WASCON 2009- Sustainable Management of Waste and Recycled Materials in Construction Development of Operating Windows for Treatment of Industrial Wastes using Blended Binder Systems

Treatment by stabilisation/solidification (S/S) with hydraulic binders is often proposed for residual wastes that can not be destroyed or recycled. Mixing such wastes with cementitious or pozzolanic binders ideally results in a durable monolithic matrix in which pollutants are physically trapped and may have low solubility. Depending on the level of contamination and other waste characteristics that affect the final physical and chemical properties, products resulting from S/S may be suitable for utilisation or disposal. Development of formulations for waste S/S is complicated by potentially detrimental interactions between components of waste and hydraulic binders, and therefore necessitates intensive development in the laboratory. UCL is leading a collaborative project funded through the UK Technology Strategy Board (ProCeSS Consortium 2005), with the participation of 4 other universities, and 17 industrial partners, to support good practice in S/S by developing operating windows for generic S/S of four common UK residual waste types: metal treatment sludges, air pollution control residues from municipal waste incineration, electric arc furnace dust and contaminated soil. A group of screening tests has been assembled for application to a range of stabilised/solidified (s/s) products (Stegemann & Zhou 2008) prepared usin