A proposal for a lightened slab composed of fiber reinforced cementitious composite precast elements

In the design of civil structures, the reduction of floor masses represents one of the most foundamental optimization strategies. In the last years, thanks to the spreading of new building materials characterized by remarkable mechanical performance, new innovative solutions were developed, in particular with reference to precast structures. In this paper, a proposal for a semi- precast lightweight slab system is presented, with reference to a research project held at Politecnico di Milano with the financial support of Mangiavacchi Pedercini Spa. This technological solution is composed of high-performance fiber-reinforced concrete beams (HPFRCC) combined with textile reinforced concrete (TRC) disposable formworks and a cast-in-place steel fiber-reinforced concrete (SFRC) finishing layer. The advantages of such technology are proved by the experimental and numerical results present- ed in the following.