
handle: 10261/26029
[ES] Este trabajo describe el efecto de determinadas variables de trabajo sobre la evolución microestructural de sistemas basados en cenizas volantes térmica y alcalínamente activadas. Los resultados demuestran que el principal producto de reacción en el proceso de activación (en todos los sistemas estudiados) es un aluminosilicato amorfo con características de gel y con estructura tridimensional. Sin embargo el tipo y la concentración del activador usado, así como el envejecimiento natural de los materiales y el origen diferente de las materias primas han demostrado también ser variables que afectan sustancialmente al desarrollo microestructural de los "geopolimeros" sintetizados, especialmente desde el punto de vista morfológico.
[EN] The present paper describes the effect of certain working variables on the microstructural evolution of oven-dried, alkali-activated fly ash. The results show that the main reaction product in the activation process (in all the systems studied) is an amorphous aluminosilicate gel with a three-dimensional structure. Nonetheless, the type and concentration of the activator used as well as the natural ageing of the materials and origin of the prime materials were also found to have a substantial impact on microstructural development in the "geopolymers " synthesised, particularly from the morphological standpoint.
La Dirección General de Investigación Científica del MCYT mediante la financiación del proyecto COO-1999-AX-038. El Gobierno de la Comunidad de Madrid por una beca postdoctoral asociada a esta investigación.
14 páginas, 14 figuras, 3 tablas.
Peer reviewed
Cenizas volantes, Alkaline activation, Fly ash, Metacaolín, Activación, Microstructure, Metakaolin
Cenizas volantes, Alkaline activation, Fly ash, Metacaolín, Activación, Microstructure, Metakaolin
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