The influence of SiO2:Na2O molar ratio and the nature of an alkali metal (Na vs. K) in commercial aqueous alkali silicate on the microstructure, textural properties, phase composition, and hydrolytic stability of an alkali silicate binder have been investigated using scanning electron microscopy, nitrogen adsorption/desorption technique, X-ray diffractometry, thermal analysis, and dissolution tests. It has been found that microstructure and textural properties of the alkali silicate binder depend both on silica to alkali molar ratio and type of alkali metal (Na vs. K). Sodium silicate binder obtained from commercial silicate solution with lower SiO2:Na2O molar ratio (2.2) exhibits a globular microstructure of silica xerogel with high content of micropores, whereas the binder formulated with SiO2:Na2O molar ratio 3.2 is characterized by more open cluster structure with lower content of micropores. It is observed that surface specific area estimated by Brunauer, Emmett, and Teller method and mesopore volume obtained by the Barrett–Joyner–Halenda method for sodium silicate binder are substantially higher than those for potassium silicate binder. The ultimate hydrolytic stability of the sodium silicate binder increases slightly with increase in the silica to alkali molar ratio within the studied range. Decreasing in SiO2:Na2O molar ratio and replacement of sodium silicate solution by potassium silicate solution in the corresponding filled composition lead to the improvement of mechanical properties and decrease in open porosity.
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Robertson JC (1845) Mech Mag 42:441
Dimas D, Giannopoulou I, Panias D (2009) J Mater Sci 44:3719. doi:10.1007/s10853-009-3497-5
Bernal SA, Rodriguez ED, Mejia de Gutierrez R, Gordillo M, Provis JL (2011) J Mater Sci 46:5477. doi:10.1007/s10853-011-5490-z
Weng L, Sagoe-Crentsil K (2007) J Mater Sci 42:2997. doi:10.1007/s10853-006-0820-2
Barabakdze V, Kozlov V, Mikulski V, Nikolov I (1995) Durability of building structures and constructions from composite materials., Russian Translations Series 109A.A. Balkema Publishers, Rotterdam
O’Connor SJ, MacKenzie KJD (2010) J Mater Sci 45:3284. doi:10.1007/s10853-010-4340-8
John LP, Grant CL, Jannie van Deventer SL (2005) Chem Mater 17:3075. doi:10.1021/cm050230i
Korneev V, Danilov V (1996) Liquid and soluble glass. Construction Publishing, St. Petersburg (in Russian)
Shi C (2004) US Patent No. 6749679 B2. US Patent Office, Washington, DC
Beckwith WF (1996) US Patent No 3240736. US Patent Office, New Jersey
Self JM, Taylor SC (1977) Patent No 4011195. US Patent Office, Pittsburg
Tertre Y (1968) US Patent No 3392127. US Patent Office, Paris
Iler R (1978) The chemistry of silica: solubility, polymerization, colloid and surface properties, and biochemistry. Wiley, New York
Brinker J, Scherer G (1990) Sol–gel science the physics and chemistry of sol–gel processing. Academic Press, Boston
Harris RK, Jones J, Knight CTG, Hewman RH (1984) J Mol Liq 29:63
Harris RK, O’Connor MJ, Curzon EH, Howart OW (1984) J Magn Res 57:115
Pope EJ, Mackenzie JD (1986) J Non Cryst Solids 87:185
Bondar D, Lynsdale C, Milestone N, Nassani N, Ramezanianpour A (2011) J Cem Concr Compos 33:251
Alexander GB (1953) J Am Chem Soc 75:5655
British Standards Institution BS EN 12390-3 (2002) Testing of hardened concrete—compressive strength of test specimens. BSI, London
Christopher H, William DH (2002) Water transport in brick, stone, and concrete. Taylor and Francis, New York
Brinker CJ, Scherer GW (1985) J Non Cryst Solids 70:301
Jérôme F, Castetbona A, Trouveb G, Potin-Gautiera M (2006) Chem Phys Lett 427:356
Hench LL (1998) Sol–gel silica: properties, processing, and technology transfer. Noyes Publications, New Jersey
Chotti P (1981) J Less Common Metals 80:105
Vanka M, Vachuska J (1980) Thermochim Acta 36:387
Chotti P (1981) J Less Common Metals 80:97
Freeman ES, Hogan VO (1964) Anal Chem 36:2337
Stodolski R, Kolditz L (1985) J Fluor Chem 29:73
Wijnen PW, Wijnen JG, Beelen TP, Haan JW, Rummens LJ, Santen RA (1989) J Non Cryst Solids 109:85
The authors are thankful to the professors Don Seo and Valery Putlyaev for useful discussions and to Dr. Anatoli Korkin for careful reading of the manuscript.
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Skorina, T., Tikhomirova, I. Alkali silicate binders: effect of SiO2/Na2O ratio and alkali metal ion type on the structure and mechanical properties. J Mater Sci 47, 5050–5059 (2012). https://doi.org/10.1007/s10853-012-6382-6
- Sodium Silicate
- Open Porosity
- Silicate Solution
- Water Glass
- Hydrolytic Stability