Utilisation of different types of coal fly ash in the production of ceramic tiles

Abstract

The influence of varying proportions of different types of fly ash (used in place of feldspar) and different sintering temperatures on the sintered properties of ceramic tile bodies was evaluated. The results indicated that sintering ceramic tiles with a high fly ash content at a high temperature caused a decrease in the properties because of bloating. The ceramic samples containing a higher amount of fly ash that were sintered at low temperature exhibited lower water absorption, larger shrinkage and strength because of the densification observed also in microstructural investigation.Keywords: Sintering; Microstructure; Mechanical properties; Tiles. Utilización de diferentes tipos de cenizas volantes de carbón en la producción de baldosas cerámicasSe ha evaluado la influencia de la proporción de diferentes tipos de cenizas volantes (en lugar de feldespato) y diferentes temperaturas de sinterización en las propiedades de soportes cerámicos. Los resultados indicaron que las composiciones con un alto contenido de cenizas volantes provocaron una disminución en las propiedades de las piczas cocidas a alta temperatura como consecuencia del hinchamiento. Las composiciones con una mayor cantidad de cenizas sinterizadas a baja temperatura mostraron una menor absorción de agua, mayor contracción y resistencia mecánica debido a la densificación como también se observó en la investigación microestructural.

A comprehensive review on the applications of coal fly ash

“…It is possible to use maximum 20 wt.% of FBC ash in the fly ash-clay mixture. Kockal [95] evaluated the effects of fly ash addition and sintering temperatures on the sintered properties of ceramic tile bodies. The results indicated that incorporating fly ash into the ceramic slurry produced a ceramic body with comparable properties as that of commercial ceramic materials.…”

Effects of corundum in the development of structural, mechanical and tribological properties of raw materials for the manufacture of structural products

“…Fig. 1 shows the dilatometric curves of the samples; the development of this analysis was performed from room temperature up to 1000 ºC to observe the initial behavior of the material because it is at this temperature range where most of the reactions occur that should be controlled when the material is sintered at high temperatures [12]. All the curves presented the same behavior with slight differences in M0, which presented a curve a little more upwards in comparison with the others.…”

“…It was observed that increasing the corundum reduced the expansion, displacing the zone of the first great contraction at higher temperatures and with a lower slope causing a slow and gradual decrease of the dimensions up to 1000 °C, improving the cooking at high temperatures and increasing the structural, mechanical and tribological properties, as is shown later. Furthermore, it is generally known that ceramic materials having lower coefficients of thermal expansion exhibit higher resistance to thermal shock, despite their low ductility [12,15].…”

Uso de nutrientes tecnológicos como materia prima en la fabricación de materiales de construcción en el paradigma de la economía circular

“…De igual manera la porosidad abierta se manifiesta en mezclas cerámicas con adiciones de cenizas de incinerador de biomasa [38], con el que la absorción de agua aumenta, mientras la densidad aparente y la resistencia a la compresión disminuye a mayores adiciones de este residuo, mientras que las mezclas con adición de cenizas de centrales termoeléctricas en reemplazo del feldespato [39], generan un comportamiento contrario, menor absorción de agua, mayor densidad y resistencia a la compresión.…”