The impact of sulphate and magnesium on chloride binding in Portland cement paste

作者: K. De Weerdt , D. Orsáková , M.R. Geiker

DOI: 10.1016/J.CEMCONRES.2014.07.007

关键词:

摘要: The effect of magnesium and sulphate present in sea water on chloride binding in Portland cement paste was investigated. Ground well hydrated cement paste was exposed to MgCl {sub 2}, NaCl, NaCl+ MgCl {sub 2}, MgSO {sub 4}+ MgCl {sub 2} and artificial sea water solutions with a range of concentrations at 20° C. Chloride binding isotherms are determined and pH of the solutions were measured. A selection of samples was examined by SEM-EDS to identify phase changes upon exposure. The experimental data were …

参考文章(23)
Adel Mesbah, Jean‐Philippe Rapin, Michel François, Céline Cau‐dit‐Coumes, Fabien Frizon, Fabrice Leroux, Guillaume Renaudin, None, Crystal Structures and Phase Transition of Cementitious Bi-Anionic AFm-(Cl−, CO32−) Compounds Journal of the American Ceramic Society. ,vol. 94, pp. 261- 268 ,(2011) , 10.1111/J.1551-2916.2010.04050.X
Qiang Yuan, Caijun Shi, Geert De Schutter, Katrien Audenaert, Dehua Deng, Chloride binding of cement-based materials subjected to external chloride environment – A review Construction and Building Materials. ,vol. 23, pp. 1- 13 ,(2009) , 10.1016/J.CONBUILDMAT.2008.02.004
P.W Brown, Steven Badger, The distributions of bound sulfates and chlorides in concrete subjected to mixed NaCl, MgSO4, Na2SO4 attack Cement and Concrete Research. ,vol. 30, pp. 1535- 1542 ,(2000) , 10.1016/S0008-8846(00)00386-0
M. Ben-Yair, The effect of chlorides on concrete in hot and arid regions Cement and Concrete Research. ,vol. 4, pp. 405- 416 ,(1974) , 10.1016/0008-8846(74)90106-9
S. Ehtesham Hussain, Rasheeduzzafar, Ahmed S. Al-Gahtani, Influence of sulfates on chloride binding in cements Cement and Concrete Research. ,vol. 24, pp. 8- 24 ,(1994) , 10.1016/0008-8846(94)90078-7
C. Arya, N.R. Buenfeld, J.B. Newman, Factors influencing chloride-binding in concrete Cement and Concrete Research. ,vol. 20, pp. 291- 300 ,(1990) , 10.1016/0008-8846(90)90083-A
W. Hummel, U. Berner, E. Curti, F. J. Pearson, T. Thoenen, Nagra/PSI Chemical Thermodynamic Data Base 01/01 Radiochimica Acta. ,vol. 90, pp. 805- 813 ,(2002) , 10.1524/RACT.2002.90.9-11_2002.805
Thomas Matschei, Barbara Lothenbach, Fredrik P. Glasser, Thermodynamic properties of Portland cement hydrates in the system CaO–Al2O3–SiO2–CaSO4–CaCO3–H2O Cement and Concrete Research. ,vol. 37, pp. 1379- 1410 ,(2007) , 10.1016/J.CEMCONRES.2007.06.002
Magdalena Balonis, Barbara Lothenbach, Gwenn Le Saout, Fredrik P. Glasser, Impact of chloride on the mineralogy of hydrated portland cement systems Cement and Concrete Research. ,vol. 40, pp. 1009- 1022 ,(2010) , 10.1016/J.CEMCONRES.2010.03.002