Thermal conductivity of biochar-clay composites for the internal insulation of buildings
The application of biochar-clay composites as internal insulation of buildings is very promising since the employed materials are ecological and commonly available, corresponding to a forward-looking construction method. To bring this solution to its full potential however, additional data on the th...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-12-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221450952401235X |
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| _version_ | 1850105716182876160 |
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| author | Michele Bianchi Janetti Martina Krusharova Florian Fend Kai Längle Thomas Mathis |
| author_facet | Michele Bianchi Janetti Martina Krusharova Florian Fend Kai Längle Thomas Mathis |
| author_sort | Michele Bianchi Janetti |
| collection | DOAJ |
| description | The application of biochar-clay composites as internal insulation of buildings is very promising since the employed materials are ecological and commonly available, corresponding to a forward-looking construction method. To bring this solution to its full potential however, additional data on the thermal performance of such composites are required. In this study new biochar-clay composites are investigated by varying composite’s parameters such as biochar and clay type, biochar weight fraction and addition of natural fibres. Measurements of the thermal conductivity are performed by the heat flow metre method at different temperatures and moisture contents. Based on the measured outcomes, an empirical model is developed and calibrated to predict the impact of the composite`s density, temperature and moisture content on the composite thermal conductivity. At an average temperature of 20 °C and dry conditions, for composite densities ranging between 222 and 610 Kg/m3, thermal conductivities between 0.06 and 0.18 W/(m K) are obtained. Combined increases of temperature and moisture content of 10 K and 20 Kg/m3 lead to an increase of the thermal conductivity of the composite between 10 % and 26 %, depending on the composite type. |
| format | Article |
| id | doaj-art-3905b70ae5094cbd86afd1fce90d3dcf |
| institution | OA Journals |
| issn | 2214-5095 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-3905b70ae5094cbd86afd1fce90d3dcf2025-08-20T02:38:59ZengElsevierCase Studies in Construction Materials2214-50952024-12-0121e0408310.1016/j.cscm.2024.e04083Thermal conductivity of biochar-clay composites for the internal insulation of buildingsMichele Bianchi Janetti0Martina Krusharova1Florian Fend2Kai Längle3Thomas Mathis4University of Innsbruck, Institute for Structural Engineering and Material Sciences, Unit for Energy Efficient Building, Technikerstrasse 13, Innsbruck 6020, Austria; Corresponding author.University of Innsbruck, Institute for Structural Engineering and Material Sciences, Unit for Energy Efficient Building, Technikerstrasse 13, Innsbruck 6020, Austrianatürlich bauen, Kirlastraße 118, Götzis 6840, Austrianatürlich bauen, Kirlastraße 118, Götzis 6840, Austrianatürlich bauen, Kirlastraße 118, Götzis 6840, AustriaThe application of biochar-clay composites as internal insulation of buildings is very promising since the employed materials are ecological and commonly available, corresponding to a forward-looking construction method. To bring this solution to its full potential however, additional data on the thermal performance of such composites are required. In this study new biochar-clay composites are investigated by varying composite’s parameters such as biochar and clay type, biochar weight fraction and addition of natural fibres. Measurements of the thermal conductivity are performed by the heat flow metre method at different temperatures and moisture contents. Based on the measured outcomes, an empirical model is developed and calibrated to predict the impact of the composite`s density, temperature and moisture content on the composite thermal conductivity. At an average temperature of 20 °C and dry conditions, for composite densities ranging between 222 and 610 Kg/m3, thermal conductivities between 0.06 and 0.18 W/(m K) are obtained. Combined increases of temperature and moisture content of 10 K and 20 Kg/m3 lead to an increase of the thermal conductivity of the composite between 10 % and 26 %, depending on the composite type.http://www.sciencedirect.com/science/article/pii/S221450952401235XBiochar-clay compositesInternal insulationRecyclable materialsThermal conductivityHeat flow meter |
| spellingShingle | Michele Bianchi Janetti Martina Krusharova Florian Fend Kai Längle Thomas Mathis Thermal conductivity of biochar-clay composites for the internal insulation of buildings Case Studies in Construction Materials Biochar-clay composites Internal insulation Recyclable materials Thermal conductivity Heat flow meter |
| title | Thermal conductivity of biochar-clay composites for the internal insulation of buildings |
| title_full | Thermal conductivity of biochar-clay composites for the internal insulation of buildings |
| title_fullStr | Thermal conductivity of biochar-clay composites for the internal insulation of buildings |
| title_full_unstemmed | Thermal conductivity of biochar-clay composites for the internal insulation of buildings |
| title_short | Thermal conductivity of biochar-clay composites for the internal insulation of buildings |
| title_sort | thermal conductivity of biochar clay composites for the internal insulation of buildings |
| topic | Biochar-clay composites Internal insulation Recyclable materials Thermal conductivity Heat flow meter |
| url | http://www.sciencedirect.com/science/article/pii/S221450952401235X |
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