Recycled additions for improving the thermal conductivity of concrete in preparing energy storage systems
| Autor: | Carmelo E. Majorana, D. Mazzei, Giuseppe Mauro Giannuzzi, F. Girardi, Valentina Salomoni, R. Di Maggio |
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| Přispěvatelé: | Mazzei, D., Giannuzzi, G. M. |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Textile
Materials science Thermal energy storage device 020209 energy Metallic shaving 02 engineering and technology Thermal treatment Thermal energy storage Energy storage Metal Thermal conductivity Fibre-reinforced concrete Metallic shavings Textile carpet waste Civil and Structural Engineering Building and Construction Materials Science (all) 0202 electrical engineering electronic engineering information engineering General Materials Science Composite material business.industry 021001 nanoscience & nanotechnology Casting visual_art Polyamide visual_art.visual_art_medium 0210 nano-technology business |
| DOI: | 10.1016/j.conbuildmat.2016.12.179&partnerID=40&md5=105515029f7e8b5fd7a61b3e909eda1f |
| Popis: | Two types of concretes were prepared in order to build thermal storage units for solar plants having as primary aim to improve thermal conductivity. The first type consists of concrete for casting on site (A), whereas the second for moulding upon vibration (B). Samples of both typologies were prepared changing type of additions or aggregates. The use of recycled materials into concrete (e.g. polyamide fibres from post-consumer textile carpet waste, metallic powders or shavings and steel fibres) was investigated. Fibre-reinforced concretes were tougher (up to 300%) than ordinary ones. All the concretes show high thermal conductivity and are good candidates for an efficient thermal storage unit, but the performances of type B concretes are better than those of type A. Moreover, the morphology of type B concretes appears compact and less cracked, even after thermal treatment at temperature higher than 300 °C. The thermal conductivity of the mix containing polyamide fibres and metallic shavings was 2.74 and 2.13 W/m °C, before and after a thermal treatment of 4 h at 300 °C, respectively. © 2017 Elsevier Ltd |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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