With expansive cement early strength sulphoaluminate cement clinker, according to appropriate proportion with CSA, gypsum and so on many kinds of functional admixture, the ground has made expansion performance of water hydraulic cementitious materials. The characteristic is that it has the compensation shrinkage, early and late strength, and can significantly improve the crack resistance and seepage resistance of concrete (or mortar). Expansive cement with volume expansion in the process of hydration and hardening. General Portland cement hardening in the air, the volume will shrink. Shrinkage will make the structure of cement stone produce micro cracks, reduce the density of the structure of the cement, and affect the structure of the anti permeability, frost resistance, corrosion resistance and so on. Expansion cement in the hardening process of the volume will not shrink, high expansion coefficient, can be resolved due to the adverse consequences of contraction.                           

Performance characteristics                      

1 by the expansive cement concrete in water free expansion rate is 0.02%-0.8%, you can create 0.2 ~ 0.8MPa stress in concrete, to meet the requirements of shrinkage compensation, can reduce or prevent the shrinkage cracking of concrete;                      

2 the number of anti permeability of micro expansive cement concrete is greater than C40. The cement concrete self waterproofing, material saving, and shorten the construction period, and good durability;                      

3 the early strength of the new type of micro expansive cement is high, the strength of the later stage is larger, and the long-term strength increases steadily;                      

4 expansive cement concrete prepared by internal establish expansion stress, produce stronger grip and reinforced;                      

5 non chlorine salt, no corrosion of reinforcement.