Reactivity of Crystalline Slags in Alkaline Solution
Name
TMS2019_BTraynoretal..pdf
Description
Accepted version
Size
542.41 KB
Format
Adobe PDF
Checksum (MD5)
61a3a47dae4cdbce070b6700956144c9
Author(s)
Traynor, Brian
Uvegi, Hugo
Chaunsali, Piyush
Olivetti, Elsa
Date Issued
2019
Publisher
Springer International Publishing
Version
Author's final manuscript
Abstract
© The Minerals, Metals & Materials Society 2019. Slags with varied amorphous and crystalline content, typical of iron and steel production, are generally underutilized. One promising reuse pathway for these wastes is chemical activation, producing alternatives to conventional building materials with lower embodied energy. The formation of a hardened binder is dependent on the slag mineralogy and, specifically, the reactivity of relevant phases. Reactivity can be understood by monitoring elemental dissolution rates through inductively coupled plasma (ICP-OES) analysis. Post-dissolution ICP analysis of activating solution and spectroscopic analysis of remaining solids was performed on several highly crystalline slags and on relevant synthetic minerals to track changes in chemical and phase composition. Amorphous and ionic phases have been observed as more reactive than other crystalline phases. This work aims to inform future studies on waste blending in alkali-activated systems, a promising avenue for valorization of industrial wastes with varied physicochemical properties. To this end, dissolution tests with varied initial Si, Al, and Ca concentrations in activating solution were also performed.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/978-3-030-10386-6_21
