EFECTO DE LA SUSTITUCIÓN DE CLÍNKER DE CEMENTO PORTLAND POR ESCORIAS DE ACERO Y/O VIDRIO PARA LA OBTENCIÓN DE CEMENTOS HÍBRIDOS DE ACTIVACIÓN ALCALINA
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2024-09-18
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Jaén: Universidad de Jaén
Resumen
En este Trabajo Fin de Grado se ha llevado a cabo un estudio sobre la viabilidad de la fabricación de
cementos de activación alcalina y cementos híbridos en los que se ha sustituido un 70 % de clínker por
subproductos industriales, escorias de acero de arco eléctrico y/o vidrio. Los precursores empleados como
fuente de aluminosilicatos son escorias siderúrgicas de acero de arco eléctrico y vidrio activados
alcalinamente empleando una disolución al 50 % de hidróxido sódico 8 M y silicato sódico. Los resultados
indican que los cementos de activación alcalina presentan mayores propiedades mecánicas, físicas y
térmicas que los cementos híbridos en los que un 70 % de clínker ha sido sustituido por los subproductos
industriales. Los cementos que presentan superiores propiedades mecánicas y mayor capacidad de
aislamiento térmico son los cementos de activación alcalina basados en vidrio debido posiblemente a la
mayor reactividad del residuo y a la mayor formación de productos de reacción, gel geopolimérico más
resistente.
In this Final Degree Project, a study has been carried out on the feasibility of manufacturing alkaline activated cements and hybrid cements in which 70 % of clinker has been replaced by industrial by-products, electric arc steel slags and/or glass. The precursors used as a source of aluminosilicates are steel slags from electric arc steel and glass alkaline activated using a 50 % solution of 8 M sodium hydroxide and sodium silicate. The results indicate that alkaline activated cements show higher mechanical, physical and thermal properties than hybrid cements in which 70 wt % of clinker has been replaced by industrial by-products. The cements that show superior mechanical properties and higher thermal insulation capacity are the glass- based alkaline-activated cements, possibly due to the higher reactivity of the residue and the higher formation of reaction products, a more resistant geopolymer gel.
In this Final Degree Project, a study has been carried out on the feasibility of manufacturing alkaline activated cements and hybrid cements in which 70 % of clinker has been replaced by industrial by-products, electric arc steel slags and/or glass. The precursors used as a source of aluminosilicates are steel slags from electric arc steel and glass alkaline activated using a 50 % solution of 8 M sodium hydroxide and sodium silicate. The results indicate that alkaline activated cements show higher mechanical, physical and thermal properties than hybrid cements in which 70 wt % of clinker has been replaced by industrial by-products. The cements that show superior mechanical properties and higher thermal insulation capacity are the glass- based alkaline-activated cements, possibly due to the higher reactivity of the residue and the higher formation of reaction products, a more resistant geopolymer gel.