How the changing of workability when the concrete mixture containing high aggregate content?

Aggregate to cement ratio is an important thing which affects the workability....!

If the aggregate/cement ratio is higher , the concrete will be Leaner. Less quantity of paste is available for lubrication, Hence workability decreases..!!

On the other hand if the aggregate/cement ratio is lower, the concrete will be fatty. Higher quantity of paste is available for lubrication. Hence workability increases. !

Thus Higher aggregate content leads to lowering of workability....!