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Sound Insulation Performance of Foam Rubber Damping Pad and Polyurethane Foam Board in Floating Floors

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Abstract

Elastic materials can be used to improve the impact sound insulation performance of the floating floor. In this study, the foam rubber damping pad and polyurethane foam board were used to improve the sound insulation performance in floating floors; the main performance parameters such as thickness, dynamic stiffness, resonance frequency and damping ratio of the foam rubber damping pad and the polyurethane foam board were tested and analyzed under different loading systems. Besides, a reinforced concrete residential compartment was used as experimental background, the foam rubber damping pad and polyurethane foam board were used as elastic damping materials to form the different structures of floating floors with different thicknesses; then the impact sound pressure level and its variation rule were tested under different conditions, and the influence of the reduction of impact sound pressure level on the floating floor was compared and analyzed. The results show that before the pavement, the thickness of the polyurethane foam board is 2 times the thickness of the foam rubber damping pad in the natural state; After pavement, under the action of the load, the thickness of the polyurethane foam board is 1.39–1.42 times that of the foam rubber damping pad. The sound insulation and damping performance of the polyurethane foam board are lower than that of the foam rubber damping pad. When the thickness of the floating plate is increased from 32 to 80 mm, the sound insulation performance of the floating floor structure made of polyurethane foam board and foam rubber damping pad has a deterioration tendency. This study provides a basic reference for the sound insulation of floating floors with the foam rubber damping pad or polyurethane foam board as the elastic damping cushion.

Highlights

  1. 1.

    Under load, the cumulative thickness of polyurethane foam plate reached about 35% of its total thickness at 2 days. After 8–10 days, it tended to be stable, with a total deformation of about 45%.

  2. 2.

    For the floating building sound insulation floor system made of foam rubber damping pad, the frequency varies from 69.8–145.3 Hz, the reduction of impact sound pressure level is 18.7–23.6 dB, the change of frequency is 51%, and the reduction range of impact sound pressure level is 27%;

  3. 3.

    The floating floor of polyurethane foam board has a frequency change of 137.7–254.8 Hz, the reduction of impact sound pressure level is 11.1–17.3 dB, the frequency change is 46%, and the reduction range of impact sound insulation is 35%.

  4. 4.

    The thickness of the polyurethane foam board is about 1 times the thickness of the foam rubber damping pad, but its sound insulation and vibration absorption performance is low. It can be seen that the insulation board used as sound insulation board, its sound insulation and vibration reduction performance can not achieve the expected effect.

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Acknowledgements

The work is supported by the following fund projects: Major natural science research projects of colleges and universities of Jiangsu province (key technology of heat preservation and sound insulation for ultra-low energy green buildings, Project Number: 17KJA560002); Excellent scientific and technological innovation team of Jiangsu Province (Technology of heat preservation and sound insulation for green buildings); Key research and development projects of Xuzhou City (Research on key technology of noise pollution prevention and sound insulation for green buildings, Project Number: KC18135).

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  1. Jiangsu Vocational Institute of Architectural Technology, Xuzhou, 221116, Jiangsu, China

    J. Wang & B. Du

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Wang, J., Du, B. Sound Insulation Performance of Foam Rubber Damping Pad and Polyurethane Foam Board in Floating Floors. Exp Tech 47, 839–850 (2023). https://doi.org/10.1007/s40799-022-00579-0

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