Grey Ordinary Portland Cement Type 1-425

Portland Slag Cement Application

Slag is the material collected on top of blast kiln of smelting iron and known as waste products of steel industry. If slag is gets cold slowly, it is crystal shape that is not consumed a lot. But if we make it cold fast, it gets amorphous or glassy that is used after milling, is applied in cement industry. While milling the slag you have to pay attention that where slag hardness is more that cement, each of them has to be milled separately and finally mix them. In Iran slag cement is divided to 3 kinds that will be said as follows:

1. Portland slag cement with less than 25% of slag
2. Portland slag anti sulfate cement with 25 to 70% of slag
3. Portland slag cement with more than 70% of slag