Self-heating function of carbon nanofiber cement pastes
- Autores: Óscar Galao Malo, F. Javier Baeza de los Santos, Emilio Zornoza Gómez, Pedro Garcés Terradillos
- Localización: Materiales de construcción, ISSN 0465-2746, Vol. 64, Nº. 314, 2014
- Idioma: inglés
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Resumen
The viability of carbon nanofiber (CNF) composites incement matrices as a self-heating material is reported in this paper. This functional application would allow the use of CNF cement composites as a heating element in buildings, or for deicing pavements of civil engineering transport infrastructures, such as highways or airport runways.
Cement pastes with the addition of different CNF dosages (from 0 to 5% by cement mass) have been prepared. Afterwards, tests were run at different fixed voltages (50, 100 and 150V), and the temperature of the specimens was registered. Also the possibility of using a casting method like shotcrete, instead of just pouring the fresh mix into the mild (with no system�s efficiency loss expected) was studied.
Temperatures up to 138 °C were registered during shotcrete-5% CNF cement paste tests (showing initial 10 °C/min heating rates). However a minimum voltage was required in order to achieve a proper system functioning.
