Sintering-free preparation of porous ceramsite using low-temperature decomposing pore former and its sound-absorbing performance

Wu, Hao; Zhang, Teng; Pan, Ruiheng; Chun, Yeyang; Zhou, Hongmei; Zhu, Wanxu; Peng, Hanze; Zhang, Qing

doi:10.1016/j.conbuildmat.2018.03.152

Cited by 34 publications

(19 citation statements)

References 17 publications

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“…According to the theory of parallel capillary, two dimensionless physical parameters are introduced to calculate the sound energy loss in a single channel and the expression as shown in Equations (5)(6). 25,26 The Voronina model presented the empirical formula of the structural characteristic parameter (Q) based on the apparent porosity (H) and average pore size (D) of the material.…”

Section: Simulated Mechanism Modelmentioning

confidence: 99%

“…4 The use of effective porous sound-absorbing materials is a reasonable strategy for noise control engineering. [5][6][7] Traditionally, porous sound-absorbing materials can be divided into three categories based on chemical composition, that is, organic porous materials, metal porous materials, and inorganic porous materials. 8 Most organic porous materials are flammable, metal porous materials have a higher cost in application, and traditional inorganic porous materials are fragile and harmful to health; therefore, much recent effort has focused on investigation of new types of inorganic porous materials.…”

Section: Introductionmentioning

confidence: 99%

“…9 Current studies have focused on the preparation of porous sound-absorbing materials using nonmetallic minerals and industrial solid wastes, such as zeolite, fly ash, coal gangue, blast furnace slag, and steel slag. 5,8 In this study, we examined the use of another natural nonmetallic mineral, magmatic soil, and tuff. Magmatic soil is a mixture of weathered volcanic lava with sedimentary ash and tuff is consolidated pyroclastic or volcaniclastic rocks.…”

Section: Introductionmentioning

confidence: 99%

“…11,12 Therefore, the apparent porosity and pore size are key determinants of the sound-absorption properties of porous materials. 5 Numerous technologies have been developed to produce porous sound-absorbing ceramics, such as organic template impregnation, freezing casting, foaming, templating, and gelcasting methods. [13][14][15][16][17][18] Among them, gelcasting and the organic template impregnation methods are considered effective strategies to prepare high-efficiency sound-absorbing materials.…”

Section: Introductionmentioning

confidence: 99%

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Open‐cell porous sound‐absorbing ceramics prepared by a new procedure that combines foamed and templated methods

Tian

Tang

Wang

et al. 2020

Int J Applied Ceramic Tech

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Low-grade nonmetal ore, mainly magmatic soil and tuff, was used to prepare porous sound-absorbing ceramics. A new processing method that combines the foaming and templating methods was used to produce open-cell porous ceramics. Silicon carbide and carbon powders were used as the foaming agent and template agent, respectively, and their effects on open-cell preparation and sound-absorption properties were also investigated. The results showed that sound-absorption performance was closely related to the apparent porosity (H). Compared with either foaming or template methods, the new method incorporating both processes increased the sound-absorption coefficient (α) and H by 51%-258% and 69%-728%, respectively. Optimum sound absorption of the ceramics, that is, α = 0.68, noise reduction coefficient (NRC) = 0.48, and H = 50.22%, were obtained at foaming agent contents (FACs) of 1.5 wt% and template agent contents (TACs) of 4 wt%. The Delany-Bazley and Voronina models were selected to simulate the sound-absorption coefficients and the latter one fitted well with our experimental results. K E Y W O R D Scombined foamed and templated method, open cell, sound-absorption mechanism, sound-absorbing ceramics, voronina model

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Section: Simulated Mechanism Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Open‐cell porous sound‐absorbing ceramics prepared by a new procedure that combines foamed and templated methods

Tian

Tang

Wang

et al. 2020

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

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“…Therefore, various measures that can achieve noise abatement have been considered worldwide [1]. A sound barrier and/or track acoustic panel made of porous ceramsite, which is a kind of foaming cement-based aggregate, is quite suitable for sound absorption as both possess remarkable features, such as high sound absorption, fire-resistance, anti-seismic abilities, being weather-proof, anti-corrosiveness, a light weight, and non-toxicity [2,3]. Hence, they have been widely used to abate the noise pollution caused by URT in recent years [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Porous Ceramsite with Ammonium Acetate as Low-Temperature Decomposition Foaming Agent and Its Sound Absorption Performance

Huang

Pan

et al. 2019

Materials

Self Cite

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The sound absorption performance of porous ceramisite is determined by its pore structure, which is mainly governed by a foaming agent and heating rate during a foaming process. By tuning the heating rate and foaming agent concentration, ceramisite with different pore structures was prepared by using flyash, cement, quick lime, and plaster as raw materials as well as ammonium acetate as a low-temperature decomposition foaming agent in this work. The phase composition, microstructure, and sound absorption performance of the prepared porous ceramisite were investigated. Results demonstrate that the apparent porosity and the pore diameter increased with the increase of foaming agent concentration, accompanied with the broadening of the pore diameter distribution. The apparent porosity is positively correlated with heating rate until the temperature is higher than 20 °C·min−1, while the pore diameter is negatively correlated. The pore diameter distribution becomes narrow as a function of the heating rate. The sound absorption performance is positively correlated with the apparent porosity. An optimal pore diameter might exist, meaning diameter sizes that are larger or smaller than the optimal diameter are not conducive to the optimization of the sound absorption performance of the overall frequency band. It was determined that the curing time was not a key factor for optimizing the pore structure.

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Recent Advances in Preparation and Structure of Polyurethane Porous Materials for Sound Absorbing Application

Dong,

Duan,

Chen

et al. 2024

Macromol. Rapid Commun.

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Various acoustic materials have been developed to resolve noise pollution problem in many industries. Especially, materials with porous structure have been broadly used to absorb sound energy in civil construction and transportation area. Polyurethane (PU) porous materials possess excellent damping properties, good toughness and well‐developed pore structures, which have a broad application prospect in sound absorption field. This work aimed to summarize the recent progress of fabrication and structure for PU porous materials in sound absorption application. The sound absorption mechanisms of porous materials were introduced. Different kinds of structure for typical PU porous materials in sound absorption application were covered and highlighted, which included PU foam, modified PU porous materials, aerogel, templated PU and special PU porous materials. Finally, the development direction and existing problems of PU material in sound absorption application were briefly prospected. It can be expected that porous PU with high sound absorption coefficient can be obtained by using some facile methods. The design and accurate regulation of porous structures or construction of multilayer sound absorption structure will be favorably recommended to fulfill the high demand of industrial and commercial applications in the future work.This article is protected by copyright. All rights reserved

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Sintering-free preparation of porous ceramsite using low-temperature decomposing pore former and its sound-absorbing performance

Cited by 34 publications

References 17 publications

Open‐cell porous sound‐absorbing ceramics prepared by a new procedure that combines foamed and templated methods

Open‐cell porous sound‐absorbing ceramics prepared by a new procedure that combines foamed and templated methods

Preparation of Porous Ceramsite with Ammonium Acetate as Low-Temperature Decomposition Foaming Agent and Its Sound Absorption Performance

Recent Advances in Preparation and Structure of Polyurethane Porous Materials for Sound Absorbing Application

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