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

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Title: Acoustic behavior of porous concrete. Characterization by experimental and inversion methods
Other Titles: Comportamiento acústico del hormigón poroso. Caracterización mediante métodos experimentales e inversos
Authors: Pereira, Matheus | Carbajo, Jesús | Godinho, Luís | Amado-Mendes, Paulo | Mateus, Diogo | Ramis-Soriano, Jaime
Research Group/s: Acústica Aplicada
Center, Department or Service: Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal
Keywords: Concrete | Aggregate | Mixture proportion | Characterization | Modelization | Hormigón | Agregado | Proporción de Mezcla | Caracterización Acústica | Modelización Acústica
Knowledge Area: Física Aplicada
Issue Date: 7-Oct-2019
Publisher: Instituto de Ciencias de la Construcción Eduardo Torroja
Citation: Materiales de Construcción. 2019, 69(336): e202. doi:10.3989/mc.2019.03619
Abstract: 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. | El uso de soluciones basadas en hormigón poroso con agregados ligeros se ha vuelto cada vez más común en el ámbito del control de ruido debido a su versatilidad en aplicaciones exteriores e interiores. En este trabajo, se han preparado muestras de hormigón poroso con agregados de arcilla expandida, para estudiar la influencia del tamaño de grano, el espesor y la relación agua / agregado / cemento en la absorción de sonido. Se han utilizado técnicas experimentales para obtener la impedancia superficial y el coeficiente de absorción de sonido. Además de las caracterizaciones experimentales, se ha aplicado un método inverso (basado en un algoritmo genético) para obtener los parámetros macroscópicos capaces de representar los materiales estudiados a través del modelo teórico de Horoshenkov-Swift. Mediante el modelo teórico de Horoshenkhov-Swift, es posible representar estos materiales en modelos numéricos como fluidos equivalentes.
Sponsor: This work was developed within the scope of the POCI-01-0247-FEDER-033990 (iNBRail) Project, funded by FEDER funds through COMPETE 2020, Portugal 2020. This work was also supported by FEDER funds through the Competitivity Factors Operational Programme - COMPETE and by national funds through FCT – Foundation for Science and Technology within the scope of the project POCI-01-0145-FEDER-007633 and through the Regional Operational Programme CENTRO2020 within the scope of the project CENTRO-01-0145-FEDER-000006. The support of COST (European Cooperation in Science and Technology) through the COST Action CA15125 – DENORMS: “Designs for Noise Reducing Materials and Structures” is here also acknowledged.
URI: http://hdl.handle.net/10045/97410
ISSN: 0465-2746 | 1988-3226 (Internet)
DOI: 10.3989/mc.2019.03619
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2019 CSIC. This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License.
Peer Review: si
Publisher version: https://doi.org/10.3989/mc.2019.03619
Appears in Collections:INV - Acústica Aplicada - Artículos de Revistas

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