The critical damping ratio measurement is to determine of ability to dissipate the energy of free vibrations in the tested samples under specific load condition (initial sample load 80N, external force frequency seep with amplitude o 1N) performed by dynamic stiffness test bench.
The tests are carried out by Dynamic stiffness test bench according to modified procedure of
EN 29052-1:2011 Acoustics - Determination of dynamic stiffness - Part 1: Materials used under floating floors in dwellings
The critical damping ratio measurement is to determine of ability to dissipate the energy of free vibrations in the tested samples under specific load condition (initial sample load 80N, external force frequency seep with amplitude o 1N) performed by dynamic stiffness test bench.
The tests are carried out by Dynamic stiffness test bench according to modified procedure of
EN 29052-1:2011 Acoustics - Determination of dynamic stiffness - Part 1: Materials used under floating floors in dwellings
The test method is based on determining the absorption of infrared radiation by presenting the result as a spectrum. In Fourier spectrometers, the spectra are obtained by examining the absorption for the radiation beam from the entire tested IR range. After this beam has passed through the sample, the beam from the same source has not been interfered with, and the spectrum is obtained using the Fourier transform of the recorded interference spectrum. Thus, we obtain the absorption (or transmission) signal as a function of wavelength (wavenumber expressed in cm-1).
The test method is based on determining the absorption of infrared radiation by presenting the result as a spectrum. In Fourier spectrometers, the spectra are obtained by examining the absorption for the radiation beam from the entire tested IR range. After this beam has passed through the sample, the beam from the same source has not been interfered with, and the spectrum is obtained using the Fourier transform of the recorded interference spectrum. Thus, we obtain the absorption (or transmission) signal as a function of wavelength (wavenumber expressed in cm-1).
The optical (digital) microscope (OM) observation is to determine the microstructure of the material. There are no standards in microscopic observations. The aim of the observation is to compare the microstructure of the observed material with the progress of the ageing process using different magnifications.
Tests are performed on samples in the solid state with dimensions of 40mm x 40mm x 3mm. In OM there are no dimensional restrictions. Optical (digital) microscope - Keyence VHX-7000 is used for the tests.
The optical (digital) microscope (OM) observation is to determine the microstructure of the material. There are no standards in microscopic observations. The aim of the observation is to compare the microstructure of the observed material with the progress of the ageing process using different magnifications.
Tests are performed on samples in the solid state with dimensions of 40mm x 40mm x 3mm. In OM there are no dimensional restrictions. Optical (digital) microscope - Keyence VHX-7000 is used for the tests.
The scanning electron microscope (SEM) observation is to determine the microstructure of the material and chemical analysis performed by EDS. The objective of the proposed testing procedure is to compare the results (images, chemical compositions) received at different times (for example before and after ageing).
The scanning electron microscope (SEM) observation is to determine the microstructure of the material and chemical analysis performed by EDS. The objective of the proposed testing procedure is to compare the results (images, chemical compositions) received at different times (for example before and after ageing).
The low temperature cracking measurement is to determine the resistance of tested element against low temperature cracking performed by measuring temperature and force and determining cryogenic stress.
The dynamic stiffness modulus measurement is to determine the relationship between maximum applied stress and maximum strain response performed by measuring the displacement of tested system. The test is conducted using MTS Landmark servohydraulic testing system of 100 kN, special grips for fixing the sample and RTSS videoextensometer in accordance with modified method:
EN 12697-26 Bituminous mixtures – Test methods – Part 26: Stiffness
As part of the testing of the PM&VL7 research line, Flex&Robust composites were examined.