Different Media [J]. Journal of Wuhan University of Technology-Mater. Sci. Ed., 2002, 18(1):83–88
Chen Juan. Research of Properties Modification and Applications of Sulphoaluminate Cement [M]. Wuhan: Wuhan University, 2005 (in Chinese)
Zhou Shihua. Effect of Ultra-fine Powder (CaCO 3 and SiO 2) on Performance of Sulphoaluminate Cement[M]. Chongqing: Chongqing University, 2005 (in Chinese)
J Yajun, Cahyadi JH. Effects of Densified Silica Fume on Microstructure and Compressive Strength of Blended Cement Pastes [J]. Cement and Concrete Research, 2003 (10): 1 543–1 548
Author information
Authors and Affiliations
Corresponding author
Additional information
Funded by the National Natural Science Foundation of China (Nos. 51379163 and 51372184), and the National Key Research Program (973 Program) (No. 2013CB035901)
Rights and permissions
About this article
Cite this article
He, Z., Yang, H., Hu, S. et al. Hydration mechanism of silica fume-sulphoaluminate cement. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 28, 1128–1133 (2013). https://doi.org/10.1007/s11595-013-0832-0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11595-013-0832-0