Acoustic behavior of porous concrete. Characterization by experimental and inversion methods

The use of porous concrete solutions with lightweight aggregates has become increasingly common in noise control due to their versatility in exterior and interior applications. In this work, samples of porous consolidated concrete with aggregates of expanded clay were produced, in order to study the...

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Bibliographic Details
Published in:Materiales de construcción (Madrid) Vol. 69; no. 336; pp. 202 - e202
Main Authors: Pereira, M., Carbajo, J., Godinho, L., Amado-Mendes, P., Mateus, D., Ramis, J.
Format: Journal Article
Language:English
Published: Madrid Consejo Superior de Investigaciones Científicas 2019
Subjects:
Absorptivity
Acoustic noise
Acoustics
aggregate
Aggregates
Cement
characterization
Computational fluid dynamics
Concrete
Experimental methods
Genetic algorithms
Grain size
Granular materials
Inverse method
Microphones
mixture proportion
modelization
Noise control
Numerical models
Pore size
Porous materials
Research methodology
Sound
Sound transmission
Standard deviation
Characterization
Mixture proportion
Agregado
Hormigón
Proporción de Mezcla
Concrete
Modelization
Aggregate
Modelización Acústica
Caracterización Acústica
ISSN:0465-2746, 1988-3226
Online Access:Get full text
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Summary:The use of porous concrete solutions with lightweight aggregates has become increasingly common in noise control due to their versatility in exterior and interior applications. In this work, samples of porous consolidated concrete with aggregates of expanded clay were produced, in order to study the influence of the grain size, thickness and water/aggregate/cement ratio on the sound absorption. Experimental techniques were used to obtain the surface impedance and sound absorption coefficient. In addition to experimental characterizations, an inverse method was used (based on a genetic algorithm) to obtain the macroscopic parameters capable of representing the materials studied through the theoretical model of Horoshenkov-Swift. Using the theoretical Horoshenkhov-Swift model it becomes possible to represent these materials in numerical models as equivalent fluids.
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ISSN:0465-2746
1988-3226
DOI:10.3989/mc.2019.03619