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Detoxified spent pot lining from aluminum production as (alumino-)silicate source for composite cement and autoclaved aerated concrete [Elektronski vir]Peys, Arne ...New sources of supplementary cementitious materials (SCMs) are needed to meet the future demand. A potential new source of SCM is spent pot lining, a residue from aluminum production. The present ... work showed that the refined aluminosilicate part of spent pot lining (SPL) has a moderate chemical reactivity in a cementitious system measured in the R3 calorimetry test, comparable to commercially used coal fly ash. The reaction of SPL led to the consumption of Ca(OH)2 in a cement paste beyond 7 days after mixing. At 28 and 90 days a significant contribution to strength development was therefore observed, reaching a relative strength, which is similar to composite cements with coal fly ash. At early age a retardation of the cement hydration is caused by the SPL, which should most likely be associated with the presence of trace amounts of NH3. The spent pot lining is also investigated as silica source for autoclaved aerated concrete blocks. The replacement of quartz by spent pot lining did not show an adverse effect on the strength-density relation of the lightweight blocks up to 50 wt% quartz substitution. Overall, spent pot lining can be used in small replacement volumes (30 wt%) as SCM or as replacement of quartz (50 wt%) in autoclaved aerated concrete blocks.Vir: Applied sciences [Elektronski vir]. - ISSN 2076-3417 (Vol. 11, iss. 8, 2021, str. 1-16)Vrsta gradiva - e-članek ; neleposlovje za odrasleLeto - 2021Jezik - angleškiCOBISS.SI-ID - 60732675
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DOI
Avtor
Peys, Arne |
Košir, Mateja, 1985- |
Snellings, Ruben |
Mladenovič, Ana |
Horckmans, Liesbeth
Teme
katodni odpad |
gradbeni materiali |
recikliranje |
avtoklaviran porobeton |
nadomestni cementni material |
odprti dostop |
spent pot lining |
construction materials |
recycling |
autoclaved aerated conctrte |
supplementary cementitious material |
open access
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Avtor | Peys, Arne ... |
Naslov | Detoxified spent pot lining from aluminum production as (alumino-)silicate source for composite cement and autoclaved aerated concrete [Elektronski vir] |
Datum objave | 2021-04-20 |
COBISS.SI-ID | 60732675 |
Verzija objave v repozitoriju | Založnikova različica |
Licenca objave v repozitoriju | Creative Commons Priznanje avtorstva 4.0 Mednarodna |
Embargo | Takojšnja javna objava |
Projekti, iz katerih je bila financirana objava
Naziv | Akronim | Številka projekta | Financer |
---|---|---|---|
Closing the loop of the Spent Pot‐line (SPL) in Al smelting process | SPL-Cycle | 17141 |
European Institute of Innovation and Technology |
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Peys, Arne | ![]() |
Košir, Mateja, 1985- | 34442 |
Snellings, Ruben | ![]() |
Mladenovič, Ana | 05930 |
Horckmans, Liesbeth | ![]() |
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