white cement is white and grey cement is grey
Yes White cement is stronger than grey cement. Due to low content of iron oxide and high content of limestone the strength is greater .
One dries grey and one dries white. Simple.
The cement is grey due to the presence of iron oxide. The cement is white due to the absence of iron oxide. Generally white cement has more strength than grey cement and it is more expensive.
silica
Concrete is an aggregate which includes cement.See the related link listed below for more information: