Influence of the Microstructure in the Acoustical Performance of Consolidated Lightweight Granular Materials

Maderuelo-Sanz, Rubén; Nadal-Gisbert, A.; Amorós, José Enrique Crespo; Morillas, Juan Miguel Barrigón; Parrés, F.; Sanchís, Emilio

doi:10.1007/s40857-016-0048-5

Cited by 16 publications

(10 citation statements)

References 23 publications

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“…Serbet (sıkıştırılmamış) malzemenin yoğunluğu 85 ve 105 kg/m 3 arasında ve öz-gül ısısı 0,8 ve 1 kJ/kgK arasındadır [32]. Diğer granüllü malzemelerde olduğu gibi gözenekli ortamda iyi akustik performans doğru tane boylarını seçerek, doğru bağlayıcı yoğunluğunu ve kalınlıklarını kullanarak elde edilebilir [86]. Malzeme ekolojik olarak inorganiktir ve 20 yıl boyunca yapısı bozulmaz.…”

Section: Ağaç Lifleri (Wood Fibers)unclassified

“…Genleştirilmiş perlit ile yapılmış paneller yüksek yoğunluğa (150 -280 kg/m3) sahiptir ancak ısı yalıtım özellikleri aynıdır. İyi bir ses yutucu olarak ses yutma katsayısı hafif genişletil-miş kil agrega ve genişletilmiş vermikulit gibi diğer granüllü malzemelere benzerdir [86,90]. Yanmaz ve yangın halinde alev geçirmez, toksik değildir.…”

Section: Ağaç Lifleri (Wood Fibers)unclassified

“…Elde edilen ürün çok hafif, temiz, kokusuz ve sterildir [68]. Tuğla ve hafif betonlarda bağayıcı olmadan (tane boyutu 0,1-15 mm) veya bir bağlayıcı madde ile karıştırılarak kullanılabilir ve ısıl yalıtım performansı uzun bir süre için sabitdir [84,85,86]. Çoğu mineral malzeme gibi kemirgenler ve böcekler tarafından hasar görmez.…”

Section: Mantar (Cork)unclassified

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İnşaat Sektöründe Kullanılan Yalıtım Malzemelerinin Isı ve Ses Yalıtımı Açısından Değerlendirilmesi

Arslan¹,

Aktaş²

2018

Journal of Polytechnic

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Section: Ağaç Lifleri (Wood Fibers)unclassified

Section: Mantar (Cork)unclassified

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İnşaat Sektöründe Kullanılan Yalıtım Malzemelerinin Isı ve Ses Yalıtımı Açısından Değerlendirilmesi

Arslan¹,

Aktaş²

2018

Journal of Polytechnic

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“…The effect of binding resins or mixtures of different materials must be taken into account. 14,15 These non-acoustical properties play an important role in the acoustical performance of porous materials.…”

Section: Introductionmentioning

confidence: 99%

Prediction of sound absorption performance of fibers coming from cigarette butts using a phenomenological model

García-Cobos¹,

Maderuelo-Sanz²

2022

Journal of Industrial Textiles

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This work deals with experimental and theoretical research about cellulose acetate fibers coming from cigarette butts. This waste, considered one of the most hazardous, numerous, and polluting waste all over the world, represents a high environmental risk. The possibility of using these fibers in sound-absorbing panels is evaluated. The acoustical properties are measured according to ISO 10534-2, and predicted using a phenomenological model over the frequency range from 100 Hz to 6400 Hz. This work includes the study of important non-acoustical properties for a better understanding of the porous structure. The Johnson-Champoux-Allard model provides good accuracy. The experimental results of the sound absorption spectrums show mean errors ranging from 1.1% to 9.0%. Moreover, it is possible to obtain non-acoustic properties of cellulose acetate fibers, which are difficult to obtain experimentally, using the Johnson-Champoux-Allard model and an inverse technique. The input parameters of this model are successfully obtained with low errors concerning the measurements (0.6–5.2% for porosity or 2.6–10.5% for flow resistivity). The results of the sound absorption spectrum at normal incidence of the cellulose acetate show very accurate predictions. The experimental results show values of sound-absorption coefficients close to 1.0 and sound absorption average ranging from 0.42 to 0.8. Therefore, these waste fibers are an alternative to the traditional porous absorbers, mainly composed of synthetic fibers or foams and petroleum-based resins.

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“…In 2000, Magrini and Ricciardi (3) proposed the use of expanded clay in the production of porous concrete, and since then several studies with different applications have been performed. Actually, several studies have been carried out on the application of granular materials for sound absorption purposes (not only concrete-based ones), whether these materials are consolidated or not (4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19). The works by Vašina et al (2), Asdrubali and Horoshenkov (4) and Carbajo et al (9) are of particular relevance, revealing some expected values of the macroscopic parameters for materials based in expanded clay.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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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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Influence of the Microstructure in the Acoustical Performance of Consolidated Lightweight Granular Materials

Cited by 16 publications

References 23 publications

İnşaat Sektöründe Kullanılan Yalıtım Malzemelerinin Isı ve Ses Yalıtımı Açısından Değerlendirilmesi

İnşaat Sektöründe Kullanılan Yalıtım Malzemelerinin Isı ve Ses Yalıtımı Açısından Değerlendirilmesi

Prediction of sound absorption performance of fibers coming from cigarette butts using a phenomenological model

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

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