Abstract
Two fine-grained residues produced by gasification of wastes were tested
for their suitability in aerated autoclaved concrete (AAC). AAC
typically has additional aluminium powder added to the raw ingredients
to facilitate the formation of small gas bubbles which provide a
low-density product. Both gasification residues had high amounts of
metallic aluminium and thus were well suited for this application.
Studies were conducted to determine whether the residue addition would
eliminate the need for the extra aluminium powder for creating air
voids. Simultaneously, the residues replaced some of the aggregate
ground in the process, thus enabling savings in energy consumption.
Initial laboratory tests determined how much residue could be added and
what type of concrete mixture proportioning was needed. Multiple
properties were tested on AAC with 10% residue addition, with and
without the additional aluminium powder. After laboratory
investigations, full-scale tests were done at the Siporex AAC factory in
Finland. These tests revealed that the residues offer a promising
resource for economic production of AAC without detrimental effects to
the final products.
Original language | English |
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Pages (from-to) | 796 - 802 |
Number of pages | 7 |
Journal | Cement and Concrete Research |
Volume | 35 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2005 |
MoE publication type | A1 Journal article-refereed |
Keywords
- mixture proportioning
- admixtures
- ash
- gasification