Influence of Loading Time of a Load Plate and Sample Size on the Measurement of Physical Properties of Resilient Materials
Abstract
This study investigates several factors that have not been specified in the standard for dynamic stiffness, compressibility, and long-term deformation; these factors can be used to evaluate the acoustic and physical performances of resilient materials. The study is intended to provide basic data for deriving the factors that need to be additionally reviewed through the standards. Since magnitude of dynamic stiffness changes with an increase in loading time, it is necessary to examine the setting of the loading time for a load plate under test conditions. Samples of size 300×300 mm, rather than 200×200 mm, yielded more reliable results for compressibility measurement. Since the test to infer long-term deformation of resilient materials after a period of 10 years in some samples showed variation characteristics different from those specified in the standards, it is recommended that the test method should be reviewed through ongoing research.Keywords:
resilient materials, dynamic stiffness, compressibility, long-term deformation.References
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2. Kim, K. W., Jeong, G. C., Yang, K. S., Sohn, J. Y. (2009), Correlation between dynamic stiffness of resilient materials and heavyweight impact sound reduction level, Building and Environment, 44, 1589-1600.
3. Baron, N., Bonfiglio, P., Fausti, P. (2004), Dynamic stiffness of materials used for reduction in impact noise: comparison between different in measurement techniques, Acoustica, paper ID: 066/1-8.
4. ISO 9052-1, (1989), Acoustics-determination of dynamic stiffness – part 1: materials used under floating floors in dwellings.
5. Kim, K. W., Choi, H. j., Yang, K. S., Sohn, J. Y. (2008), A Study on the Change in Dynamic Stiffness of Resilient Materials according to the Load Duration, Proceedings of The First International Conference on Building Energy and Environment.
6. Schiavi, A., Guglielmone, C., Miglietta, P. (2011), Effect and importance of static-load on airflow resistivity determination and its consequences on dynamic stiffness, Applied Acoustics, 72, 705-710.
7. ISO 29770, (2008), Thermal insulating products for building applications - Determination of thickness for floating-floor insulating products.
8. ISO 20392, (2007), Thermal-insulation materials - Determination of compressive creep.
9. Korean Standard, (2003), KS F 2868 Determination of dynamic stiffness of materials used under floating floors in dwellings.
10. Japanese Industrial Standard, (2000), JIS A 6321 Rock wool isolating material for floating floors.
11. Kim, H. G., Kim, M. J., Kim, B. K. (2005), Study on measurement the dynamic stiffness of materials used under floating floors in dwellings, Journal of the Architecture Institute of Korea, Planning & Design 21, 1, 229–234.
12. Lee, J. W., Jeong, G. C., Kwon, Y. P. (2003), Correlation between dynamic characteristics of isolation material and impact sound reduction of lightweight impact source, Proceedings of the KSNVE Annual Spring Conference, 191–195.
13. Schiavi, A., Pavoni Belli, A., Russo, F. (2005), Estimation of acoustical performance of floating floors from dynamic stiffness of resilient layers, Building Acoustics, 12, 2, 99-113.
14. Schiavi, A., Pavoni Belli, A., Russo, F. and Corallo, M. (2010), Dynamic stiffness of resilient materials:some consideration on the proposed revision of ISO 9052-1 standard, Proceedings of 20th International Congress on Acoustics.
15. DIN EN 12431, (2007), Thermal insulating products for building applications-Determination of thickness for floating floor insulating products.
16. Findley, W.N. (1994), Creep Characteristics of Plastics. Symposium on Plastics, American Society of Testing and Materials.
17. Schiavi, A., Pavoni Belli, A., Corallo, M. Russo, F. (2007), Acoustical performance characterization of resilient materials used under floating floors in dwellings, ActaAcustica United with Acustica 93, 477-485.
18. Kilhenny, B. (2008), Open and closed case -The difference between various mounting tapes-. FLEXO, Technologies & Techniques.
19. Bettarello, F., Caniato, M., Di Monte, R., Kaspar, J., Sbaizero, O. (2010), Preliminary acoustic tests on resilients materials: comparison between common layers and nanostructured layers. Proceedings of 20th International Congress on Acoustics.
