Effect of Sodium Orthophosphate on Rheology and Hydration of MgO/Nesquehonite Cement
Source abstract
Abstract
Magnesium oxide-magnesium carbonate cements are promising alternatives to Portland cement due to their ability to sequester CO2. This study investigates the effect of sodium orthophosphate on workability, hydration kinetics and hydrate assemblage in MgO/nesquehonite binder to assess its possible use as an admixture. Sodium orthophosphate decreases the yield stress of pure MgO pastes. In case of MgO/nesquehonite blends, the yield stress is much lower than for the pure MgO system and is not significantly further decreased by sodium orthophosphate. Isothermal calorimetry results indicate a delay in the hydration of MgO pastes, increasing with the sodium orthophosphate content, while for MgO/nesquehonite blends, only a moderate retardation is observed. Mortars containing up to 1 mass-% of sodium orthophosphate show similar flexural and compressive strength values as mortars without sodium orthophosphate. Phosphate species sorb onto the surface of MgO resulting in a strongly negative surface charge and retarding the reaction of MgO to brucite. During hydration, magnesium phosphate phases precipitate and phosphate is incorporated into brucite-like phases. Thus, despite a mixed effect of sodium orthophosphate on MgO/nesquehonite cement, it is an encouraging additive to control the kinetics and workability times of MgO-only systems.
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Research context
OpenAlex topics: Magnesium Oxide Properties and Applications · Concrete and Cement Materials Research · Innovations in Concrete and Construction Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Laboratory for Concrete & Asphalt, Swiss Federal Laboratories for Materials Science and Technology (Empa), 8600 Dübendorf, Switzerland.
University of Bern, Institute of Geological Sciences, Mineralogy Group, 3012 Bern, Switzerland.
Group Cement Chemistry and Thermodynamics, Laboratory for Concrete & Asphalt, Swiss Federal Laboratories for Materials Science and Technology (Empa) 8600, Dübendorf, Switzerland.
References (54)
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1. 1) Ahmed, O., Ahmad, S., & Adekunle, S. K. (2024). Carbon dioxide sequestration in cementitious materials: A review of techniques, material performance, and environmental impact. Journal of CO2 Utilization, 83, 102812. https://doi.org/10.1016/j.jcou.2024.10281210.1016/j.jcou.2024.102812 ↗
2. 2) Andrew, R. M. (2018). Global CO2 emissions from cement production. Earth System Science Data, 10(1), 195-217. https://doi.org/10.5194/essd-10-195-201810.5194/essd-10-195-2018 ↗
3. 3) Aramendía, M. A., Borau, V., Jiménez, C., Marinas, J. M., Romero, F. J., & Ruiz, J. R. (1998). XRD and solid-state NMR study of magnesium oxide–magnesium orthophosphate systems. Journal of Solid State Chemistry, 135(1), 96-102. https://doi.org/10.1006/jssc.1997.760210.1006/jssc.1997.7602 ↗
4. 4) Badjatya, P., Akca, A. H., Fraga Alvarez, D. V., Chang, B., Ma, S., Pang, X., Wang, E., Van Hinsberg, Q., Esposito, D. V., & Kawashima, S. (2022). Carbon-negative cement manufacturing from seawater-derived magnesium feedstocks. Proceedings of the National Academy of Sciences, 119(34), e2114680119. https://doi.org/10.1073/pnas.211468011910.1073/pnas.2114680119 ↗
5. 5) Bernard, E., Nguyen, H., Kawashima, S., Lothenbach, B., Manzano, H., Provis, J., Scott, A., Unluer, C., Winnefeld, F., & Kinnunen, P. (2023). MgO-based cements – Current status and opportunities. RILEM Technical Letters, 8, 65-78. https://doi.org/10.21809/rilemtechlett.2023.17710.21809/rilemtechlett.2023.177 ↗
6. 6) Bernard, E., Yio, M., Rentsch, D., Chen, H., & Myers, R. J. (2024). Insights on the effects of carbonates and phosphates on the hydration of magnesia (alumino-)silicate cements. Applied Geochemistry, 167, 106001. https://doi.org/10.1016/j.apgeochem.2024.10600110.1016/j.apgeochem.2024.106001 ↗
7. 7) Britvin, S. N., Ferraris, G., Ivaldi, G., Bogdanova, A. N., & Chukanov, N. V. (2002). Cattiite, Mg3(PO4)2·22H2O, a new mineral from Zhelezny Mine (Kovdor Massif, Kola Peninsula, Russia). Neues Jahrbuch für Mineralogie - Monatshefte, 2002(4), 160-168. https://doi.org/10.1127/0028-3649/2002/2002-016010.1127/0028-3649/2002/2002-0160 ↗
8. 8) Caneda-Martínez, L., Bessaies-Bey, H., Yu, X., Mourda, K., Belin, P., González-Fonteboa, B., & Roussel, N. (2026). Chemical and mechanical origin of ettringite morphology and packing properties. Cement and Concrete Research, 203, 108146. https://doi.org/10.1016/j.cemconres.2026.10814610.1016/j.cemconres.2026.108146 ↗
9. 9) Chauhan, C. K., & Joshi, M. J. (2014). Growth and characterization of struvite-Na crystals. Journal of Crystal Growth, 401, 221-226. https://doi.org/10.1016/j.jcrysgro.2014.01.05210.1016/j.jcrysgro.2014.01.052 ↗
10. 10) Chen, D., Arancibia-Miranda, N., Escudey, M., Fu, J., Lu, Q., Amon, C. H., Galatro, D., & Guzmán, A. M. (2023). Nonlinear dependence (on ionic strength, pH) of surface charge density and zeta potential in microchannel electrokinetic flow. Heliyon, 9(10), e20888. https://doi.org/10.1016/j.heliyon.2023.e2088810.1016/j.heliyon.2023.e20888 ↗
11. 11) Chu, S. H., Yang, E. H., & Unluer, C. (2023). Chemical synthesis of magnesium oxide (MgO) from brine towards minimal energy consumption. Desalination, 556, 116594. https://doi.org/10.1016/j.desal.2023.11659410.1016/j.desal.2023.116594 ↗
12. 12) Dong, H., Unluer, C., Yang, E.-H., & Al-Tabbaa, A. (2018a). Recovery of reactive MgO from reject brine via the addition of NaOH. Desalination, 429, 88-95. https://doi.org/10.1016/j.desal.2017.12.02110.1016/j.desal.2017.12.021 ↗
13. 13) Dong, H., Yang, E.-H., Unluer, C., Jin, F., & Al-Tabbaa, A. (2018b). Investigation of the properties of MgO recovered from reject brine obtained from desalination plants. Journal of Cleaner Production, 196, 100-108. https://doi.org/10.1016/j.jclepro.2018.06.03210.1016/j.jclepro.2018.06.032 ↗
14. 14) Ferrari, L., Kaufmann, J., Winnefeld, F., & Plank, J. (2010). Interaction of cement model systems with superplasticizers investigated by atomic force microscopy, zeta potential, and adsorption measurements. Journal of Colloid and Interface Science, 347(1), 15-24. https://doi.org/10.1016/j.jcis.2010.03.00510.1016/j.jcis.2010.03.005 ↗
15. 15) Flatt, R. J., Houst, Y. F., Bowen, P., Hofmann, H., Widmer, J., Sulser, U., Maeder, U., & Bürge, T. A. (1997). Adsorption of superplasticizers on model powders: Temperature dependence, effect on zeta potential and role of chemical structure. In: H. Justness, Ed. 10th International Congress on the Chemistry of Cement. Gothenburg 2-6 June 1997. Gothenburg: Amarkai AB and Congrex AB.
16. 16) Frost, R. L., Martens, W., Williams, P. A., & Kloprogge, J. T. (2002). Raman and infrared spectroscopic study of the vivianite-group phosphates vivianite, baricite and bobierrite. Mineralogical Magazine, 66(6), 1063-1073. https://doi.org/10.1180/002646102666007710.1180/0026461026660077 ↗
17. 17) German, A., Winnefeld, F., Lura, P., Rentsch, D., & Lothenbach, B. (2023). Hydrous carbonate-containing brucite (HCB) in MgO/hydromagnesite blends. Cement and Concrete Research, 173, 107304. https://doi.org/10.1016/j.cemconres.2023.10730410.1016/j.cemconres.2023.107304 ↗
18. 18) Habert, G., Miller, S. A., John, V. M., Provis, J. L., Favier, A., Horvath, A., & Scrivener, K. L. (2020). Environmental impacts and decarbonization strategies in the cement and concrete industries. Nature Reviews Earth & Environment, 1(11), 559-573. https://doi.org/10.1038/s43017-020-0093-310.1038/s43017-020-0093-3 ↗
19. 19) Hummel, W., & Thoenen, T. (2023). The PSI chemical thermodynamic database 2020 (Nagra Technical Report NTB 21-03). Wettingen, Switzerland: National Cooperative for the Disposal of Radioactive Waste (NAGRA).
20. 20) Jansen, D., German, A., Ectors, D., & Winnefeld, F. (2024). Stacking faults of the hydrous carbonate-containing brucite (HCB) phase in hydrated magnesium carbonate cements. Cement and Concrete Research, 175, 107371. https://doi.org/10.1016/j.cemconres.2023.10737110.1016/j.cemconres.2023.107371 ↗
21. 21) Jia, Y., Wang, B., Wu, Z., Han, J., Zhang, T., Vandeperre, L. J., & Cheeseman, C. R. (2016). Role of sodium hexametaphosphate in MgO/SiO2 cement pastes. Cement and Concrete Research, 89, 63-71. https://doi.org/10.1016/j.cemconres.2016.08.00310.1016/j.cemconres.2016.08.003 ↗
22. 22) Kamala Ilango, N., Nguyen, H., Alzeer, M., Winnefeld, F., & Kinnunen, P. (2025). Stabilization of nesquehonite for application in carbon capture utilization and storage. Materials Advances, 6(2), 552-556. https://doi.org/10.1039/D4MA00947A10.1039/D4MA00947A ↗
23. 23) Kuenzel, C., Zhang, F., Ferrándiz-Mas, V., Cheeseman, C. R., & Gartner, E. M. (2018). The mechanism of hydration of MgO-hydromagnesite blends. Cement and Concrete Research, 103, 123-129. https://doi.org/10.1016/j.cemconres.2017.10.00310.1016/j.cemconres.2017.10.003 ↗
24. 24) Kuhn, R., Lothenbach, B., Lura, P., Habert, G., & Bernard, E. (2026a). Effects of carbonate and phosphate admixtures on MgO dissolution and Mg(OH)2 precipitation. Cement and Concrete Research, 204, 108207. https://doi.org/10.1016/j.cemconres.2026.10820710.1016/j.cemconres.2026.108207 ↗
25. 25) Kuhn, R., Lura, P., Habert, G., & Bernard, E. (2026b). Early properties of MgO-based cement for the stabilization of kaolinite clay. Cement and Concrete Composites, 171, 106606. https://doi.org/10.1016/j.cemconcomp.2026.10660610.1016/j.cemconcomp.2026.106606 ↗
26. 26) Kuhn, R., Lura, P., Rentsch, D., Habert, G., & Bernard, E. (2026c). Dispersant mechanisms in clays stabilized with MgO-based cement. Cement and Concrete Research, 199, 108040. https://doi.org/10.1016/j.cemconres.2025.10804010.1016/j.cemconres.2025.108040 ↗
27. 27) Kulik, D. A., Wagner, T., Dmytrieva, S. V., Kosakowski, G., Hingerl, F. F., Chudnenko, K. V., & Berner, U. R. (2012). GEM-Selektor geochemical modeling package: Revised algorithm and GEMS3K numerical kernel for coupled simulation codes. Computational Geosciences, 17(1), 1-24. https://doi.org/10.1007/s10596-012-9310-610.1007/s10596-012-9310-6 ↗
28. 28) Kumar, S., Lei, J., Yang, E.-H., & Unluer, C. (2022). Influence of different additives on the rheology and microstructural development of MgO–SiO2 mixes. Composites Part B: Engineering, 235, 109784. https://doi.org/10.1016/j.compositesb.2022.10978410.1016/j.compositesb.2022.109784 ↗
29. 29) Lagaly, G., Schulz, O., & Zimehl, R. (1997). Dispersionen und Emulsionen: Eine Einführung in die Kolloidik feinverteilter Stoffe einschließlich der Tonminerale. Berlin and Heidelberg: Springer-Verlag. (in German) https://doi.org/10.1007/978-3-642-59248-510.1007/978-3-642-59248-5 ↗
30. 30) Lothenbach, B. (2010). Thermodynamic equilibrium calculations in cementitious systems. Materials and Structures, 43(10), 1413-1433. https://doi.org/10.1617/s11527-010-9592-x10.1617/s11527-010-9592-x ↗
31. 31) Lothenbach, B., Bernard, E., Zhou, Z., German, A., Montserrat-Torres, P., & Winnefeld, F. (2026a). Critical review of the properties of MgO - magnesium carbonate cements. Cement and Concrete Research, 200, 108092. https://doi.org/10.1016/j.cemconres.2025.10809210.1016/j.cemconres.2025.108092 ↗
32. 32) Lothenbach, B., Durdziński, P., & De Weerdt, K. (2016). Thermogravimetric analysis. In: K. Scrivener, R. Snellings, & B. Lothenbach, Eds. A Practical Guide to Microstructural Analysis of Cementitious Materials. Boca Raton, Florida: CRC Press, 177-211.
33. 33) Lothenbach, B., Montserrat-Torres, P., Schreiner, C., & Winnefeld, F. (2026b). Solubility of artinite. Journal of Advanced Concrete Technology, 24(4), 174-190. https://doi.org/10.3151/jact.24.17410.3151/jact.24.174 ↗
34. 34) Lothenbach, B., Xu, B., & Winnefeld, F. (2019). Thermodynamic data for magnesium (potassium) phosphates. Applied Geochemistry, 111, 104450. https://doi.org/10.1016/j.apgeochem.2019.10445010.1016/j.apgeochem.2019.104450 ↗
35. 35) Massiot, D., Fayon, F., Capron, M., King, I., Le Calvé, S., Alonso, B., Durand, J., Bujoli, B., Gan, Z., & Hoatson, G. (2002). Modelling one- and two-dimensional solid-state NMR spectra. Magnetic Resonance in Chemistry, 40(1), 70-76. https://doi.org/10.1002/mrc.98410.1002/mrc.984 ↗
36. 36) Montserrat-Torres, P., Hallet, V., Winnefeld, F., & Lothenbach, B. (2026). Phase evolution of MgO-nesquehonite cements. Journal of Advanced Concrete Technology, 24(6), 341-354.10.3151/jact.24.341 ↗
37. 37) Montserrat-Torres, P., Winnefeld, F., & Lothenbach, B. (2025). Impact of nesquehonite on hydration and strength of MgO-based cements. Cement and Concrete Research, 189, 107772. https://doi.org/10.1016/j.cemconres.2024.10777210.1016/j.cemconres.2024.107772 ↗
38. 38) O’Brien, R. W., Cannon, D. W., & Rowlands, W. N. (1995). Electroacoustic determination of particle size and zeta potential. Journal of Colloid and Interface Science, 173(2), 406-418. https://doi.org/10.1006/jcis.1995.134110.1006/jcis.1995.1341 ↗
39. 39) Peng, Y., & Unluer, C. (2024). Evaluation of rheo-viscoelasticity of magnesium-silicate-hydrate mixes incorporating different superplasticizers. Developments in the Built Environment, 20, 100544. https://doi.org/10.1016/j.dibe.2024.10054410.1016/j.dibe.2024.100544 ↗
40. 40) Pettauer, M., Baldermann, A., Eder, S., & Dietzel, M. (2024). Hydration of MgO: Reaction kinetics and pH control on brucite crystal morphology. Crystal Growth & Design, 24(7), 3085-3092. https://doi.org/10.1021/acs.cgd.4c0024310.1021/acs.cgd.4c00243 ↗
41. 41) Scott, A., Oze, C., Shah, V., Yang, N., Shanks, B., Cheeseman, C., Marshall, A., & Watson, M. (2021). Transformation of abundant magnesium silicate minerals for enhanced CO2 sequestration. Communications Earth & Environment, 2(1), 25. https://doi.org/10.1038/s43247-021-00099-610.1038/s43247-021-00099-6 ↗
42. 42) Senevirathna, H. L., Lee, W. P. C., Wu, S., Bai, K., & Wu, P. (2025). Transforming desalination brine into highly reactive magnesium oxide and life cycle analysis. Watershed Ecology and the Environment, 7, 36-46. https://doi.org/10.1016/j.wsee.2025.01.00110.1016/j.wsee.2025.01.001 ↗
43. 43) Silva, M., & Baltrusaitis, J. (2020). A review of phosphate adsorption on Mg-containing materials: Kinetics, equilibrium, and mechanistic insights. Environmental Science: Water Research & Technology, 6(12), 3178-3194.10.1039/D0EW00679C ↗
44. 44) Snellings, R., Chwast, J., Cizer, Ö., De Belie, N., Dhandapani, Y., Durdzinski, P., Elsen, J., Haufe, J., Hooton, D., Patapy, C., Santhanam, M., Scrivener, K., Snoeck, D., Steger, L., Tongbo, S., Vollpracht, A., Winnefeld, F., & Lothenbach, B. (2018). RILEM TC-238 SCM recommendation on hydration stoppage by solvent exchange for the study of hydrate assemblages. Materials and Structures, 51(6), 172. https://doi.org/10.1617/s11527-018-1298-510.1617/s11527-018-1298-5 ↗
45. 45) Tonelli, M., Martini, F., Milanesi, A., Calucci, L., Geppi, M., Borsacchi, S., & Ridi, F. (2019). Effect of phosphate additives on the hydration process of magnesium silicate cements: Thermal and spectroscopic characterization. Journal of Thermal Analysis and Calorimetry, 138(5), 3311-3321. https://doi.org/10.1007/s10973-019-08847-910.1007/s10973-019-08847-9 ↗
46. 46) Traynor, B., Uvegi, H., Olivetti, E., Lothenbach, B., & Myers, R. J. (2020). Methodology for pH measurement in high alkali cementitious systems. Cement and Concrete Research, 135, 106122. https://doi.org/10.1016/j.cemconres.2020.10612210.1016/j.cemconres.2020.106122 ↗
47. 47) Vijayan, D. S., Gopalaswamy, S., Sivasuriyan, A., Koda, E., Sitek, W., Vaverková, M. D., & Podlasek, A. (2024). Advances and applications of carbon capture, utilization, and storage in civil engineering: A comprehensive review. Energies, 17(23), 6046. https://doi.org/10.3390/en1723604610.3390/en17236046 ↗
48. 48) Wagner, T., Kulik, D. A., Hingerl, F. F., & Dmytrieva, S. V. (2012). GEM-Selektor geochemical modeling package: TSolMod library and data interface for multicomponent phase models. The Canadian Mineralogist, 50(5), 1173-1195. https://doi.org/10.3749/canmin.50.5.117310.3749/canmin.50.5.1173 ↗
49. 49) Winnefeld, F., Epifania, E., Montagnaro, F., & Gartner, E. M. (2019). Further studies of the hydration of MgO-hydromagnesite blends. Cement and Concrete Research, 126, 105912. https://doi.org/10.1016/j.cemconres.2019.10591210.1016/j.cemconres.2019.105912 ↗
50. 50) Xu, B., Coumes, C. C. D., Lambertin, D., & Lothenbach, B. (2023). Compressive strength and hydrate assemblages of wollastonite-blended magnesium potassium phosphate cements exposed to different pH conditions. Cement and Concrete Composites, 143, 105255. https://doi.org/10.1016/j.cemconcomp.2023.10525510.1016/j.cemconcomp.2023.105255 ↗
51. 51) Xu, B., Lothenbach, B., Leemann, A., & Winnefeld, F. (2018). Reaction mechanism of magnesium potassium phosphate cement with high magnesium-to-phosphate ratio. Cement and Concrete Research, 108, 140-151. https://doi.org/10.1016/j.cemconres.2018.03.01310.1016/j.cemconres.2018.03.013 ↗
52. 52) Xu, B., Winnefeld, F., Kaufmann, J., & Lothenbach, B. (2019). Influence of magnesium-to-phosphate ratio and water-to-cement ratio on hydration and properties of magnesium potassium phosphate cements. Cement and Concrete Research, 123, 105781. https://doi.org/10.1016/j.cemconres.2019.10578110.1016/j.cemconres.2019.105781 ↗
53. 53) Zhang, T., Vandeperre, L. J., & Cheeseman, C. R. (2014). Formation of magnesium silicate hydrate (M-S-H) cement pastes using sodium hexametaphosphate. Cement and Concrete Research, 65, 8-14. https://doi.org/10.1016/j.cemconres.2014.07.00110.1016/j.cemconres.2014.07.001 ↗
54. 54) Zhou, Z., Bernard, E., & Lothenbach, B. (2025). Effect of nesquehonite and silica on magnesia-silicate-carbonate cements. Cement and Concrete Research, 194, 107892.10.1016/j.cemconres.2025.107892 ↗