Global warming has emerged as a prominent concern in recent decades, prompting a reassessment of our resource utilization practices. There is a growing inclination to transition from a linear approach to a more circular and sustainable management of our waste, particularly focusing on reusing materials. Among these, organic waste from plants stands out as an economical and easily reusable resource, for instance it can be used to create new materials with enhanced thermal and acoustical properties, ideal for retrofitting buildings. This paper evaluates the efficacy of a novel bio-based residue regarding its sound transmission and absorption coefficients. Granulated porous samples varying in granulometry and density, were developed and tested under impedance tube methods. Moreover, some physical macroscopical parameters crucial in analytical models, such as flow resistivity, were measured. Parameters like tortuosity and porosity were derived from inverse methods employing different analytical models (e.g. Johnson-Champoux-Allard, among others), to test their accuracy. Results have exposed promising absorption properties compared with conventional porous materials, denoting a resonant behaviour with perfect absorption at the resonance frequency. The analytical models have shown a good predictive capability for certain macroscopical parameters, suggesting potential effectiveness in designing multilayer partitions. The envisioned applications are oriented to the sustainable retrofitting of buildings using the next generation of eco-friendly materials.
EXPLORING BIO-RECYCLED RESIDUES: INNOVATING SUSTAINABLE BUILDING MATERIALS FOR ACOUSTIC RETROFITTING
Garcia J. J.
;Piana E. A.
2024-01-01
Abstract
Global warming has emerged as a prominent concern in recent decades, prompting a reassessment of our resource utilization practices. There is a growing inclination to transition from a linear approach to a more circular and sustainable management of our waste, particularly focusing on reusing materials. Among these, organic waste from plants stands out as an economical and easily reusable resource, for instance it can be used to create new materials with enhanced thermal and acoustical properties, ideal for retrofitting buildings. This paper evaluates the efficacy of a novel bio-based residue regarding its sound transmission and absorption coefficients. Granulated porous samples varying in granulometry and density, were developed and tested under impedance tube methods. Moreover, some physical macroscopical parameters crucial in analytical models, such as flow resistivity, were measured. Parameters like tortuosity and porosity were derived from inverse methods employing different analytical models (e.g. Johnson-Champoux-Allard, among others), to test their accuracy. Results have exposed promising absorption properties compared with conventional porous materials, denoting a resonant behaviour with perfect absorption at the resonance frequency. The analytical models have shown a good predictive capability for certain macroscopical parameters, suggesting potential effectiveness in designing multilayer partitions. The envisioned applications are oriented to the sustainable retrofitting of buildings using the next generation of eco-friendly materials.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
