A Properties of Physical and Floor Impact Sound of Damping Material Using Mineral Binder

Abstract

About 45% or more of our domestic households are residing in a multi-dwelling house such as an apartment house whose structure can be easily exposed to noises through walls and floors because it shares those walls and floors with neighboring, upper and lower households. The installation of damping materials between a concrete slab and a form concrete layer was led to the disappearance of considerable impact noises by those materials to reduce floor impact noises in multi-dwelling houses. These products generate a floating structure due to heterogeneous material layers and cause problems such as resonance and amplification of certain frequencies. Accordingly, this study manufactured mineral damping materials using mineral binders and applied the manufactured mineral damping materials to a floor structure, depending on physical properties such as density, dynamic stiffness and remanent strain among others, in a bid to analyze the characteristics of heavyweight impact noises and evaluate the reduction effects of floor impact noises. As a result of our experiments, remanent strain appeared inversely proportional to both density and strength development ratio, great noise reduction was shown from materials with high density and strength of heavyweight impact noises and low remanent strain, and the correlation of dynamic stiffness with impact sound reduction was considered low.