"RIV/60461373:22310/12:43894978!RIV13-GA0-22310___" . . . "5"^^ . "P(GAP104/10/2344), P(GAP104/12/0102)" . . "9"^^ . "Efflorescence; Leaching; Geopolymer; N-A-S-H gel; Aluminosilicate gel"@en . . . . . "Kopeck\u00FD, Lubom\u00EDr" . "0862-5468" . "120735" . "\u0160milauer, V\u00EDt" . "[685A0D90B501]" . "A weak alkali bond in (N,K)-A-S-H gels: evidence from leaching and modeling" . . "A weak alkali bond in (N,K)-A-S-H gels: evidence from leaching and modeling"@en . . "Hlav\u00E1\u010Dek, Petr" . . . "56" . "2"^^ . "22310" . . . "A weak alkali bond in (N,K)-A-S-H gels: evidence from leaching and modeling" . "The alkali bond in (N, K)-A-S-H gels presents an up-to-date insufficiently resolved issue with significant consequences for efflorescence in alkali-activated materials. A series of experiments shows nearly all alkalis are leachable from alkaliactivated fly-ash and metakaolin in excessive amounts of deionized water. A diffusion-based model describes well the alkali leaching process. Negligible changes of the (N, K)-A-S-H gel nanostructure indicate that Na,K do not form the gel backbone and H3O+ is probably the easiest substitution for the leached alkalies. Small changes in the long-term compressive strength of leached specimens support this hypothesis."@en . . "CZ - \u010Cesk\u00E1 republika" . "\u0160kv\u00E1ra, Franti\u0161ek" . . "C\u00EDlov\u00E1, Zuzana" . "A weak alkali bond in (N,K)-A-S-H gels: evidence from leaching and modeling"@en . . "RIV/60461373:22310/12:43894978" . "Ceramics-Silik\u00E1ty" . "4" . . "The alkali bond in (N, K)-A-S-H gels presents an up-to-date insufficiently resolved issue with significant consequences for efflorescence in alkali-activated materials. A series of experiments shows nearly all alkalis are leachable from alkaliactivated fly-ash and metakaolin in excessive amounts of deionized water. A diffusion-based model describes well the alkali leaching process. Negligible changes of the (N, K)-A-S-H gel nanostructure indicate that Na,K do not form the gel backbone and H3O+ is probably the easiest substitution for the leached alkalies. Small changes in the long-term compressive strength of leached specimens support this hypothesis." . . . .