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.
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