The influence of aluminum from metakaolin on chemical binding of chloride ions in hydrated cement pastes
Source abstract
Abstract
Abstract In this study, chloride ions binding capacity of Portland cement blended with 10–30% of metakaolin was investigated. Chemical binding of chloride ions was found depending more on phase assemblage of pastes rather than merely on available aluminum content in the blends. More monosulfoaluminate formed at low replacement levels, while at high replacement levels of metakaolin, stratlingite formation in the blends was favored. When exposed to 0.53 M NaCl solution at ambient temperature, monosulfoaluminate converted to Friedel's salt completely, and played a principal role in chemical binding of chloride ions while ettringite and stratlingite did not participate in the chemical binding of chloride ions. Considering the exposure condition, the contribution of monocarboaluminate in chemical binding was less significant than that of monosulfoaluminate. Results demonstrated that well formulated Portland cement-metakaolin blends with appreciate metakaolin replacement level and sulfate supply are expected to have good chloride binding capacity.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Concrete and Cement Materials Research · Magnesium Oxide Properties and Applications · Innovative concrete reinforcement materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (33)
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1. Antoni · 2013
2. Cement substitution by a combination of metakaolin and limestone10.1016/j.cemconres.2012.09.006 ↗
3. Effect of cement type on chloride binding and corrosion of steel in concrete10.1016/0008-8846(95)00080-V ↗
4. Impact of chloride on the mineralogy of hydrated Portland cement systems10.1016/j.cemconres.2010.03.002 ↗
5. Hydration states of AFm cement phases10.1016/j.cemconres.2015.02.011 ↗
6. Mechanism of hydration of the metakaolin–lime–water system10.1016/S0008-8846(00)00456-7 ↗
7. Aluminum incorporation in the CSH phase of white Portland cement-metakaolin blends studied by 27Al and 29Si MAS NMR spectroscopy10.1111/jace.13006 ↗
8. Developing chloride resisting concrete using PFA10.1016/S0008-8846(97)00146-4 ↗
9. Durdziński · 2016
10. Pessimum effect of externally applied chlorides on expansion due to delayed ettringite formation: proposed mechanism10.1016/j.cemconres.2005.11.020 ↗
11. Chloride binding related to hydration products part I: ordinary portland cement10.1016/j.cemconres.2011.09.016 ↗
12. Influence of MK on the reaction kinetics in MK/lime and MK-blended cement systems at 20°C10.1016/S0008-8846(00)00465-8 ↗
13. Chloride binding of cement estimated by binding isotherms of hydrates10.3151/jact.3.77 ↗
14. A review of chloride binding in cementitious systems
15. Thermodynamic modeling of hydrated white Portland cement–metakaolin–limestone blends utilizing hydration kinetics from 29Si MAS NMR spectroscopy10.1016/j.cemconres.2016.04.012 ↗
16. Study of chloride binding and diffusion in GGBS concrete10.1016/S0008-8846(02)00712-3 ↗
17. A study of the effect of chloride binding on service life predictions10.1016/S0008-8846(00)00339-2 ↗
18. Temperature dependence, 0 to 40 °C, of the mineralogy of Portland cement paste in the presence of calcium carbonate10.1016/j.cemconres.2009.11.010 ↗
19. The AFm phase in Portland cement10.1016/j.cemconres.2006.10.010 ↗
20. McGrath · 1996
21. Stability of Strätlingite in the CASH system10.1617/s11527-015-0789-x ↗
22. Interactions between calcium silicate hydrate (CSH) and calcium, chloride, bromide and nitrate10.1016/j.cemconres.2016.08.002 ↗
23. Role of calcium on chloride binding in hydrated Portland cement–metakaolin–limestone blends10.1016/j.cemconres.2017.02.003 ↗
24. Mechanism of Friedel's salt formation in cements rich in tri-calcium aluminate10.1016/S0008-8846(96)85009-5 ↗
25. Chloride binding capacity and binding isotherms of OPC pastes and mortars10.1016/0008-8846(93)90089-R ↗
26. The suitability of solvent exchange techniques for studying the pore structure of hardened cement paste10.1680/adcr.1989.2.5.29 ↗
27. The effect of supplementary cementitious materials on chloride binding in hardened cement paste10.1016/j.cemconres.2011.01.001 ↗
28. Chloride binding of cement-based materials subjected to external chloride environment- a review, Constr10.1016/j.conbuildmat.2008.02.004 ↗
29. Comparison of methods for arresting hydration of cement10.1016/j.cemconres.2011.06.003 ↗
30. Chloride ions transport and adsorption in the nano-pores of silicate calcium hydrate: experimental and molecular dynamics studies10.1016/j.conbuildmat.2016.09.110 ↗
31. Experimental and molecular dynamics studies on the transport and adsorption of chloride ions in the nano-pores of calcium silicate phase: the influence of calcium to silicate ratios10.1016/j.micromeso.2017.07.024 ↗
32. Zibara · 2001
33. Influence of the C/S and C/A ratios of hydration products on the chloride ion binding capacity of lime-SF and lime-MK mixtures10.1016/j.cemconres.2007.08.024 ↗