HUANG Jiening, HU Mingyu , PENG Jinsheng
(College of Architectural Engineering, Nanchang University, Nanchang 330031, Jiangxi, China)
Abstract: Foam insulation ceramics were prepared by means of dry pressing and sintering at a certain temperature, using waste coal shale as the main material, polishing slag as the main pore-forming agent and talc as the flux. The influence of different material composition and sintering schedule on their apparent density, porosity rate and water absorption were studied. Under optimized conditions, i.e. sintered at 1250 ℃,with 10% talc, and 25% polishing slag, the specimens’ apparent densities were 0.80 ~ 0.90 g/cm3, their porosities were over 50% and their water absorptions were less than 2%, which could be a new kind of green energy-saving building material with closed pores of uniform distribution.
Key words: waste coal shale; heat insulation; foam ceramics