.
Physical properties and strength of artificial lightweight sintered
aggregates produced from various industrial by products
were previously investigated [7–10]. One advantage of using pulverized
coal fly ash compared to other types of ashes in the production
of sintered lightweight aggregate is that it promotes fuel
efficiency because burning of the carbon in fly ash supplements
the heat needed to evaporate the moisture in the pellets and to
bring them to the sintering temperature [11].