ABSTRACT
The use of lightweight and/or recycled aggregates for concrete elements in industrial applications for Civil and Industrial Engineering is strongly increased in recent years. Starting from classical use of pumice and other lightweight aggregates, the industry production of expanded clay and perlite offers interesting mix design that can optimize structural and energy performances of cladded panels. The authors illustrate recent experiences of research projects on the recycling of stone aggregates from demolition of r.c. structures in which mechanical properties are compared with natural aggregates. Several mix designs based on expanded perlite are also investigated in terms of mechanical and thermal performances optimizing both aspects: they are especially dedicated to full unit masonry walls and to create insulating-reinforcing panels to be coupled with masonry walls. Finally, is referred an experimental investigation with a concrete mix design of recycled aggregates, coming from collapsed buildings in central Italian area hit by earthquake 2016.
