MSWI Bottom Ash Utilization in Concrete Mixes

In recent years, along with the global development of the Circular Economy concept and in order to minimise the quantity of waste disposed, waste recovery and reuse of recovered materials as raw materials in various industries while preserving the natural resources is strongly encouraged. One of the strands in development of these trends is the reuse of slag (bottom ash) produced from municipal waste incineration in concrete mixes. The article gives a brief overview of the possibilities for the use of slag produced during the municipal waste incineration for the formation of concrete mixes. A brief overview of global experience in this area has been provided. The technological process of waste incineration in Lithuania and the chemical composition of the resulting ash have been described in general terms. The results of preliminary tests of concrete mixes with bottom ash performed at Vilnius Gediminas Technical University have been presented. The tests performed show that a properly selected content of bottom ash can be used as a substitute for fine aggregates in concrete mixes. The initial results give impetus to further research in the field of application of secondary raw materials for concrete mixes.