TY - JOUR
T1 - Upcycling sintering red mud waste for novel superfine composite mineral admixture and CO2 sequestration
AU - Liu, Songhui
AU - Shen, Yuanyuan
AU - Wang, Yuli
AU - Shen, Peiliang
AU - Xuan, Dongxing
AU - Guan, Xuemao
AU - Shi, Caijun
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China ( 52108208 , 51808196 ), the fellowship of China Postdoctoral Science Foundation ( 2020M682290 ), the Science and Technology Project of Henan Province ( 211110231400 , 212102310559 ), the National Key R&D Program Intergovernmental International Science and Technology Innovation Cooperation Project ( 2018YFE0107300 ), the Opening Project of State Key Laboratory of Green Building Materials ( 2021GBM06 ), the Henan Outstanding Foreign Scientists' Workroom ( GZS2021003 ), and the doctor foundation of Henan Polytechnic University ( B2020-11 ).
Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2022/5
Y1 - 2022/5
N2 - To utilize the sintering red mud waste（SRM）on a large scale and sequester CO2, a room temperature in-situ wet carbonation method was proposed for activation of SRM. The wet carbonation reaction process of SRM was investigated, and the evolution of phase composition, microstructure and pore structure during carbonation of the SRM was revealed by XRD, TG/DTG, FT-IR, NMR, SEM and nitrogen adsorption. Moreover, the feasibility of carbonated SRM (C-SRM) as a high value-added mineral admixture was explored. The results showed that the carbonation of SRM produced a large number of fine calcite crystals and silica-alumina gel with high polymerization. After 3 h of carbonation, the SRM achieved a CO2 sequestration rate of 15.3%, calcite (Cc) yield of 86.5% and Na+ leaching rate of 81.8%. The C-SRM possessed a high pozzolanic reactivity and fine particle size, showing its potential as a cement mineral admixture.
AB - To utilize the sintering red mud waste（SRM）on a large scale and sequester CO2, a room temperature in-situ wet carbonation method was proposed for activation of SRM. The wet carbonation reaction process of SRM was investigated, and the evolution of phase composition, microstructure and pore structure during carbonation of the SRM was revealed by XRD, TG/DTG, FT-IR, NMR, SEM and nitrogen adsorption. Moreover, the feasibility of carbonated SRM (C-SRM) as a high value-added mineral admixture was explored. The results showed that the carbonation of SRM produced a large number of fine calcite crystals and silica-alumina gel with high polymerization. After 3 h of carbonation, the SRM achieved a CO2 sequestration rate of 15.3%, calcite (Cc) yield of 86.5% and Na+ leaching rate of 81.8%. The C-SRM possessed a high pozzolanic reactivity and fine particle size, showing its potential as a cement mineral admixture.
KW - Calcite
KW - In-situ wet carbonation
KW - Microstructure
KW - Silica-alumina gel
KW - Sintering red mud (SRM)
UR - http://www.scopus.com/inward/record.url?scp=85126670941&partnerID=8YFLogxK
U2 - 10.1016/j.cemconcomp.2022.104497
DO - 10.1016/j.cemconcomp.2022.104497
M3 - Journal article
AN - SCOPUS:85126670941
SN - 0958-9465
VL - 129
JO - Cement and Concrete Composites
JF - Cement and Concrete Composites
M1 - 104497
ER -