Portland Slag Cement

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

Row	Type of Cement	Type of Test	Forced limits matching Iran Standard under No. ISIRI389	Delijan Cement Specs
3	Portland Slag Cement	3 day Compressive Strength	Min 120 kg/cm2	220 kg/cm2
		7 day Compressive Strength	Min 200 kg/ cm2	300 kg/cm2
		28 day Compressive Strength	Min 320 kg/cm2	400 kg/ cm2