| 2.1. In batching plant mixer / never add fibres as first component in the mixer / fibres can be introduced together with sand and aggregates, or can be added in freshly mixed concrete 2.2. Truckmixer / run mixer at drum speed: 12-18 rpm / adjust slump to a min. of 12 cm (preferably with water reducing agents or high water reducing agents) / add fibres with maximum speed of 60 kg/min / optional equipment: belt-hoist elevator / after adding the fibres, continue mixing at highest speed for 4-5 min. (± 70 rotations) 2.3. Automatic dosing / Fibres can be dosed from bulk at rates from 0 up to 3,5 kg/sec with a specially developed dosing equipment |