An advanced technique for recycling fly ash and waste glass

FA glass-ceramic was prepared by using fly ash from the thermal power plant and waste glass. A mixture of two different powders, about 60 g of fly ash and waste glass, was mechanically ground in a disk type ball mill for 4 h (700 rpm). After milling, the mixture was pressed into a cylindrical form having a diameter of 10 mm and length of 30 mm without using any binder. The formed specimens was placed in a box-type SiC furnace, and the temperature was increased to 5 degrees C min(-1) and sintered at different temperatures (800, 900, and 1000 degrees C for 1 h, respectively). Crystallinity, morphological properties, and chemical compositions were observed by X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), and energy dispersive X-ray spectrometer (EDX). Various properties, such as density, compressive strength, bending strength and chemical durability were also examined. (c) 2004 Elsevier B.V. All rights reserved.