TOWARDS A BETTER UNDERSTANDING AND KNOWLEDGE OF BIOBASED MATERIALS THROUGH A NEW ACOUSTIC DATABASE

Author(s): P. Glé, T. Blinet, C. Guigou-Carter, T. Falwisanner, E. Kadri, F. Bou-Cherifi
Paper category: Proceedings
Book title: 3rd International Conference on Bio-Based Building Materials ICBBM 2019
Editor(s): Mohammed Sonebi and Sofiane Amziane
ISBN:
e-ISBN: 978-2-35158-229-9
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 357 - 364
Total Pages: 8
Language : English

Abstract: In this work, the acoustical performances of building elements including natural sustainable fibrous
and granular materials have been evaluated to create a new database. These characterisations
have been carried out at two scales. On the one hand, the physical parameters of the considered
biobased materials have been characterised in Cerema laboratory at the material scale; the sound
absorption and transmission loss were mainly obtained in normal incidence from Kundt tube
measurements, following the three microphones method. On the other hand, measurements have
been performed in CSTB facilities in diffuse field conditions to characterise the acoustical
performances (sound absorption, airborne sound insulation) of larger scale elements.
The parameters evaluated at the material scale have then been injected into a prediction software
in order to predict the acoustic performance of the building elements. In the present case, the
CSTB software AcouSYS based on a transfer matrix approach and integrating a spatial filtering
method to take into account the finite size of building systems and a coupling with a SEA approach
to take into account structural paths, has been mainly used.
Several types of biobased materials have been considered, including wood, cotton and hemp
wools, but also hemp concretes and cellulose wadding. The acoustic performance of building
elements including biobased fibrous materials are compared to similar ones including more
standardly used material such as mineral wool.

Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00