Design an M30 mix to IS 10262:2019 for severe exposure, with OPC 53 cement, 20 mm angular aggregate, 100 mm slump and a water-reducing admixture.

1. 1Select the IS 10262:2019 code tab at the top.
2. 2In Target & Exposure, set Target Grade (MPa) to M30 and Exposure Class to Severe. Leave Standard Deviation blank so the code default applies.
3. 3Open Materials. Set cement Type to OPC 53 Grade, fine aggregate Zone to Zone II (Medium), coarse aggregate Max Size (mm) to 20 mm and Shape to Angular.
4. 4Open Workability and set Slump (mm) to 100 mm.
5. 5Tick Use Chemical Admixture and keep Dosage (% cement) at 1.0 and Water Reduction (%) at 15.
6. 6Select Design Mix.