Thermal and acoustic performance of additive aerogel-clay bricks.

Abstract Aerogel is a nano-porous material with significant thermal insulation properties and good candidate for improving the performance of traditional materials energy efficiency in buildings. It therefore gaining more interest construction industry researchers are carrying out investigations incorporating granular aerogel into bricks. The aim present paper experimental investigation influence on both acoustic mixed clay-aerogel Samples 5% were tested compared pure clay. For each type brick, conductivity (λ) was evaluated Small Hot Box apparatus. (absorption coefficient α Transmission Loss TL) measured at normal incidence impedance tube. results reveal that clay sample initial mixture decrease to 0.212 W/(mK) 10°C, comparison 0.310 W/(mK). Also α-values better than ones without achieved (α = 0.29 about 1600 Hz instead 0.11) whereas TL values, despite (24 - 34 dB depending frequency), lower obtained samples, due density, according Mass Law.