Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 400, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2023.132741
Keywords
Alkali activation; Waste glass; Aluminium salt slag; Sustainable binders; Alternative cementitious materials
Ask authors/readers for more resources
The potential of ceramic-stone-porcelain (CSP) and PAVAL as alkali-activated precursors was evaluated. Alkali-activated CSP and PAVAL binders were prepared using NaOH as the alkaline activator. The effect of Na2O/Al2O3 ratio and alkaline activator concentration on the chemical, physical, mechanical, and environmental properties was investigated. The results showed the formation of secondary reaction products and the influence of binder composition on porosity and mechanical performance. Furthermore, PAVAL was found to act as a precursor and pore-generator. The environmental characterization revealed significant leaching concentration of heavy metal(loid)s, which decreased over time.
The potential as alkali-activated precursors of ceramic-stone-porcelain (CSP) and PAVAL, two residues derived from the optical separation of glass cullet and salt slag from secondary aluminium recycling, has been assessed. Alkali-activated CSP and PAVAL binders' formulations were prepared using NaOH 4 M and 6 M as alkaline activator solutions. The effect of the Na2O/Al2O3 ratio and alkaline activator concentration was evaluated from a chemical, physical, mechanical, and environmental perspective. The results revealed the formation of secondary reaction products attributed to the formation of (C,N)-A-S-H gels. It also showed the influence of decreasing Na2O/Al2O3 ratio in the obtained binders, increasing porosity and affecting the mechanical performance. Besides, it was demonstrated that PAVAL acts as a precursor and pore-generator. Finally, the environmental characterisation showed a significant leaching concentration of heavy metal(loid)s such as As, Cr, Mo, Sb, and Se, which decreases with longer curing periods.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available