Fire behavior of sandwich panels for roofing applications

Cement-based multilayered panels represent a promising and cost-effective solution for the roofing of modern prefabricated buildings. Due to the spread of such technologies, it is deemed necessary to evaluate the structural performances also with reference to the fire scenario. In the framework of a research project financed by national and regional authorities, Politecnico di Milano coordinated a wide experimental campaign aimed at assessing the mechanical behavior of innovative composite elements (2.5 m wide, 5 m long). The paper presents the results pertaining to the full-scale test of a prototype at high temperatures - mainly focusing on Temperature-Time and Displacement-Time diagrams - and provides a fire resistance classification compatible with the observed failure mode.