C30 concrete without waterproof additives to achieve S6 waterproof it?

C30 concrete without waterproof additives to achieve S6 waterproof it?

C30 concrete without waterproof additives can only reach P6, can not reach S6, must be added waterproof additives can (> _ <)

C30 concrete without waterproof admixture can also achieve the effect of S6, as long as the concrete vibrating dense, water-cement ratio control, the field without admixture, you can also add some cement instead.

C30 concrete without waterproof additives can only reach P6, can not reach S6, must be added waterproof additives can