20 research outputs found
Morteros cementicios con residuos pl谩sticos de PET y RAEE
En la industria de la construcci贸n se utilizan sistemas o componentes constructivos elaborados con materiales no renovables (por ejemplo: arena, piedra, metales, cemento) o de dif铆cil renovaci贸n (por ejemplo: suelo y madera). Esta industria continua en crecimiento y a pesar de los esfuerzos por frenar el consumo desmedido de material virgen, sigue consumiendo los recursos naturales del planeta.
Con la premisa de reducir el consumo de recursos naturales no renovables y disminuir la contaminaci贸n ambiental que generan los residuos, en el Centro Experimental de la Vivienda Econ贸mica -CEVE- se han desarrollado diferentes investigaciones que proponen el reciclado de residuos urbanos e industriales para la elaboraci贸n de componentes constructivos ecol贸gicos destinados a la construcci贸n de viviendas sociales y construcciones civiles en general.
Dentro de las tem谩ticas abordadas, se encuentran dos proyectos que incorporan residuos pl谩sticos a matrices cementicias para fabricar materiales de construcci贸n y componentes constructivos. Una de estas l铆neas plantea el uso de residuos de Polietilen-tereftalato (PET) proveniente de envases de bebidas mezclados con arena y cemento para fabricar ladrillos y bloques; en otro proyecto se estudia el uso de la fracci贸n pl谩stica de los Residuos de Aparatos El茅ctricos y Electr贸nicos (RAEE) recubiertos de una mezcla de cemento y aditivos estabilizantes mediante la t茅cnica del core-shell para fabricar un 谩rido sint茅tico.
La importancia de la implementaci贸n de estas tecnolog铆as radica en las ventajas econ贸micas, ambientales y sociales que tienen estos desarrollos, ya que permiten revalorizar desechos y disminuir el uso de materiales v铆rgenes, fabricando productos t茅cnicamente aptos y generando puestos de trabajo.In the construction industry there are used systems or building components made with not renewable raw materials (for example: sand, stones, metals, cement) or with difficult renewal like wood and soil.
This industry is growing and despite the efforts to diminish the wasteful consumption of virgin material, continues to consume the natural resources of the planet. With the premise of reducing the consumption of non-renewable natural resources and reduce the environmental pollution that the wastes generate, in the Experimental Center of Economical Housing -CEVE- we have developed different researches which propose the recycling of urban and industrial wastes, for the production of ecological components intended for the construction of social housing and civil constructions in general. Within the topics developed, are two projects that incorporate waste plastics to cement matrix to make construction materials and building components. One of these projects raises the use of residues of Polietilenterephthalate (PET) from drink bottles discarded mixed with sand and cement to make bricks and blocks. Other research work studied the use of the plastic fraction of Wastes from Electric and Electronic Equipment (WEEE) covered whit a mixture of cement and stabilizing additives through the core-shell technique to manufacture and synthetic aggregate (AS). The importance of these technologies is based on the economic, environmental and social advantages, because they allow to revalue wastes and reduce the use of virgin materials, manufacturing products technically suitable and generating jobs
A comparison between measurements and turbulence models in a turbine cascade passage
Detailed measurements of mean velocity, turbulence intensity and Reynolds stresses have been performed in the passage of a cascade of turbine rotor blades. By using the experimental values of the mean velocity, the turbulence quantities are computed with three different turbulence closure models. The results are analysed and compared with the experimental data. The capability of the closure models to describe the turbulence development associated with secondary flows in a turbine cascade is discussed.</jats:p