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Porous sound-absorbing materials prepared from fly ash

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Abstract

The use of modified fly ash for preparing porous sound-absorbing materials and the optimum conditions of fly ash modification were studied. The effects of sintering temperature, sintering time, forming pressure, and other experimental conditions on porous sound-absorbing materials were also investigated. Results showed that the average volume density of the finished product was 0.93 g/cm3, the compressive strength was approximately 1.2 MPa, and the average porosity was nearly 60%. The average sound absorption coefficient of the sample in a low-frequency band was approximately 0.353, and the overall average sound absorption coefficient was nearly 0.458. The optimal preparation conditions were as follows: sintering temperature was 1100 °C, sintering time was 5 h, and molding pressure was 2 MPa.

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Funding

This work was supported by the National Natural Science Foundation of China (Grant No. 21376072) and the Fundamental Research Funds for the Central Universities (Grant No.2017MS140).

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Authors and Affiliations

  1. Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control, Department of Environmental Science and Engineering, North China Electric Power University, Baoding, 071003, People’s Republic of China

    Liqiang Qi, Jun Xu & Kunyang Liu

  2. MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, People’s Republic of China

    Liqiang Qi

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  1. Liqiang Qi
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  2. Jun Xu
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  3. Kunyang Liu
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Correspondence to Liqiang Qi.

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Responsible editor: Philippe Garrigues

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Qi, L., Xu, J. & Liu, K. Porous sound-absorbing materials prepared from fly ash. Environ Sci Pollut Res 26, 22264–22272 (2019). https://doi.org/10.1007/s11356-019-05573-5

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  • DOI: https://doi.org/10.1007/s11356-019-05573-5

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