INFLUENCE OF WOLLASTONITE ON HYDRATION AND PROPERTIES OF MAGNESIUM POTASSIUM PHOSPHATE CEMENTS

Haydarov Bekzod; Asamov Javlon; Mansurov Tolmos; Abdurimov Akbar,  Mamirov Akmal

doi:10.5281/zenodo.8020827

INFLUENCE OF WOLLASTONITE ON HYDRATION AND PROPERTIES OF MAGNESIUM POTASSIUM PHOSPHATE CEMENTS

09.06.2023 International Scientific Journal "Science and Innovation". Series A. Volume 2 Issue 6

Haydarov Bekzod, Asamov Javlon, Mansurov Tolmos, Abdurimov Akbar, Mamirov Akmal

Abstract. This study investigates the effect of wollastonite on the hydration and properties of magnesium potassium phosphate (MKP) cements. In MKP cements some efflorescence can occur; the presence of wollastonite suppresses efflorescence as the formation of Mg2KH(PO4)2·15H2O is prevented. The presence of wollastonite leads also to more heat (per g of MKP cement) due to the filler effect and due to the reaction of wollastonite, which increases strength, especially at low water-to-binder (w/b) ratio of 0.25 and at later ages, and lowers the pH values in the cement pore solution. The reaction of wollastonite does not lead to the formation of crystalline hydrates, both experimental and thermodynamic findings suggest the formation of amorphous hydroxyapatite and magnesium silicate hydrates (M-S-H).

Keywords: magnesium potassium phosphate (mkp), cement, wollastonite, reactivity, hydration, strength.

References:

1. A.S. Wagh, Magnesium phosphate ceramics, Chemically Bonded Phosphate Ceramics, Elsevier Science, 2004, pp. 97–110. 2. F. Qiao, C.K. Chau, Z. Li, Property evaluation of magnesium phosphate cement mortar as patch repair material, Constr. Build. Mater. 24 (2010) 695–700. 3. B. Xu, B. Lothenbach, H. Ma, Properties of fly ash blended magnesium potassium phosphate mortars: effect of the ratio between fly ash and magnesia, Cem. Concr. Compos. 90 (2018) 169–177. 4. H. Lahalle, C. Cau Dit Coumes, A. Mesbah, D. Lambertin, C. Cannes, S. Delpech, 5. S. Gauffinet, Investigation of magnesium phosphate cement hydration in diluted suspension and its retardation by boric acid, Cem. Concr. Res. 87 (2016) 77–86. 6. H. Lahalle, C. Cau Dit Coumes, C. Mercier, D. Lambertin, C. Cannes, S. Delpech, 7. S. Gauffinet, Influence of the w/c ratio on the hydration process of a magnesium phosphate cement and on its retardation by boric acid, Cem. Concr. Res. 109 (2018) 159–174. 8. B. Xu, F. Winnefeld, J. Kaufmann, B. Lothenbach, Influence of magnesium-to- phosphate ratio and water-to-cement ratio on hydration and properties of magne- sium potassium phosphate cements, Cem. Concr. Res. 123 (2019) 105781. 9. I. Buj, J. Torras, D. Casellas, M. Rovira, J. de Pablo, Effect of heavy metals and water content on the strength of magnesium phosphate cements, J. Hazard. Mater. 170 (2009) 345–350. 10. I. Buj, J. Torras, M. Rovira, J. de Pablo, Leaching behaviour of magnesium phos- phate cements containing high quantities of heavy metals, J. Hazard. Mater. 175 (2010) 789–794. 11. A.J. Wang, J. Zhang, J.M. Li, A.B. Ma, L.T. Liu, Effect of liquid-to-solid ratios on the properties of magnesium phosphate chemically bonded ceramics, Mat Sci Eng C- Mater 33 (2013) 2508–2512. 12. Y. Yu, C. Xu, H.L. Dai, Preparation and characterization of a degradable magnesium phosphate bone cement, Regen Biomater 3 (2016) 231–237. 13. F. Qiao, C.K. Chau, Z. Li, Setting and strength development of magnesium phos- phate cement paste, Adv. Cem. Res. 21 (2009) 175–180. 14. F. Qiao, W. Lin, C.K. Chau, Z.J. Li, Property assessment of magnesium phosphate cement, Key Eng. Mater. 400–402 (2008) 115–120. 15. M. Le Rouzic, T. Chaussadent, L. Stefan, M. Saillio, On the influence of Mg/P ratio on the properties and durability of magnesium potassium phosphate cement pastes, Cem. Concr. Res. 96 (2017) 27–41. 16. L.J. Gardner, S.A. Bernal, S.A. Walling, C.L. Corkhill, J.L. Provis, N.C. Hyatt, Characterisation of magnesium potassium phosphate cements blended with fly ash and ground granulated blast furnace slag, Cem. Concr. Res. 74 (2015) 78–87. 17. L.J. Gardner, V. Lejeune, C.L. Corkhill, S.A. Bernal, J.L. Provis, M.C. Stennett, 18. N.C. Hyatt, Evolution of phase assemblage of blended magnesium potassium phosphate cement binders at 200° and 1000 °C, Adv. Appl. Ceram. 114 (2015) 386–392. 19. B. Xu, B. Lothenbach, A. Leemann, F. Winnefeld, Reaction mechanism of magne- sium potassium phosphate cement with high magnesium-to-phosphate ratio, Cem. Concr. Res. 108 (2018) 140–151. 20. B. Xu, H. Ma, H. Shao, Z. Li, B. Lothenbach, Influence of fly ash on compressive strength and micro-characteristics of magnesium potassium phosphate cement mortars, Cem. Concr. Res. 99 (2017) 86–94. 21. L. Mo, L. Lv, M. Deng, J. Qian, Influence of fly ash and metakaolin on the micro- structure and compressive strength of magnesium potassium phosphate cement paste, Cem. Concr. Res. 111 (2018) 116–129. 22. S.A. Walling, J.L. Provis, Magnesia-based cements: a journey of 150 years, and cements for the future? Chem. Rev. 116 (2016) 4170–4204. 23. B. Xu, H. Ma, Z. Li, Influence of magnesia-to-phosphate molar ratio on micro- structures, mechanical properties and thermal conductivity of magnesium po- tassium phosphate cement paste with large water-to-solid ratio, Cem. Concr. Res. 68 (2015) 1–9. 24. C. Qian, J. Yang, Effect of disodium hydrogen phosphate on hydration and hard- ening of magnesium potassium phosphate cement, J. Mater. Civ. Eng. 23 (2011) 1405–1411. 25. Y. Li, T. Shi, B. Chen, EXperimental sudy of dipotassium hydrogen phosphate in- fluencing properties of magnesium phosphate cement, J. Mater. Civ. Eng. 28 (2016). 26. Y.C. Chen, L.X. Wang, P. Song, Q. Wang, Effects of magnesium potassium phosphate cements miXed with silica fume on the solidification and reduction of municipal sludge, Iop Conf Ser-Mat Sci 167 (2017). 27. D.D. Zheng, T. Ji, C.Q. Wang, C.J. Sun, X.J. Lin, K.M.A. Hossain, Effect of the combination of fly ash and silica fume on water resistance of magnesium-potassium phosphate cement, Constr. Build. Mater. 106 (2016) 415–421. 28. X.J. Gao, A.L. Zhang, S.X. Li, B.C. Sun, L.C. Zhang, The resistance to high tem- perature of magnesia phosphate cement paste containing wollastonite, Mater. Struct. 49 (2016) 3423–3434. 29. A.S. Wagh, S.Y. Jeong, D. Lohan, A. Elizabeth, Chemically bonded phosphate-sili- cate ceramics (patent), US 6518212B1, US, 2003. 30. N.M.P. Low, J.J. Beaudoin, Mechanical properties of high performance cement binders reinforced with wollastonite micro-fibres, Cem. Concr. Res. 22 (1992) 981–989. 31. N.M.P. Low, J.J. Beaudoin, The effect of wollastonite micro-fibre aspect ratio on reinforcement of Portland cement-based binders, Cem. Concr. Res. 23 (1993) 1467–1479. 32. A.M. Soliman, M.L. Nehdi, Effects of shrinkage reducing admiXture and wollastonite microfiber on early-age behavior of ultra-high performance concrete, Cem. Concr. 33. Compos. 46 (2014) 81–89. 34. W. Ashraf, J. Olek, N. Tian, Multiscale characterization of carbonated wollastonite paste and application of homogenization schemes to predict its effective elastic modulus, Cem. Concr. Compos. 72 (2016) 284–298. 35. B. Lothenbach, G. Le Saout, E. Gallucci, K. Scrivener, Influence of limestone on the hydration of Portland cements, Cem. Concr. Res. 38 (2008) 848–860. 36. K. Mandel, H. Funke, M. Lindner, S. Gelbrich, L. Kroll, T. Schwarz, Recipe devel- opment of low-cost wollastonite-based phosphate cements, Constr. Build. Mater. 189 (2018) 86–94. 37. P. Laniesse, C. Cau Dit Coumes, A. Poulesquen, A. Bourchy, A. Mesbah, G. Le Saout, 38. P. Gaveau, Setting and hardening process of a wollastonite-based brushite cement, Cem. Concr. Res. 106 (2018) 65–76. 39. H.A. Colorado, Z. Wang, J.-M. Yang, Inorganic phosphate cement fabricated with wollastonite, barium titanate, and phosphoric acid, Cem. Concr. Compos. 62 (2015) 13–21. 40. H.A. Colorado, J. Pleitt, C. Hiel, J.M. Yang, H.T. Hahn, C.H. Castano, Wollastonite based-chemically bonded phosphate ceramics with lead oXide contents under gamma irradiation, J. Nucl. Mater. 425 (2012) 197–204. 41. W. Ashraf, J. Olek, Carbonation activated binders from pure calcium silicates: re- action kinetics and performance controlling factors, Cem. Concr. Compos. 93 (2018) 85–98. 42. B. Lothenbach, P. Durdzinski, K. De Weerdt, Thermogravimetric analysis, in: 43. K. Scrivener, B. Lothenbach (Eds.), A Practical Guide to Microstructural Analysis of Cementitious Materials, CRC Press, OXford, UK, 2016, pp. 177–212. 44. F. Winnefeld, B. Lothenbach, Hydration of calcium sulfoaluminate cements — ex- perimental findings and thermodynamic modelling, Cem. Concr. Res. 40 (2010) 1239–1247. 45. B. Lothenbach, Thermodynamic equilibrium calculations in cementitious systems, Mater. Struct. 43 (2010) 1413–1433.