Sound insulation performances of the wall profiles using autoclaved lightweight concrete block

Abstract

This study aimed to predict the sound insulation performance of wall profiles made of autoclaved lightweight concrete (ALC) blocks using computer simulations. The single wall structures made of ALC were evaluated based on variations in density and thickness, with densities ranging from 0.3 g/cm³ to 1.2 g/cm³ and thicknesses from 20 mm to 350 mm. The results showed that there was a reduction in sound insulation performance between 200 Hz and 400 Hz due to the coincident effects of ALC materials. Although increasing density and thickness could have improved sound insulation, the overall performance did not meet legal standards. The study then explored the effect of composite structures, which incorporated reinforcing materials in the ALC blocks, and found that the sound insulation performance was improved by up to 5 dB compared to single structures. The predicted results were verified through laboratory testing and measurement of the composite structures made of ALC.