1. Effects of microstructure on acoustical insulation of gypsum boards
- Author
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Yassine Elkhessaimi, Nicolas Tessier-Doyen, A. Smith, Axe 1 : procédés céramiques (SPCTS-AXE1), Science des Procédés Céramiques et de Traitements de Surface (SPCTS), Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM), IRCER - Axe 1 : procédés céramiques (IRCER-AXE1), Institut de Recherche sur les CERamiques (IRCER), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Groupe d'Etudes des Matériaux Hétérogènes (GEMH), Université de Limoges (UNILIM)-Institut des Procédés Appliqués aux Matériaux (IPAM), and Université de Limoges (UNILIM)-Université de Limoges (UNILIM)
- Subjects
Materials science ,Gypsum ,Sound transmission class ,Loss factor ,0211 other engineering and technologies ,Modulus ,Glass wool ,02 engineering and technology ,Sandwich panel ,engineering.material ,[SPI.MAT]Engineering Sciences [physics]/Materials ,021105 building & construction ,Architecture ,Composite material ,Safety, Risk, Reliability and Quality ,ComputingMilieux_MISCELLANEOUS ,Civil and Structural Engineering ,[PHYS]Physics [physics] ,Building and Construction ,[CHIM.MATE]Chemical Sciences/Material chemistry ,021001 nanoscience & nanotechnology ,Microstructure ,[PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph] ,Core (optical fiber) ,Mechanics of Materials ,engineering ,0210 nano-technology - Abstract
This paper focusses on the understanding of microstructural effects related to sound transmission loss and critical frequency of gypsum boards. The determination of the critical frequency, through measurements of the mass per unit area, thickness and Young's modulus, indicates that a microstructure exhibiting large gypsum crystals with prismatic shapes obtained by addition of citric acid, yields a value (for example: ≅ 3700 ± 360 Hz for 1.5 mass% of citric acid additive, board thickness: 14 mm) well beyond the sensitive frequency range of human hearing (350–1500 Hz). Concerning the sound transmission loss, acoustic insulation can be significantly improved by both increasing (i) the mass per unit area of the gypsum board, (ii) the thickness and (iii) the loss factor. A sandwich panel consisting of an assembly of two individual gypsum boards prepared with citric acid combined with a glass wool core of 50 mm in thickness shows very promising insulating performances. This result has been predicted theoretically with a transfer matrix method.
- Published
- 2017