Ground porcelain stoneware scraps were recycled as main component (up to 80 wt%) in alkali bonded insulating panels. Sandwich panels were prepared by varying the scraps dimension and amount in the core and skins.The binder for the alkali bonding was prepared by using highly reactive metakaolin as raw powder, while the alkali aqueous solution was KOH/K2SiO3 mixture. The setting was performed at 80?C for 24 h. The thermal conductivity at room temperature was 0.7 W.m-1.K-1. Dilatometric analyses were performed up to1200?C to study the structural modification. A thermal treatment of conditioning at 600?C prevented any structural degradation upon long term immersion in water
展开▼
