More Than Just Concrete: Acoustically Efficient Porous Concrete with Different Aggregate Shape and Gradation

The interest in the use of resistant acoustic materials has put further attention on porous concrete building industry. This work investigates properties four different mix designs obtained with two types aggregates, that is, normal weight and lightweight aggregates. assessment sound-absorbing performances been conducted small-scale reverberation room (SSRR) at Politecnico di Torino (Italy), agreement procedure indicated ISO 354 Standard. For each type, three panel thicknesses, i.e., 20 mm, 40 60 were tested. Moreover, mounting conditions investigated, considering combination single panels multiple layers, adding an air gap between backing, inserting a layer rock wool itself. results show weighted absorption coefficients (αw) range 0.30 to 0.75 depending thickness conditions. These encouraging values make these useful for efficient practical applications indoor outdoor environments.