The combustion of municipal waste is one of ways to meet nowadays the EU requirements to reduction of amount of dumped waste. The municipal solid waste incinerators (MSWI) convert waste to energy and certain amount of solid waste materials – fly ash and slag. These solid waste materials contain, besides other components, toxic heavy metals which have to be stabilized against leaching out from the waste material before it can be safely stored at a land fill. The MSWI solid waste materials have latent hydraulic or puzzolanic properties. This fact offers an effective way of heavy metals immobilization which will be studied in the present project: the waste materials will be used as partial replacement of portland cement and/or aggregates in cement based composite – concrete. Optimal way of mixing of MSWI solid waste and portland cement will be sought with respect to the resulting properties of the immobilization product (cement-based composite). Namely, degree of heavy metals immobilization and building application properties (strength, durability) of the immobilization product will be studied. The immobilization of heavy metals in the product will be modeled numerically as well. The materials under study are generated at MSWI plant Termizo in Liberec, Czech Republic. The result of the project will be formulation of materials suitable for heavy metals immobilization which will have suitable properties for application in building industry as well.

© Ing. Lukáš Fiala 2009. All rights reserved