What is the relationship between water glass and cement content?

What is the relationship between water glass and cement content?

5%, a little water glass can make the cement set quickly, 1 minute, so add some retarder

1: What is the density of 1.65 cement slurry

What is the density of cement?
If the cement is completely soluble in water, the density is 1.65 times the cement density + 1

How to calculate the amount of cement when the mixing ratio of grouting is 1:1
The mix proportion for grouting is water: Cement = 1:1. The density of cement is calculated by 3100 or 1600. What is the density of 1600? We calculate it by 3100. Others asked me that according to my opinion, the cement is 3100 kg, a ton of cement = 20 bags, 50kg cement = 0.32 M3
Excuse me, is this statement correct? If not, what should it look like? If it is correct, please provide the basis
The cement is P.O 52.5r cement

The water cement ratio of 1:1 refers to the weight ratio, which has nothing to do with the volume. 1600 is the volume weight, which is the weight per unit volume in the natural accumulation state. 3100 is the density, which is the weight in the seamless state,
The weight of one side of cement is equal to the unit weight of cement, i.e. 1600
The weight of a ton of cement is 1000, and the volume is 0.625 cubic meters according to the volume weight of 1600