1. It is dark grey Powder, which is one kind of compound made of inorganic salts, carrier and chemicals. It is non-toxic, odorless, non-flammable matter, it is not corrosive to steel bar.
2. It can react with the components in concrete and speed the hydrating reaction. It can improve the compressive strength and resistance to penetration, carbonization and freeze.
3. In -5℃——-25℃, 2.5% of Building antifreeze early strength admixture can increase 20—100% of compressive strength of R1-R in 7 days and 20—80% of bending strength. It can reduce 1/2 of 3/4 time for concrete to reach the design strength

4. It offers on bad effects to shrinkage and creep strain, and can improve the resistance of concrete to penetration, carbonization and freeze. It can improve the labor strength and reduce the cost of cement.