Development of Innovative Aerogel Based Plasters: Preliminary Thermal and Acoustic Performance Evaluation

By C. Buratti, E. Moretti, Elisa Belloni, F. Agosti. 2014

169 citations recorded by the source corpus.

The thermal and acoustic properties of innovative insulating systems used as building coatings were investigated: Granular silica aerogel was mixed with natural plaster in different percentages. This coating solution is transpiring and insulating, thanks to the use of a natural lime coat and aerogel, a highly porous light material with very low thermal conductivity. The thermal conductivity of the proposed solution was evaluated by means of a Heat Flow meter apparatus (EN ISO 12667), considering different percentages of aerogel. The natural plaster without aerogel has a thermal conductivity of about 0.50 W/m K; considering a percentage of granular aerogel of about 90% in volume, the thermal conductivity of the insulating natural coating falls to 0.050 W/m K. Increasing the percentage of granular aerogel, a value of about 0.018–0.020 W/m K can be reached. The acoustic properties were also evaluated in terms of the acoustic absorption coefficient, measured by means of a Kundt’s Tube (ISO 10534-2). Two samples composed by a plasterboard support, an insulation plaster with aerogel (thicknesses 10 mm and 30 mm respectively) and a final coat were assembled. The results showed that the absorption coefficient strongly depends on the final coat, so the aerogel-based plaster layer moderately influences the final value. The application of this innovative solution can be a useful tool for new buildings, but also for the refurbishment of existing ones. This material is in development: until now, the best value of the thermal conductivity obtained from manufacturers is about 0.015 W/m K.

Subfields: Spectroscopy

View Paper: https://www.semanticscholar.org/paper/f7bd504c207a8c8199720cf4a751646def0099be

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1. W. Hittini
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3. Muzamil A. Hassan
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Citations in the corpus

• Traditional, state-of-the-art and renewable thermal building insulation materials: An overview (2019, background): “In another study, Buratti et al. [109] investigated the thermal and acoustic properties of insulating systems made of granular silica aerogel mixed with natural plaster in different percentages as building coatings.”