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Thermal conductivity of geomaterial foams based on silica fume

Julie Bourret 1, 2 Elodie Prud'Homme 1 Sylvie Rossignol 1 David Stanley Smith 1, * 
* Auteur correspondant
2 SPCTS-AXE1 - Axe 1 : procédés céramiques
SPCTS - Science des Procédés Céramiques et de Traitements de Surface
Abstract : Porous materials have been prepared from a solution containing sodium silicate and sodium hydroxide with the addition of silica fume. Kaolin and diatomite were also tested as additives to the initial formulation. This method yields consolidated geomaterial foams without requiring thermal treatment above 50∘C. The influence of chemical composition on the thermal conductivity was studied. The choice of raw materials was found to play an important role. The accuracy of thermal conductivity measurements was evaluated by comparing the steady state heat flow method with the laser flash technique for five different reference materials giving values within 6%. Using the steady state heat flow method, a value of 0.12±0.01Wm−1K−1 was then obtained for consolidated foams, made with kaolin as the precursor, containing approximately 70% of porosity.
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Soumis le : vendredi 13 février 2015 - 15:07:54
Dernière modification le : samedi 26 mars 2022 - 04:30:33

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Julie Bourret, Elodie Prud'Homme, Sylvie Rossignol, David Stanley Smith. Thermal conductivity of geomaterial foams based on silica fume. Journal of Materials Science, Springer Verlag, 2012, 47 (1), pp.391-396. ⟨10.1007/s10853-011-5810-3⟩. ⟨hal-01116485⟩



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