Q 1 - Following are the approximate quantities required for 1 m3 of concrete. Check the volumes and adjust, if required, to produce 1 m3.
Cement​ 330 kg
Water​ 195 kg
Fine aggregate​ 730 kg​RD 2.68
Coarse Aggregate​1250 kg​RD 2.64
Air​ 3.5 %


Q 2 – A concrete plant uses the following quantities of materials per cubic metre of concrete,
Cement​ 310 kg
Water​ 180 kg
Fine aggregate​ 750 kg​
Coarse Aggregate​1080 kg​

The concrete is mixed in batches of 3.5 m3. Find the mass of each material required per batch if the fine aggregate contains 4.0 % excess water.
What will the W / C ratio be ?