ABSTRACT
ABSTRACT: The total replacement of traditional rebars is now completely routine for 15 year in applications such as industrial and commercial suspended slabs resting on pile grids, which can span from 3 m to 5 m each way, with span to depth ratios from 15 to 20. Seven millions of square meter have been completed so far. More recently, the structural use of steel fibre-only reinforcement at high dosage rate has been developed as the sole method of reinforcement for fully elevated suspended slabs spanning from 5 m to 8 m each way, with a span to depth ratio of 30. More than forty buildings are now completed. The SFR concrete mix is also fully pumpable and doesn’t need any poker vibrating. Significant time and cost savings are then achieved. Design methods are derived from round slabs flexion testing and from full scale testing results of real elevated suspended slabs. Three full scale testing slabs have been built in order to monitor deflections, punching and cracking when they are loaded up to final rupture. This article summarizes the design methods and compares them to the provisions of the most recently available steel fibre reinforced concrete standards.
