Экспериментальное И Физико-Химическое Моделирование Взаимодействия Магнезиально-Железистого Шлака С Щелочными Растворами И Изучение Свойств Геополимеров На Его Основе

Interaction of magnesia-ferriferous slag ground in air and carbon dioxide atmosphere with alkaline solutions, has been studied. Experimental data on Si and Al dissolution extent from the slag treated by NaOH solution have been obtained, the+ dependence of this dissolution extent on the ball mill grinding time, grinding atmosphere and NaOH concentration has been investigated. It has been concluded that the surface of the slag particles mechanochemically carbonized by grinding in CO2 atmosphere exhibits enhanced reactivity and this fact is correlated with the rise of the compressive strength of geopolymers prepared from this slag. Experimental results are in a good agreement with the data of the thermodynamic modelling of the interaction between the slag and NaOH carried out using the “Selector” software.