title: Alkali activation processes for incinerator residues management.
abstract: Incinerator bottom ash (BA) is produced in large amount worldwide and in Italy, where 5.1 millionstons of municipal solid residues have been incinerated in 2010, corresponding to 1.2-1.5 millionstons of produced bottom ash. This residue has been used in the present study for producing dense geopolymers containing high percentage (50-70 wt%) of ash. The amount of potentially reactive aluminosilicate fraction in the ash has been determined by means of test in NaOH. The final properties of geopolymers prepared with or without taking into account this reactive fraction have been compared. The results showed that due to the presence of both amorphous and crystalline fractions with a different degree of reactivity, the incinerator BA geopolymers exhibit significant differences in terms of Si/Al ratio and microstructure when reactive fraction is considered.
authors.affiliation: Department of Engineering Enzo Ferrari, University of Modena and Reggio Emilia, Via Vignolese 905/A, 41125 Modena, Italy. isabella.lancellotti@unimore.it
authors.forename: Isabella
authors.initials: I
authors.lastname: Lancellotti
authors.forename: Chiara
authors.initials: C
authors.lastname: Ponzoni
authors.forename: Luisa
authors.initials: L
authors.lastname: Barbieri
authors.forename: Cristina
authors.initials: C
authors.lastname: Leonelli
mesh_terms: D000468:Alkalies / Q000737:chemistry*; D060729:Coal Ash / Q000032:analysis / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D017745:Incineration / Q000379:methods*; D058105:Polymerization; D059027:Recycling; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
chemical_list: D000468:Alkalies; D060729:Coal Ash
keywords: Alkali activation; Incinerator bottom ash; Reactive phase; Recycling