Research of recycled mortars behaviour towards impact noise

Abstract

Currently there is a wide range of systems and materials that are used as impact noise absorbers, offering good performance avoiding the transmission of vibration through the forgings. In this research, four centimeters thick sheets of mortar were fabricated using four types of different aggregates combined with different typologies of insulation. Taking advantage of the minor density of mortars elaborated with recycled aggregates, it was proposed to substitute 100% of natural aggregates with recycled aggregates in order to fabricate mortars used in floating slab systems, as they offer more efficient solution from the acoustic point of view. The mortars elaborated with ceramic and mixed recycled aggregate presents the best solution to mitigate impacts produced on the surface reducing up to 20% of speed of impact transmission compared to mortars elaborated with natural aggregates.