Abstract
The purpose of this study was to reuse desulfurization (De-S) slag in the production of autoclaved aerated concrete (AAC). The non-magnetic fraction of De-S slag is rich in calcium and silicon compounds, and therefore suitable to be an alternative raw material for AAC production. The calcium compounds in the De-S slag used in this study were Ca(OH)2, CaCO3, γ-Ca2SiO4, and CaF2 rather than CaO, and they affected the foaming of AAC mortars due to the insufficient alkalinity. Using 0.17 M NaOH(aq) to replace water or calcining the De-S slag in advance both improved the foaming of mortars, and thus obtained AAC products with stable properties. The formation and morphology of tobermorite in AAC were altered by the addition of De-S slag, probably due to the foreign ions introduced by the slag. The changes in tobermorite should also be related to the decline in the compressive strength of AAC specimens.
| Original language | English |
|---|---|
| Pages (from-to) | 132-140 |
| Number of pages | 9 |
| Journal | Construction and Building Materials |
| Volume | 158 |
| DOIs | |
| Publication status | Published - 2018 Jan 15 |
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All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
- Building and Construction
- Materials Science(all)
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Recycling of desulfurization slag for the production of autoclaved aerated concrete. / Chen, Ying Liang; Ko, Ming Sheng; Chang, Juu-En; Lin, Chun Ta.
In: Construction and Building Materials, Vol. 158, 15.01.2018, p. 132-140.Research output: Contribution to journal › Article
TY - JOUR
T1 - Recycling of desulfurization slag for the production of autoclaved aerated concrete
AU - Chen, Ying Liang
AU - Ko, Ming Sheng
AU - Chang, Juu-En
AU - Lin, Chun Ta
PY - 2018/1/15
Y1 - 2018/1/15
N2 - The purpose of this study was to reuse desulfurization (De-S) slag in the production of autoclaved aerated concrete (AAC). The non-magnetic fraction of De-S slag is rich in calcium and silicon compounds, and therefore suitable to be an alternative raw material for AAC production. The calcium compounds in the De-S slag used in this study were Ca(OH)2, CaCO3, γ-Ca2SiO4, and CaF2 rather than CaO, and they affected the foaming of AAC mortars due to the insufficient alkalinity. Using 0.17 M NaOH(aq) to replace water or calcining the De-S slag in advance both improved the foaming of mortars, and thus obtained AAC products with stable properties. The formation and morphology of tobermorite in AAC were altered by the addition of De-S slag, probably due to the foreign ions introduced by the slag. The changes in tobermorite should also be related to the decline in the compressive strength of AAC specimens.
AB - The purpose of this study was to reuse desulfurization (De-S) slag in the production of autoclaved aerated concrete (AAC). The non-magnetic fraction of De-S slag is rich in calcium and silicon compounds, and therefore suitable to be an alternative raw material for AAC production. The calcium compounds in the De-S slag used in this study were Ca(OH)2, CaCO3, γ-Ca2SiO4, and CaF2 rather than CaO, and they affected the foaming of AAC mortars due to the insufficient alkalinity. Using 0.17 M NaOH(aq) to replace water or calcining the De-S slag in advance both improved the foaming of mortars, and thus obtained AAC products with stable properties. The formation and morphology of tobermorite in AAC were altered by the addition of De-S slag, probably due to the foreign ions introduced by the slag. The changes in tobermorite should also be related to the decline in the compressive strength of AAC specimens.
UR - http://www.scopus.com/inward/record.url?scp=85030865162&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85030865162&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2017.09.195
DO - 10.1016/j.conbuildmat.2017.09.195
M3 - Article
VL - 158
SP - 132
EP - 140
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
ER -