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Sound absorption of porous cement composites: effects of the porosity and the pore size

Rutkevičius, Marius; Austin, Zak; Chalk, Benjamin; Mehl, Georg H.; Qin, Qin; Rubini, Philip A.; Stoyanov, Simeon D.; Paunov, Vesselin N.


Marius Rutkevičius

Zak Austin

Benjamin Chalk

Simeon D. Stoyanov

Vesselin N. Paunov


© 2015, Springer Science+Business Media New York. We prepared sound absorbing cement–hydrogel composites using a hydrogel slurry templating technique. We air-dried the wet cement composites containing a varying percentage and size of entrapped hydrogel microbeads to produce a porous cement with a controlled porosity and pore size matching the hydrogel bead distribution. The composites porosity, mass density, compressional strength and sound absorption properties were analysed. SEM analysis showed residual domains from the dried hydrogels beads within the voids created by the hydrogel bead evaporation in the cement samples. The sound absorption coefficient of the composite varied with the templated hydrogel bead size and the overall porosity. The composite samples made with hydrogel beads of average size 0.7 mm showed high absorption coefficients between 0.5 and 0.80 for 500–800 Hz for 50 vol% porosity. Samples produced by templating hydrogels of 1 mm bead size and 70 vol% porosity showed an increased absorption over the sound frequency range 200–2000 Hz. Templating a mixture of the 1.6 and 1.0 mm hydrogel beads slurries with cement slurry did not appear to yield synergistic effect in the sound absorption of the produced porous composites compared to samples made from the separate slurries. The mechanical strength of the obtained porous cement composites decreased with the increase of porosity. Such low fabrication-cost and environmentally friendly composites have a potential to be used as passive sound absorbers by the building and transport industries.


Rutkevičius, M., Austin, Z., Chalk, B., Mehl, G. H., Qin, Q., Rubini, P. A., …Paunov, V. N. (2015). Sound absorption of porous cement composites: effects of the porosity and the pore size. Journal of materials science, 50(9), 3495-3503.

Journal Article Type Article
Acceptance Date Feb 13, 2015
Online Publication Date Feb 21, 2015
Publication Date 2015-05
Deposit Date Jul 29, 2015
Publicly Available Date Nov 23, 2017
Journal Journal of materials science
Print ISSN 0022-2461
Electronic ISSN 1573-4803
Publisher Springer Verlag
Peer Reviewed Peer Reviewed
Volume 50
Issue 9
Pages 3495-3503
Keywords Porous cement composites; Sound absorption
Public URL
Publisher URL
Additional Information Author's accepted manuscript of article which has been published in: Journal of materials science, 2015, v.50, issue 9. The final publication is available at Springer via


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