Development of sound-absorbing pervious concrete for interior applications

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F24%3A00372238" target="_blank" >RIV/68407700:21110/24:00372238 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.jobe.2024.108697" target="_blank" >https://doi.org/10.1016/j.jobe.2024.108697</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jobe.2024.108697" target="_blank" >10.1016/j.jobe.2024.108697</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Development of sound-absorbing pervious concrete for interior applications

Popis výsledku v původním jazyce

This study focuses on the development of sound-absorbing pervious concrete, aiming to find the most advantageous composition for manufacturing interior sound-absorbing cladding panels. 29 compositions were manufactured to analyse the impact of aggregate gradation and type, cement amount, water-cement ratio, and incorporation of silica fume, superplasticizer, and polypropylene fibres on the sound absorption coefficient. Different aggregate sizes and their combinations within the range 0-8 mm were examined, mostly for mixed construction aggregate and silica sand; however, the impact of pumice, lightweight clay aggregate (Liapor/ceramsite) and recycled concrete aggregate was also studied. The cement amount used in the samples varied between 200 and 400 kg/m3, the water-cement ratio between 0.22 and 0.4, the silica fume substitution between 5 and 15 wt% of cement, and the superplasticizer share between 0.5 and 1.5 wt% of cement. Bulk density, flexural strength, compressive strength, and sound absorption coefficient were measured. The sound absorption coefficient was examined for 20 mm thick samples in two impedance tubes using the transfer function method; the monitored frequency range was 100-4000 Hz. For each sample, its noise reduction coefficient (NRC) and weighted sound absorption coefficient αw were calculated. The best acoustic results in this study were measured for samples containing pumice aggregate 3-7 mm, reaching NRC equal to 0.7 and αw to 0.55. However, the most advantageous samples satisfying the minimum set mechanical requirements while keeping promising sound absorption were those containing mixed construction aggregate of size 4-8 mm, W/C equal to 0.22, and with the addition of superplasticizer and silica fume.

Název v anglickém jazyce

Development of sound-absorbing pervious concrete for interior applications

Popis výsledku anglicky

This study focuses on the development of sound-absorbing pervious concrete, aiming to find the most advantageous composition for manufacturing interior sound-absorbing cladding panels. 29 compositions were manufactured to analyse the impact of aggregate gradation and type, cement amount, water-cement ratio, and incorporation of silica fume, superplasticizer, and polypropylene fibres on the sound absorption coefficient. Different aggregate sizes and their combinations within the range 0-8 mm were examined, mostly for mixed construction aggregate and silica sand; however, the impact of pumice, lightweight clay aggregate (Liapor/ceramsite) and recycled concrete aggregate was also studied. The cement amount used in the samples varied between 200 and 400 kg/m3, the water-cement ratio between 0.22 and 0.4, the silica fume substitution between 5 and 15 wt% of cement, and the superplasticizer share between 0.5 and 1.5 wt% of cement. Bulk density, flexural strength, compressive strength, and sound absorption coefficient were measured. The sound absorption coefficient was examined for 20 mm thick samples in two impedance tubes using the transfer function method; the monitored frequency range was 100-4000 Hz. For each sample, its noise reduction coefficient (NRC) and weighted sound absorption coefficient αw were calculated. The best acoustic results in this study were measured for samples containing pumice aggregate 3-7 mm, reaching NRC equal to 0.7 and αw to 0.55. However, the most advantageous samples satisfying the minimum set mechanical requirements while keeping promising sound absorption were those containing mixed construction aggregate of size 4-8 mm, W/C equal to 0.22, and with the addition of superplasticizer and silica fume.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA22-04828S" target="_blank" >GA22-04828S: Nový směr k udržitelným stavebním materiálům prostřednictvím pokročilých povrchových úprav na bázi lithných silikátů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Building Engineering

ISSN

2352-7102

e-ISSN

2352-7102

Svazek periodika

85

Číslo periodika v rámci svazku

108697

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

19

Strana od-do

—

Kód UT WoS článku

001185832500001

EID výsledku v databázi Scopus

2-s2.0-85184516521