If no data is available the w/c ratio can be selected from table 6.3.4(a) of ACI 211.1 based on the required compressive strength. Then, you must check it's workablity.
If no data is available the w/c ratio can be selected from table 6.3.4(a) of ACI 211.1 based on the required compressive strength. Then, you must check it's workablity.