Influence of the Cement Fineness on Strengths of Cement Pastes Containing High Phosphorus Slag
Publication: Journal of Materials in Civil Engineering
Volume 27, Issue 12
Abstract
Mechanical grinding was used to increase the specific surface area of cement in order to increase the dosage of phosphorus slag (PS) in Type cement. X-ray diffraction, hydration heat, and scanning electron microscopy were used to analyze the hydration process of cement containing PS. The results show that the increase of fineness of cement can obviously improve the mechanical property of PS cement pastes. When specific surface area increased to , the flexural strength and compressive strength of cement mortars mixed with 40% PS for 3 and 28 days are 3.77, 17.6, 9.89, and 52.0 MPa, respectively, still meeting the strength requirements of Type cement. The PS admixture can effectively lower the hydration heat of cement. Phosphorus slag delayed the hydration process of cement, inhibited the formation of ettringite and contributed a low strength of mortars for 3 days curing. The degree of hydration of PS at the early ages was low, leading to a poor interface between PS particle and cement matrix.
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Acknowledgments
The research reported in this paper was financially supported by the project of Panzhihua Municipal Science and Technology (No. 2012CY-S-19), Anhui Provincial Science and Technology Foundation (No. 1301042127) and the Open Foundation from the State Key Laboratory of Materials-Oriented Chemical Engineering (No. KL13-14).
References
Ali, A., and Mostafa, M. (2013). “Mechanical activation of chemically activated high phosphorous slag content cement.” Powder Technol., 245(8), 182–188.
Chen, X., Fang, K. H., and Yang, H. Q., and Peng, H. (2011). “Hydration kinetics of phosphorous slag-cement paste.” J. Wuhan Univ. Technol. Mater. Sci. Ed., 26(1), 142–146.
Chen, X., Zeng, L., and Fang, K. H. (2009). “Anti-crack performance of phosphorous slag concrete.” J. Wuhan Univ. Technol. Mater. Sci. Ed., 14(1), 80–86.
Gao, P. W., et al. (2008). “Microstructure and pore structure of concrete mixed with superfine phosphorous slag and super plasticizer.” Cement Concrete Res., 22(5), 837–840.
GB 175-2007. (2007). “Common portland cement.” Standardization Administration of China, Beijing.
GB 17671-1999. (1999). “Method of testing cement-determination.” Standardization Administration of China, Beijing.
GB/T 1346-2011. (2011). “Teat method for water requirement of normal consistency, setting time and soundness of portland cement.” Standardization Administration of China, Beijing.
Guo, C. Z., Zhu, J. Q., Zhou, W. B., Sun, Z., and Chen, W. (2012). “Effect of phosphorous and fluorine on hydration process of tricalcium silicate and tricalcium aluminate.” J. Wuhan Univ. Technol. Mater. Sci. Ed., 27(2), 333–336.
Guo, X., and Shi, H. (2012). “Utilization of steel slag powder as a combined admixture with ground granulated blast-furnace slag in cement based materials.” J. Mater. Civ. Eng., 1990–1993.
Li, D. X., Shen, J. L., Chen, L., and Wu, X. Q. (2001). “The influence of fast-setting/early-strength agent on high phosphorous slag content cement.” Cement Concrete Res., 31(7), 19–24.
Li, D. X., Shen, J. L., Mao, L. X., and Wu, X. Q. (2000). “The influence of admixtures on the properties of phosphorous slag cement.” Cement Concrete Res., 30(7), 1169–1173.
Liu, L. B., and Yan, Y. (2009). “Study on harding and mechanical properties of moderate heat portland cement with large content of phosphorous slag.” J. Southwest Univ. Sci. Technol., 24(3), 42–44 (in Chinese).
Qian, G. P., Bai, S., Ju, S. J., and Huang, T. (2012). “Laboratory evaluation on recycling waste phosphorus slag as the mineral filler in hot-mix asphalt.” J. Mater. Civ. Eng., 846–850.
Sharma, R. L., and Pandey, S. P. (1999). “Influence of mineral additives on the hydration characteristics of ordinary portland cement.” Cement Concrete Res., 29(9), 1525–1529.
Shi, C. J. (2000). “High performance cementing materials from industrial slags—A review.” Resour. Conserv. Recycl., 29(3), 195–207.
Shi, C. J., and Li, Y. Y. (1989). “Investigation on some factors affecting the characteristics of alkali-phosphorus slag cement.” Cement Concrete Res., 19(4), 527–533.
Shu, X., Huang, B., and Liu, J. (2013). “Special issue on materials innovations for sustainable infrastructure.” J. Mater. Civ. Eng., 825–828.
Tang, J. H., Deng, M., Wang, A. G., and Xie, L. L. (2014). “Dissolution characteristics of phosphorous slag in water and simulative pore solutions of cement pastes.” Bull. Chin. Ceram. Soc., 33(9), 1–6 (in Chinese).
Taylor, H. F. W. (1997). Cement chemistry, 2nd Ed., Thomas Telford, London.
Xu, X., Zhao, Y., and Li, S. X. (2012). “Influence of different localities phosphorus slag powder on the performance of portland cement.” Procedia Eng., 27, 1399–1404.
Zhao, F. Q., Ni, W., and Liu, H. J. (2007). “Activated fly ash/slag blended cement.” Resour. Conserv. Recycl., 52(2), 303–313.
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Published In
Journal of Materials in Civil Engineering
Volume 27 • Issue 12 • December 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jul 28, 2014
Accepted: Feb 19, 2015
Published online: Apr 16, 2015
Discussion open until: Sep 16, 2015
Published in print: Dec 1, 2015
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