Looks like there still would be a polymer, but with unstable physical properties. Following patents: US4509985A and US4349386A , all hydroxides has to be bonded or present in a very minimum amount. They initially mix hydroxides with SiO2 to get silicate glue, then add this solution to SiAl oxide powder to get slurry glue. Later this slurry is used as a glue to bond different materials. And looks like the important stuff here, you need to get this slurry first, otherwise adversely exothermic reactions can occur in a main mixture. US4349386A "The quantities of the reactants, namely colloidal silica sol and/or polysilicate, and strong alkalis such as sodium hydroxide and potassium hydroxide, fall in the ranges shown in Table C. Preferably, the ratio (Na2 O,K2 O)/Al2 O3 is about 1.0 and the ratio SiO2 /Al2 O3 is about 4.0. Higher ratios induce a free alkalinity in the solidified polymer and cause alkali silicate migration which can disturb the physical and mechanical properties of the resulting mineral products. However, if the ratio of sodium oxide and potassium oxide combined to aluminum trioxide is lower than 0.8, and the ratio of silicon oxide to aluminum trioxide is lower than 3.5, the alumino-silicate oxide in excess may not polycondense and will remain as a white powder within the hardened NaKPSS product. Preferably, the oxide-mole ratios should be close to stoichiometric values. " "Longer pot life is attained if the strong alkali is not mixed directly with the reactive alumino-silicate oxide. In fact, if the alkalis are added directly to the alumino-silicate oxide solution, the resulting product differs from the polymers of this invention. Direct addition gives a strongly exothermic reaction, and produces a product similar to zeolite A or hydroxysodalite." "Our method of preparing our new polymers comprises making either the alumino-silicate oxide or the sodium and potassium hydroxides. Making of the sodium and potassium hydroxides can be effected by mixing the alkalis in water with polysilicate, and then adding this solution to the alumino-silicate oxide. Preferably, we mix the alumino-silicate oxide with aqueous polysilicate, to the exclusion of alkali, and add this solution to a strong aqueous solution. These two reactant mixtures are stable and retain their reactivity even after long storage periods. Moreover, these mixtures are easy to handle and store." silicate
Are there any "polymer" in alkali-activated-material?
Looks like there still would be a polymer, but with unstable physical properties.
Following patents: US4509985A and US4349386A , all hydroxides has to be bonded or present in a very minimum amount.
They initially mix hydroxides with SiO2 to get silicate glue, then add this solution to SiAl oxide powder to get slurry glue. Later this slurry is used as a glue to bond different materials.
And looks like the important stuff here, you need to get this slurry first, otherwise adversely exothermic reactions can occur in a main mixture.
US4349386A
"The quantities of the reactants, namely colloidal silica sol and/or polysilicate, and strong alkalis such as sodium hydroxide and potassium hydroxide, fall in the ranges shown in Table C. Preferably, the ratio (Na2 O,K2 O)/Al2 O3 is about 1.0 and the ratio SiO2 /Al2 O3 is about 4.0.
Higher ratios induce a free alkalinity in the solidified polymer and cause alkali silicate migration which can disturb the physical and mechanical properties of the resulting mineral products.
However, if the ratio of sodium oxide and potassium oxide combined to aluminum trioxide is lower than 0.8, and the ratio of silicon oxide to aluminum trioxide is lower than 3.5, the alumino-silicate oxide in excess may not polycondense and will remain as a white powder within the hardened NaKPSS product.
Preferably, the oxide-mole ratios should be close to stoichiometric values. "
"Longer pot life is attained if the strong alkali is not mixed directly with the reactive alumino-silicate oxide. In fact, if the alkalis are added directly to the alumino-silicate oxide solution, the resulting product differs from the polymers of this invention. Direct addition gives a strongly exothermic reaction, and produces a product similar to zeolite A or hydroxysodalite."
"Our method of preparing our new polymers comprises making either the alumino-silicate oxide or the sodium and potassium hydroxides. Making of the sodium and potassium hydroxides can be effected by mixing the alkalis in water with polysilicate, and then adding this solution to the alumino-silicate oxide. Preferably, we mix the alumino-silicate oxide with aqueous polysilicate, to the exclusion of alkali, and add this solution to a strong aqueous solution. These two reactant mixtures are stable and retain their reactivity even after long storage periods. Moreover, these mixtures are easy to handle and store."
silicate