Conference_programme: 17: Building acoustics
Lecture: Application of ETPU to floor resillient materials for reducing floor impact noises
Author(s): Kim Yong Hee, Song Guk Gon, Bae Seok Kyeong
Summary:
In South Korea, all new multi-stories apartment buildings should be designed to prevent floor impact noises. Therefore, use of floor resilient materials such as EPS or EVA with a dynamic stiffness of 40 MN/m3 or less is almost mandatory. The current EPS or EVA materials can be economical solution with a thickness of 30 mm or more. However, as for renovation purpose with remaining the existing concrete structure, it needs to be designed as thinner materials. ETPU (expanded thermoplastic poly- urethane) is a new material as elastic as a rubber but lighter weight. Dynamic stiffness and thickness of ETPU were controlled, respectively, as 5 MN/m3 to 20 MN/m3, and 10 mm to 40 mm. Based on laboratory test of basic properties in accordance with KS F 2868, mock-up test with loading plate to simulate floating floor structure was carried out in comparison with the existing EPS or EVA materials. As results, ETPU showed better performance on reducing heavy-weight floor impact noises, especially for rubber ball as an impact source. In addition, combination strategy of ETPU and other materials was discussed to fulfill thermal insulation performance, economical and working efficiency.
Corresponding author
Name: Dr Yong Hee Kim
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Country: N/A
