LEIVA FERNÁNDEZ , Carlos

El objeto de esta tesis ha sido el de encontrar nuevas aplicaciones para las cenizas volantes y escorias procedentes de la combustión y gasificación de carbón, biomasa y residuos sólidos urbanos, realizando la recuperación de las mismas como constituyentes mayoritarios de nuevos productos con uso potencial dentro del campo de la protección...

The aim of this study is to compare the mechanical and physical properties of different geopolymer mortars made with granulated blast furnace slag as a geopolymer source material, NaOH (8 M) as the activating solution, and three different types of fine aggregates (air-cooled blast furnace slag, biomass bottom ashes, and silica sand). The...

The aim of this work is the development of a porous geopolymeric foam with sound absorbing properties using silica fume as the pore generation agent. The samples were manufactured using a coal combustion fly ash as source material for the geopolymerization reaction, an alkaline solution as activating solution and silica fume as pore forming...

This research analyzes whether a titanium dioxide waste (TiO2 waste) can be used as a source material for geopolymers with good fire resistance properties. Samples with differ ent proportions were prepared, replacing fly ashes with titanium dioxide waste on geopolymers (0, 20, 30, 40 and 100% w/w). The activating solution has a Na2O/SiO2 molar...

This paper presents the results of a study about the effect of fire on geopolymer paste composed of fly ashes, metakaolin and sodium silicate. 2 cm thick, 28 cm high and 18 cm wide panels were filled with the paste obtained. After 28 days of curing at 20 °C and 45% of relative humidity, different tests were carried out in the geopolymers:...

El objetivo de este trabajo es analizar el efecto que la adición de nano-sílice, mezclado en solución líquida durante el proceso de amasado, provoca en las propiedades mecánicas de un hormigón de muy alta resistencia. Para ello, se analizaron diferentes mezclas, todas ellas con la misma composición inicial y diferentes porcentajes de...