Abstract:

This paper reviews the sound absorption properties of various modified concrete from the existing published works. Researchers have proposed several methods to treat the foam concrete to also capable of absorbing sound and thus improving the sound quality in a room. Concrete is usually employed as rigid wall in building and act as sound barrier in highway, roads etc, due to its high density. In this study, it was aimed to determine the density for autoclaved foam concrete for sound absorption performance of concrete. Water (0.60), cement (0.25) and aggregate (0.62) ratios were the foam concrete produced at a dry density of 300, 400, and 500 kg/m3. The concrete is made using the Portland cement, powdered quartz, hydrated lime and synthetic foaming agent. The compressive strengths increased in autoclaved foam concrete specimens and flexural strengths also increased but the thermal conductivity coefficients is decreased due to its increasing density. Autoclaving improved both the mechanical and thermal properties of foam concrete at a density of 300 kg/m3. From the review, it was concluded that the sound absorption of the concrete or cement-based material that can be improved by creating porous structures namely lightweight aggregate.

Keywords: Acoustic, sound, concrete, lightweight, density