Determination of the anisotropic thermal conductivity of an aerogel-based plaster using transient plane source method
Paper i proceeding, 2021

Aerogel-based plasters are composite materials with declared thermal conductivities in the range of traditional insulating materials, i.e. 30-50 mW/(m K). Based on the results from reported field measurements, aerogel-based plasters can significantly reduce the thermal transmittance of uninsulated walls. However, the in-situ measured thermal conductivities have sometimes been higher than the declared values measured in laboratory and in the main direction of the heat flow. Meanwhile, the anisotropic thermal performance of aerogel-based plasters, i.e., deviating thermal performance in the different directions of heat flow, has not been explored yet.

The objective of this study is thus to evaluate the anisotropic thermal conductivity of an aerogel-based plaster. This is done in a set of laboratory measurements using the transient plane source method. Six identical and cubic samples with the dimensions of 10x10x10 cm3 were paired two and two, creating three identical sample sets. In total, 360 measurements of thermal conductivity and thermal diffusivity, and 130 measurements for specific heat capacity were conducted. The results indicate a weak anisotropy of less than 6.5 % between the three directions (x, y, z). Considering the accuracy of the selected measurement technique, better than 5 %, supplementary measurements using another technique are recommended.

aerogel

transient plane source method

thermal conductivity

anisotropic

plaster

render

Författare

Ali Naman Karim

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Bijan Adl-Zarrabi

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Pär Johansson

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Angela Sasic Kalagasidis

Chalmers, Arkitektur och samhällsbyggnadsteknik, Byggnadsteknologi

Journal of Physics: Conference Series

17426588 (ISSN) 17426596 (eISSN)

Vol. 2069 1 012030

8th International Building Physics Conference (IBPC 2021)
Köpenhamn, Denmark,

Superisolerande puts för renovering och nybyggnation

Energimyndigheten (2018-006152), 2019-01-01 -- 2021-12-31.

Drivkrafter

Hållbar utveckling

Ämneskategorier

Samhällsbyggnadsteknik

Byggproduktion

Husbyggnad

Styrkeområden

Energi

DOI

10.1088/1742-6596/2069/1/012030

Relaterade dataset

Presentation by Ali Naman Karim at International Buildings Physics Conference 2021 (online) [dataset] [dataset]

URI: https://play.chalmers.se/media/0_zdsm9xzs

Mer information

Senast uppdaterat

2022-01-04