Very dry mixes having slump 0 - 25 mm are typically used in road making, low workability mixes having slump 10 - 40 mm are typically used for foundations with light reinforcement, medium workability mixes with slump 50 - 90 mm, are typically used for normal reinforced concrete placed with vibration, high workability concrete with slump > 100 mm is typically used where reinforcing has tight spacing, and/or the concrete has to flow a great distance.