Abstract
There have been frequent cases of civil complaints and disputes in relation to floor impact noises over the years. To solve these issues, a substantial amount of sound resilient material is installed between the concrete slab and the foamed concrete during construction. A new place-type resilient material is made from cement, silica powder, sodium sulfate, expanded-polystyrene, anhydrite, fly ash, and acrylic polymer emulsion resin. Its physical characteristics such as density, compressive strength, dynamic stiffness, and remanent strain are analyzed to assess the acoustic performance of the material. The experimental results showed the density and the dynamic stiffness of the proposed resilient material is increased with proportional to the use of cement and silica powder due to the high contents of the raw materials. The remanent strain, related to the serviceability of a structure, is found to be inversely proportional to the density and strength. The amount of reduction in the heavyweight impact noise is significant in a material with high density, high strength, and low remanent strain. Finally, specimen no. R4, having the reduction level of 3 dB for impact ball and 1 dB for bang machine in the single number quantity level, respectively, is the best product to obtain overall acoustic performance.
Highlights
The average annual rate of increase in multi-unit dwellings in South Korea was recorded at 5.6% and despite the decline in the percentage increase resulting from low national growth, their housing market share has steadily been on the rise
According to the revised standards, the standard floor system is to be excluded, and a floor impact noise performance rating certification institution is to check the performance of the insulation system and introduce a certified floor system to judge the conformity of the system in relation to the noise insulation performance
The increments at 160 Hz in Figure 17 were investigated and it could be explained duefabricated to the resonance of the material as mentioned before
Summary
The average annual rate of increase in multi-unit dwellings in South Korea was recorded at 5.6% and despite the decline in the percentage increase resulting from low national growth, their housing market share has steadily been on the rise. Those living in multi-unit dwellings, which are the most common type of housing in South Korea, are likely to be exposed to noise from dwelling as the walls, floors, and ceilings are shared by the vertically and horizontally adjacent housing units. It prescribes that a slab thickness of at least
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