In this paper, results about an experimental study performed on plaster compounds with the incorporation of rubber in the form of fibers from end of life tires are reported and analyzed. Test samples of plaster are prepared adding different volumetric fractions of rubber fibers that had been previously classified into two different sizes. The same consistency is fixed for every compound studied. Physical and mechanical properties are analyzed. Thermal behavior is also studied comparing thermal conductivity values and relating them with the bulk density of the resulting material.
The results show an improvement in the thermal behavior proportional to the reduction of the density and the mechanical properties, as the proportion of rubber increases. It is also observed that there are no significant differences depending on the size of the fibers. These results confirm that the new material obtained is comparable to other materials of lightweight plaster with improved thermal properties and therefore with the same possibilities of use as these materials. The new material could be used for slabs and compression layers in building rehabilitation.
Keywords: Plaster, rubber fibers, mechanical properties, thermal conductivity, acoustic insulation.
Resumen-En este trabajo se analizan los efectos de la incroporación de algunas de las fibras más utilizadas en el Mercado (basalto, vidrio, poliolefina y polipropileno) en las propiedades mecánicas de compuestos de yeso-caucho de neumáticos fuera de uso (NFU). Para ello, se elaboran probetas de escayola-caucho NFU con adición de fibras en proporciones del 1% en peso y se caracterizan mediante ensayos físicos y mecánicos estudiando su densidad aparente, resistencia a flexión y compresión y módulo de elasticidad dinámico. Los resultados obtenidos muestran mejoras en todos los aspectos analizados, obteniéndose materiales más ligeros y con mejor comportamiento mecánico especialmente en los compuestos que incorporan fibra de vidrio. Palabras Clave-Escayola; residuos de caucho NFU; fibras de vidrio; fibras de basalto; fibras de polipropileno; fibras sintéticas.
Desarrollo de una metodología basada en el aprendizaje multidimensional en las disciplinas técnicas Daniel García de Frutos, Amparo Verdú Vázquez, Francisco David de la Peña Esteban, Oscar López Zaldívar
Advances in Building Education
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