Evaluación ambiental de materiales obtenidos por activación alcalina de arcillas de Bailén y cenizas de biomasa del olivar empleando el análisis del ciclo de vida.
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2020-09-04
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Jaén: Universidad de Jaén
Resumen
En este estudio se ha evaluado el impacto ambiental de la fabricación de una de serie de geopolímeros que emplean
como fuente de aluminosilicatos arcillas de Bailén y como activador alcalino, cenizas volantes de orujillo que se activarán
empleando distintas soluciones activantes: agua, sosa (8M), potasa (8M); sosa (8M)-silicato sódico y potasa (8 M)-silicato
potásico.. Para ello se ha empleado el software SimaPro que ha permitido realizar un análisis de ciclo de vida de los
geopolímeros analizando diferentes categorias de impacto y determinar la huella de carbono. Los resultados indican que
el empleo de cenizas de orujillo como activador alcalino da lugar a geopolímeros con menores propiedades mecánicas
pero menor impacto ambiental. El empleo de sosa o potasa da lugar a un incremento de la huella de carbono, siendo
mayor este incremento cuando se emplea potasa. Finalmente el empleo de silicatos da lugar a geopolímeros con
propiedades mecánicas mayores pero con mayor impacto ambiental.
This study has evaluated the environmental impact of the manufacture of a series of geopolymers that use Bailén clays as a source of aluminosilicates and as alkaline activator, pomace fly ash that will be activated using different activating solutions: water, soda (8M) , potash (8M); soda (8M) -sodium silicate and potash (8 M) -potassium silicate .. For this, the SimaPro software has been used, which has made it possible to carry out a life cycle analysis of geopolymers, analyzing different impact categories and determining the carbon footprint. . The results indicate that the use of olive pomace ash as an alkaline activator gives rise to geopolymers with lower mechanical properties but less environmental impact. The use of soda or potash leads to an increase in the carbon footprint, this increase being greater when potash is used. Finally, the use of silicates gives rise to geopolymers with higher mechanical properties but with greater environmental impact.
This study has evaluated the environmental impact of the manufacture of a series of geopolymers that use Bailén clays as a source of aluminosilicates and as alkaline activator, pomace fly ash that will be activated using different activating solutions: water, soda (8M) , potash (8M); soda (8M) -sodium silicate and potash (8 M) -potassium silicate .. For this, the SimaPro software has been used, which has made it possible to carry out a life cycle analysis of geopolymers, analyzing different impact categories and determining the carbon footprint. . The results indicate that the use of olive pomace ash as an alkaline activator gives rise to geopolymers with lower mechanical properties but less environmental impact. The use of soda or potash leads to an increase in the carbon footprint, this increase being greater when potash is used. Finally, the use of silicates gives rise to geopolymers with higher mechanical properties but with greater environmental impact.
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Ingeniería mecánica