Pozzolanic Portland cement and Special Pozzolanic Portland cement

In the Pozzolanic Portland cement pozzolan is not less than 5% and not more than 15% from the cement mass, and in the Special Pozzolanic Portland cement - not less than 15% and not more than 40%. Application of Pozzolanic Portland cement reduces the permeability of concrete, thereby increases the durability and final resistance of concrete, especially volumetric concrete products against salts and corrosion of concrete and reinforcement. Furthermore, low heat of hydration, low water-to-cement ratio, increasing the viscosity of concrete mixes and prevention of shrinkage and cracking distinguish Pozzolanic Portland cement from other cements