Red clay ceramic production, incorporating e.g. metal surface treatment sludge, comprises inverting by water absorption reduction with increase in blend strength

摘要

The production of a red clay ceramic incorporating e.g. metal surface treatment sludge comprises the incorporation of up to 5 and 25 wt.% sludge or e.g. sand respectively in brick paste. An independent claim is also included for the product produced by the process, having a bend strength greater than 100 kgf/cm2 and less than 10% water absorption. The products are inert as defined in the Directive 1999/31/CE.