  The disposal of incinerator bottom ash usually produced by the incineration
of inorganic constituents of the municipal solid wastes (MSW) in an
eco-friendly way is one of the issues of concern, globally. By the way, the
present study is related to the utilization of MSW incinerator bottom ash and
recycled demolition waste aggregate as partial replacement materials for fine
and coarse aggregate, respectively to produce eco-friendly concrete. This study
adopted an innovative pretreatment technique for stabilizing the MSW
incinerator bottom ash. Five distinct M20 grade concrete mixes were produced
with different proportions of fine aggregate, MSW incinerator bottom ash,
coarse aggregate, and recycled demolition waste aggregate along with cement and
water. The incinerator bottom ash was replaced at 5% and 10% quantities with
fine aggregate and the recycled demolition waste aggregate was replaced at 40%
and 60% of the weight of the coarse aggregate. The strength and durability
properties of the M20 grade concrete were analyzed. It was noticed that the
strength and durability properties of the eco-friendly concrete specimens
produced by incorporating 5% - incinerator bottom ash and 40% - recycled
demolition waste aggregate were superior to that of the control mix concrete.
Laboratory tank leaching tests showed that the eco-friendly concrete do not
pose any significant environmental hazard. Furthermore, the microstructural
analysis through scanning electron microscope (SEM) images, revealed dense
aggregate paste matrix interfaces with less micro-pores and insignificant
micro-cracks due to the incorporation of incinerator bottom ash as a partial
replacement to the fine aggregate.
