Ability of Hardened Paste of Cementitious Calcium–Aluminophosphate Mineral to Bind with Chloride Ions
Publication: Journal of Materials in Civil Engineering
Volume 34, Issue 5
Abstract
Phosphoaluminate cement (PAC) is a green cementing material with wide application prospects. Its main mineral compositions are calcium aluminate (CA), tricalcium phosphate , and calcium aluminophosphate (CAP). In this study, calcium aluminophosphate mineral was prepared in the laboratory, and its binding with chloride ions was investigated as a separate binder. The microstructure and the hydration and hardening process of the CAP paste were observed by X-ray computed tomography (XCT) and scanning electron microscopy (SEM), and the phase analysis of the hydration products before and after being soaked in sodium chloride solution was conducted using X-ray diffraction. The mechanism for the binding of the hardened CAP paste with chloride ions was also studied. The results show that the Freundlich isotherm well models the adsorption of chloride ions onto the hydration products. The binding of chloride ions with the CAP is chiefly attributed to the chemical bonding of the hydrated calcium aluminate with the ions, which is different from that with portland cement, largely caused by the physical adsorption of them onto the C─ S─ H gel.
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Data Availability Statement
The data used to support the findings of this study are available from the corresponding author upon request.
Acknowledgments
All the chemicals used were of analytical grade and were supplied by Xilong Chemical Co., Ltd., Chengdu, China. The deionized water was purchased from Duao Technology Co., Ltd., Shenzhen, China. The lifting smart water bath was produced by Yingyu High-tech Instrument Factory, Henan, China. The type of mechanical mixer was RW20 digital display, produced by IKA Group Laboratory Series Company, Germany. The BPG-65B high-temperature blast oven was supplied by Tongli Xinda Instrument Factory, Tianjin, China. The electric resistance furnace heated by silicon molybdenum rods was produced by Yifeng Electric Furnace Co., Ltd., Shanghai, China. The KC-1000 high-speed crusher was purchased from Kai Chuang Tong He Technology Development Co., Ltd., Beijing, China. The authors are grateful for the financial support of the National Natural Science Foundation of China (Grant No. 51472163). We also thank Papergoing (www.papergoing.com) for its linguistic assistance during the preparation of this manuscript.
References
Cao, Q., K. F. Tan, and W. Yuan. 2009. “Study on the chloride ion curing ability of cement-based materials.” [In Chinese.] J. Wuhan Univ. Technol. 31 (6): 24–27.
Cao, Y., L. Guo, W. Zang, J. Zhang, and X. Xue. 2018. “Summary of the destruction mechanism of cement-based materials under the interaction of chloride and sulfate.” [In Chinese.] Mater. Rep. 32 (23): 4142–4149.
Ekolu, S. O., M. D. A. Thomas, and R. D. Hootan. 2006. “Pessimum effect of externally applied chlorides on expansion due to delayed ettringite formation: Proposed mechanism.” Cem. Concr. Res. 36 (4): 688–696. https://doi.org/10.1016/j.cemconres.2005.11.020.
Florea, M. V. A., and H. J. H. Brouwers. 2012. “Chloride binding related to hydration products: Part I: Ordinary portland cement.” Cem. Concr. Res. 42 (2): 282–290. https://doi.org/10.1016/j.cemconres.2011.09.016.
Glass, G. K., and N. R. Buenfeld. 2000. “The influence of chloride binding on the chloride induced corrosion risk in reinforced concrete.” Corros. Sci. 42 (2): 329–344. https://doi.org/10.1016/S0010-938X(99)00083-9.
Glasser, F. P., and L. Zhang. 2001. “High-performance cement matrices based on calcium sulfoaluminate–belite compositions.” Cem. Concr. Res. 31 (12): 1881–1886. https://doi.org/10.1016/S0008-8846(01)00649-4.
Gou, M. F., and X. M. Guan. 2010. “Research status and prospects of the solidified chloride ion of cement base material.” [In Chinese.] Mater. Rep. 24 (11): 124–127.
Gou, M. F., X. M. Guan, and Q. Sun. 2015. “Adsorption of chloride ion by calcium silicate hydrate.” [In Chinese.] J. Build. Mater. 18 (3): 363–368.
Hirao, H., K. Yamada, H. Takahashi, and H. Zibara. 2005. “Chloride binding of cement estimated by binding isotherms of hydrates.” J. Adv. Concr. Technol. 3 (1): 77–84. https://doi.org/10.3151/jact.3.77.
Juenger, M. C. G., F. Winnefeld, J. L. Provis, and J. H. Ideker. 2011. “Advances in alternative cementitious binders.” Cem. Concr. Res. 41 (12): 1232–1243. https://doi.org/10.1016/j.cemconres.2010.11.012.
Li, S., J. Hu, Q. Wang, B. Liu, and T. Zhou. 2001. “Preliminary study on high temperature resistance of phosphoaluminate cement.” [In Chinese.] Bull. Chin. Ceram. Soc. 20 (4): 45–48.
Li, S. Q., G. H. Zhang, and N. Zhang. 1998. “Study on hydraulic activity of CaO- ternary system in aluminum: Rich area.” [In Chinese.] J. Chin. Ceram. Soc. 26 (2): 142–1149.
Liu, P., Z. W. Yu, and M. Zhang. 2011. “Study on the early hydration process of phosphoaluminate cement.” [In Chinese.] J. Central South Univ. (Sci. Technol.) 42 (11): 3530–3535.
Ma, H. Q., C. Yi, and H. G. Zhu. 2018. “A review of the influence of auxiliary cementitious materials on the binding of chloride ions in hardened cement paste.” Supplement, Mater. Rep. 32 (S1): 469–474.
Ma, K., X. Youjun, L. Can, and X. Hui. 2004. “Research on influencing factors of chloride ion in concrete curing.” [In Chinese.] Concrete 2004 (6): 20–21.
Midgley, H. G., and J. M. Illston. 1984. “The penetration of chlorides into hardened cement pastes.” Cem. Concr. Res. 14 (4): 546. https://doi.org/10.1016/0008-8846(84)90132-7.
Ministry of Transport of the People’s Republic of China. 1998. Testing code of concrete for port and waterwog engineering. JTJ 270-98. Beijing: China Communications Press.
Pomakhina, E., D. Deneele, A. C. Gaillot, M. Paris, and G. Ouvrard. 2012. “29Si solid state NMR investigation of Pozzolanic reaction occurring in lime-treated Ca-bentonite.” Cem. Concr. Res. 42 (4): 626–632. https://doi.org/10.1016/j.cemconres.2012.01.008.
Scrivener, K. L., and A. Capmas. 1998. “Calcium aluminate cements.” In Lea’s chemistry of cement and concrete, edited by P. C. Hewlett, 713–782. Oxford, UK: Elsevier.
Su, M., W. Kurdowski, and F. Sorrentino. 1992. “Development in non-Portland cements.” In Vol. 1 of Proc., 9th Int. Congress on the Chemistry of Cements, 317–354. New Delhi, India: National Council for Cement and Building Materials.
Tang, L., and L. O. Nilsson. 1993. “Chloride binding capacity and binding isotherms of OPC pastes and mortars.” Cem. Concr. Res. 23 (2): 247–253. https://doi.org/10.1016/0008-8846(93)90089-R.
Trejo, D., M. Shakouri, N. P. Vaddey, and O. B. Isgor. 2018. “Development of empirical models for chloride binding in cementitious systems containing admixed chlorides.” Constr. Build. Mater. 189 (Nov): 157–169. https://doi.org/10.1016/j.conbuildmat.2018.08.197.
Wang, L. B., S. L. Zhan, and X. D. Tang. 2020a. “Research on corrosion behavior of steel bar in sulphoaluminate cement mortar.” [In Chinese.] Bull. Chin. Ceram. Soc. 39 (2): 337–343.
Wang, W., C. H. Yi, and S. Q. Li. 2008. “Sulfate corrosion resistance of new phosphoaluminate cement.” [In Chinese.] J. Chin. Ceram. Soc. 36 (1): 82–87.
Wang, Y., Z. Shui, X. Gao, Y. Huang, R. Yu, and Q. Song. 2020b. “Chloride binding capacity and phase modification of alumina compound blended cement paste under chloride attack.” Cem. Concr. Compos. 108 (Apr): 103537. https://doi.org/10.1016/j.cemconcomp.2020.103537.
Wang, Y., and M. Su. 1994. “The third cement series in China.” [In Chinese.] World Cem. 25 (8): 6–10.
Xiao, J., and M. L. Guo. 2016. “Effect of compound salt erosion on chloride ion in Portland cement solidification.” [In Chinese.] Funct. Mater. 47 (12): 12019–12024.
Xiao, J., M. L. Guo, and D. F. Wang. 2016. “Study on the chloride ion curing performance of Portland cement under different cation conditions.” [In Chinese.] Bull. Chin. Ceram. Soc. 35 (9): 2956–2961.
Xing, F., et al. 2014. A ternary inorganic compound. Shenzhen, China: Shenzhen Univ.
Zang, W. J., L. P. Guo, and Y. Z. Cao. 2019. “Interaction of internal chloride ion and sulfate ion in cement paste.” [In Chinese.] Mater. Rep. 33 (8): 1317–1321.
Zhang, J., C. Shi, and Z. Zhang. 2019. “Chloride binding of alkali-activated slag/fly ash cements.” Constr. Build. Mater. 226 (Nov): 21–31. https://doi.org/10.1016/j.conbuildmat.2019.07.281.
Zibara, H., R. D. Hooton, M. D. A. Thomas, and K. Stanish. 2008. “Influence of the C/S and C/A ratios of hydration products on the chloride ion binding capacity of lime-SF and lime-MK mixtures.” Cem. Concr. Res. 38 (3): 422–426. https://doi.org/10.1016/j.cemconres.2007.08.024.
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Published In
Journal of Materials in Civil Engineering
Volume 34 • Issue 5 • May 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Nov 24, 2020
Accepted: Sep 14, 2021
Published online: Feb 22, 2022
Published in print: May 1, 2022
Discussion open until: Jul 22, 2022
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