Experimental characterisation of absorbing materials made from renewables
* Presenting author
The amount of ecological implications caused by the whole building process is gaining more and more attention. One measure to reduce ecological implications may be the use of building material made from renewables. To investigate this possibility, a joint research project is under way in Germany, which is focused on insulating material made from renewables. Besides fire protection, heat insulation, moisture proofing, emissions and sustainability assessment, also sound insulation is investigated. PTB contributes to this project by experimentally characterising insulating materials made from renewables. For this, existing measurement methods have been reviewed and adapted to the special needs of the project. The contribution is focused on the measurement of airflow resistivity by the alternating flow method and measurements in a transmission tube. Special attention is given to the influence of the material orientation and to the uncertainty of the measurement results.