Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6480667 | Construction and Building Materials | 2017 | 9 Pages |
â¢Graphite increases bulk density and λ up to 19% and 97%, respectively.â¢Specific heat capacity is ranging from 1.01 and 1.22 kJ/kg.K.â¢Emissivity increases between 6.1% and 10.3% with the graphite addition.â¢Graphite-gypsum board reduces thermal fluxes between 6% and 54%.â¢Graphite-gypsum boards shows a higher efficiency of the radiant system.
European standards place great emphasis on the reintroduction of waste in the production chain. In this research, a combination of experimental tests has been carried out to analyse the use of revalorized isostatic graphite powder waste in gypsum-based boards. A series of gypsum pastes was prepared with a graphite content ranging from 0% to 25%, by weight substitution, and two w/b ratios. Its addition significantly increased the bulk density, thermal conductivity and emissivity of the samples until 19%, 97% and 10%, respectively. Additionally, a reduction of 54% in thermal fluxes towards the outside can be achieved when graphite-gypsum boards replaced gypsum ones at radiative constructive solutions.
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