Surface Modification and Model of Glassy Cementitious Materials

Basic theory of surface modification about glassy cementitous materials is presented. At the same time modified glassy cementitous materials were manuractured by means of point activation and disperse and grind aid according to technology or mechanical-chemistry. This theory about surface modification has been proved by some experimental results such as SEM, size distribution, fluidity or the paste, physical-mechani- cal properties or the hardened paste and heat of the hydration. The particle size of modified fly ash is tending to become smaller and the shape or microfine particles seems a ball ; strength of modified glassy cementitous materials and ordinary portland cement compound paste has a obvious increment and fluidity of the paste also has a noticeable improvement ; surface modification also can accelerate the formation of paste structure to a certain degree. Besides a model about the interactive mechanism of modified glassy cementitous materials and ordinary portland cement is Put forward.