... strength. Of these factors, the %CaO, the molar Si–Al in the original mineral, the use of KOH, the extent of dissolution of Si and the molar SirAl ratio in solution show a positivecorrelation, while the ... than the other Al–Si minerals, the contribution of the Al–Si minerals to the gel phase is stillimportant. A separate experiment was conducted on the composition of the gel phase forŽ. Ž . the ... formed from the dissolution of kaolinite in the presence of sodium silicate. Instead, the significance of the molar SirAl ratio during the alkalinedissolution of the individual minerals indicates...