Feasibility Study of Municipal Solid Waste Incinerator Bottom Ash as Geopolymer Precursor

The potential of municipal solid waste incinerator bottom ash (IBA) as the sole precursor to synthesize geopolymer was investigated. Ground IBA powder was mixed with water glass and sodium hydroxide solution. After curing, the hardened samples were characterized by FTIR and NMR together with Salicylic acid/methanol extraction (SAM) to identify chemical composition of hardened binder. It was found that the IBA binder consists of one third of alkali-modified C-S-(A)-H and some geopolymeric gel with zeolite-like nano-structures.