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Title |
Pore Characteristics of Stainless Steel Slag AOD Blended Cement Pastes by Carbonation Curing
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Authors |
황철성(Chul-Sung Hwang) ; 박경태(Kyoung Tae Park) ; 최영철(Young Cheol Choi) |
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DOI |
https://doi.org/10.11112/jksmi.2018.22.3.090 |
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Keywords |
Stainless steel slag ; γ-C2S ; Carbonation ; Carbon-capture ; Binder ; CO2 uptake |
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Abstract |
Stainless steel slag, γ-C2S, Carbonation, Carbon-capture, Binder, CO2 uptake In this study, the mechanical and micro-structural change of cement pastes incorporating Stainless-Steel Slag Argon Oxygen Decarburization Slag (STS-A) containing γ-C2S as a carbon capture materials were investigated with carbonation curing condition. γ-C2S is non-hydraulic, therefore does not react with water. But γ-C2S has a reactivity under carbonation curing condition with water. The reaction products fill up the pore in pastes. The microstructure of STS-A blended cement pastes could be densified by this reaction. The pore structure of cement pastes incorporating STS-A was measured using mercury intrusion porosimetry (MIP) after carbonation curing (CO2 concentration is about 5%). Also the fractal characteristics were investigated for the effect of carbonation curing on the micro-structural change of paste specimens. From the results, the compressive strength of carbonated specimens incorporating STS-A increased and pore-structure of carbonated paste is more complicated.
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