Open AccessAcoustic behavior of porous concrete. Characterization by experimental and inversion methods
Author(s) -
Marco Pereira,
J. Carbajo,
L. Godinho,
Paulo Amado-Mendes,
Diogo Mateus,
J. Ramis
Publication year - 2019
Publication title -
materiales de construcción
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.539
H-Index - 30
eISSN - 1988-3226
pISSN - 0465-2746
DOI - 10.3989/mc.2019.03619
Subject(s) - materials science , porous medium , porosity , pervious concrete , acoustic impedance , attenuation coefficient , tortuosity , noise reduction coefficient , aggregate (composite) , characterization (materials science) , electrical impedance , composite material , noise control , inversion (geology) , mechanics , geotechnical engineering , cement , acoustics , noise reduction , geology , optics , engineering , physics , nanotechnology , electrical engineering , paleontology , structural basin
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.