Abstract:
First, shale is calcined from the Bashang Region of Zhangjiakou under the temperature of 850 ℃ for 60 minutes, which will later become the main raw material of alkali-activated cementitious material. Together with the compound activator made from sodium silicate and sodium hydroxide, the alkali-activated cementitious material is prepared. The experiment result shows that when the modulus of the compund activator is 1.2 and its content accounts for 10% of the total mass, the activity of the shale burned with low activity is stimulated and the compression strength of the alkali-activated cementitious material 28d prepared will reach 18.5 Mpa. After the SEM analysis, it can be seen that it is a kind of amorphous aluminosilicate gel like the precursor of zeolites in structure.