More Than Just Concrete: Acoustically Efficient Porous Concrete with Different Aggregate Shape and Gradation
Source abstract
Abstract
The interest in the use of resistant acoustic materials has put further attention on the use of porous concrete in the building industry. This work investigates the acoustic properties of four different mix designs of porous concrete obtained with two types of aggregates, that is, normal weight and lightweight aggregates. The assessment of the sound-absorbing performances has been conducted in the small-scale reverberation room (SSRR) at Politecnico di Torino (Italy), in agreement with the procedure indicated in the ISO 354 Standard. For each concrete type, three panel thicknesses, i.e., 20 mm, 40 mm, and 60 mm, were tested. Moreover, different mounting conditions were investigated, considering the combination of single panels in multiple layers, adding an air gap between the panel and the backing, and inserting a layer of rock wool in the air gap itself. The results show weighted absorption coefficients (αw) in the range of 0.30 to 0.75 depending on the thickness and mounting conditions. These encouraging values make these materials useful for efficient practical applications in indoor and outdoor environments.
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Research context
OpenAlex topics: Acoustic Wave Phenomena Research · Urban Stormwater Management Solutions · Hygrothermal properties of building materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Energy (DENERG), Corso Duca degli Abruzzi 24, Politecnico di Torino, 10129 Torino, Italy
CEMEX Innovation Holding AG—Brügg Branch, Römerstrasse 13, 2555 Brügg, Switzerland
CEMEX Innovation Holding AG, General-Guisan-Strasse 6, 6300 Zug, Switzerland
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