How is Steel Fibre Reinforced Concrete (SFRC) batched?
SFRC comprises concrete and steel fibres. The basic concrete mix is defined in the same way as it is for ordinary reinforced concrete. SFRC requires a high quality concrete with a low water/cement ratio, low shrinkage properties and a good blend of quality aggregates. The particular type of steel fibre is chosen in order to achieve specific technical and load-carrying requirements of the SFRC-element. Concrete mix, fibre type and fibre dosage rate have to be harmonized in order to obtain the best possible solution. The steel fibres can be added either at the concrete batching plant or at a later stage on the job site. Fibre integration can be done manually or mechanically. At the batching plant, fibres are usually added directly into the stationary mixer or together with the coarse aggregates on the conveyor belt. On the job-site, the FE and HE fibres can be integrated into the concrete mixer truck, by using conveyor belts or elevators. For major or long lasting projects and for those
