1. Chelating Agent Treatment on Leaded Residuals from Glass Separated Urban Collection to Be Used in Cement Mortars
- Author
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Elena Bursi, Isabella Lancellotti, Luisa Barbieri, Andrea Saccani, Maria Chiara Bignozzi, Bursi, Elena, Lancellotti, Isabella, Barbieri, Luisa, Saccani, Andrea, and Bignozzi, Maria Chiara
- Subjects
Soda-lime glass ,Environmental Engineering ,Materials science ,0211 other engineering and technologies ,chemistry.chemical_element ,Fraction (chemistry) ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,Aggregates for building material ,law.invention ,ASR ,Glass waste, Separated urban collection, Lead glass, Aggregates for building materials, Chelating agent treatment, ASR ,law ,Chelating agent treatment ,021105 building & construction ,Glass waste ,Pozzolanic activity ,Waste Management and Disposal ,0105 earth and related environmental sciences ,Separated urban collection ,Aggregate (composite) ,Renewable Energy, Sustainability and the Environment ,Metallurgy ,Barium ,Pozzolan ,Portland cement ,Lead glass ,chemistry ,visual_art ,Lead gla ,visual_art.visual_art_medium - Abstract
A mild chelating agent treatment was performed on the residuals of the sorting processes of separately collected urban glass, which is currently landfilled. This fraction, that represents about the 10 wt% of the overall collected glass, has a very heterogeneous composition and contains relatively high amounts of lead and barium and consequently cannot be used to produce new glass containers. This contaminated material shows, when used as fine aggregate in Portland Cement based composites, an expansive behaviour due to the alkali silica reactions. The expansion can only be partially reduced by using finely ground soda lime glass, showing pozzolanic activity. However, after the chelating agent treatment, because of heavy atoms surface depletion, the synergic effect of pozzolan addition leads to a suppressed expansion, thus allowing the use of waste in the formulation of cement composites. Graphical Abstract: [Figure not available: see fulltext.].
- Published
- 2018