Open AccessAlkali-activated geopolymers based on iron-rich slag from copper industry
Author(s) -
Aleksandar Nikolov
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/951/1/012006
Subject(s) - fayalite , geopolymer , copper slag , compressive strength , slag (welding) , materials science , silicate , fly ash , ferric , metallurgy , alkali metal , sodium silicate , copper , chemical engineering , chemistry , mineralogy , composite material , organic chemistry , olivine , engineering
In the present study geopolymers were prepared using fayalite slag (iron-silicate fines) from copper producing plant (Aurubis Bulgaria AD). The influence of the different concentrations of alkali activator on properties and structure was examined. The prepared geopolymers were characterized by maximal compressive strength of about 27 MPa. The microstructural examination revealed that only small amount of the precursor reacted, but certain amount of ferric iron (Fe 3+ ) participate in the structure of newly formed geopolymer gel.