It is made by using the catalytic principle of alkaline activator (caustic alkali, alkali-containing silicate and aluminate), including alkali slag cement, geopolymer or geopolymer cement, etc. This material is considered as a low-carbon cementitious material because it has low energy consumption, low emission and similar properties to cement-based cementitious materials.
Catalytic principle
Alkali-activated cementitious materials use the catalytic principle of alkali activator to catalyze the hydration of slag and accelerate the hydration reaction of slag, but with the passage of time, the hydration reaction slows down or basically stops. Reasons for the slowdown:
First, the alkaline activator (catalyst) participates in the reaction to generate new minerals, which causes the activator (catalyst) to be permanently poisoned and a large number of active ions are reduced.
Second, the newly generated minerals adhere to the surface, blocking the path of active ion reaction, making the reaction speed slow down rapidly or unable to proceed.