| Citation: |
WU Guowei，FENG Guorui，BAI Jinwen，et al. Effect of CO2 pressure on carbon storage−mechanical properties of red mud−fly ash based grouting materials[J]. Coal Science and Technology，2025，53（6）：153−165. DOI: 10.12438/cst.2025-0334
|
The accumulation of solid waste and CO2 emissions are two critical issues hindering the clean and efficient development of the energy industry. The red mud-fly ash base polymer grouting material was prepared by Bayer red mud and fly ash, which are by products of aluminum industry. The carbonation depth, carbonation area, CO2 absorption, and uniaxial compressive strength of the materials under different CO2 curing pressures were tested. Microscopic characterization techniques such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope-energy dispersive spectrometry (SEM−EDS), and low-field nuclear magnetic resonance (LF−NMR) were employed to reveal the carbon sequestration-mechanical performance evolution mechanism of the grouting materials. The results indicated that as the CO2 curing pressure increased from 0.2 MPa to 1.8 MPa, the carbonation depth of the material increased from 2.07 mm to 4.27 mm, and the CO2 absorption rate rose from 1.10% to 2.86%. After carbonation curing, the contribution of carbonates to the material's strength was superior to that of sodium/calcium aluminosilicate hydrate (N(C)−A−S−H) gel, leading to an increase in the uniaxial compressive strength with higher CO2 pressure. When the curing pressure reached 1.4 MPa, the strength exceed that of the non-carbonated control group. During the continued curing process up to 28 days, the early carbonation reaction consumed free alkali as well as Ca2+ and Na+, which are essential for geopolymer formation, thereby restricting further geopolymerization. Additionally, the overall low-calcium system of the material hindered the sustained growth and development of calcium carbonate crystals. This ultimately led to an increase in material porosity, resulting in a deterioration of 28-day strength compared to the control group. This study provides a theoretical foundation for guiding the construction of CO2 storage reservoirs in goaf areas and underground carbon sequestration.
| [1] |
LIU G M,GAO R C,LIU F,et al. Analysis of CO2 storage efficiency and performance of low carbon cement binders containing carbide slag and phosphorus slag[J]. Journal of CO2 Utilization,2025,93:103037. doi: 10.1016/j.jcou.2025.103037
|
| [2] |
ZHANG R,WEN L J,JIN Y,et al. Synergistic impacts of carbon emission trading policy and innovative city pilot policy on urban land green use efficiency in China[J]. Sustainable Cities and Society,2025,118:105955. doi: 10.1016/j.scs.2024.105955
|
| [3] |
International Energy Agency. CO2 emissions in 2023[EB/OL]. [2024−05−20]. https://www.iea.org/reports/CO2-emissions-in-2023.
|
| [4] |
谢和平,张吉雄,高峰,等. 煤矿负碳高效充填开采理论与技术构想[J]. 煤炭学报,2024,49(1):36−46.
XIE Heping,ZHANG Jixiong,GAO Feng,et al. Theory and technical conception of carbon-negative and high-efficient backfill mining in coal mines[J]. Journal of China Coal Society,2024,49(1):36−46.
|
| [5] |
张吉雄,张强,周楠,等. 煤基固废充填开采技术研究进展与展望[J]. 煤炭学报,2022,47(12):4167−4181.
ZHANG Jixiong,ZHANG Qiang,ZHOU Nan,et al. Research progress and prospect of coal based solid waste backfilling mining technology[J]. Journal of China Coal Society,2022,47(12):4167−4181.
|
| [6] |
王双明,刘浪,朱梦博,等. “双碳” 目标下煤炭绿色低碳发展新思路[J]. 煤炭学报,2024,49(1):152−171.
WANG Shuangming,LIU Lang,ZHU Mengbo,et al. New way for green and low-carbon development of coal industry under the target of “daul-carbon”[J]. Journal of China Coal Society,2024,49(1):152−171.
|
| [7] |
冯国瑞,白锦文,曹光明,等. 残采区关键域充填储碳空间重构的科学内涵[J]. 中国矿业大学学报,2023,52(3):432−445.
FENG Guorui,BAI Jinwen,CAO Guangming,et al. Scientific connotation on the key location backfilling for carbon storage space reconstruction in the residual mining area[J]. Journal of China University of Mining & Technology,2023,52(3):432−445.
|
| [8] |
ZHANG R,ZHENG S L,MA S H,et al. Recovery of alumina and alkali in Bayer red mud by the formation of andradite-grossular hydrogarnet in hydrothermal process[J]. Journal of Hazardous Materials,2011,189(3):827−835. doi: 10.1016/j.jhazmat.2011.03.004
|
| [9] |
WU P F,LIU X M,ZHANG Z Q,et al. Properties of red mud-filled and modified resin composites[J]. Construction and Building Materials,2023,409:133984. doi: 10.1016/j.conbuildmat.2023.133984
|
| [10] |
LI S C,ZHANG J,LI Z F,et al. Feasibility study of red mud-blast furnace slag based geopolymeric grouting material:Effect of superplasticizers[J]. Construction and Building Materials,2021,267:120910. doi: 10.1016/j.conbuildmat.2020.120910
|
| [11] |
LI Y,LIU X M,LI Z P,et al. Preparation,characterization and application of red mud,fly ash and desulfurized gypsum based eco-friendly road base materials[J]. Journal of Cleaner Production,2021,284:124777. doi: 10.1016/j.jclepro.2020.124777
|
| [12] |
NIE Q K,HU W,HUANG B S,et al. Synergistic utilization of red mud for flue-gas desulfurization and fly ash-based geopolymer preparation[J]. Journal of Hazardous Materials,2019,369:503−511. doi: 10.1016/j.jhazmat.2019.02.059
|
| [13] |
郭冰冰,储嘉,王艳,等. 碳化养护混凝土生命周期环境影响的评估[J]. 材料导报,2024,38(24):111−120.
GUO Bingbing,CHU Jia,WANG Yan,et al. Life cycle assessment of environmental impacts of CO2-cured concrete[J]. Materials Reports,2024,38(24):111−120.
|
| [14] |
张瑞,杨大伟,吴科,等. CO2养护压力对植生混凝土碱度及力学性能的影响[J]. 硅酸盐通报,2023,42(10):3499−3507.
ZHANG Rui,YANG Dawei,WU Ke,et al. Effect of CO2 curing pressure on alkalinity and mechanical properties of vegetated concrete[J]. Bulletin of the Chinese Ceramic Society,2023,42(10):3499−3507.
|
| [15] |
禹凯峰. CO2浓度、压力对水泥基材料碳化机理及Cl-再分布的影响[D]. 深圳:深圳大学,2023.
YU Kaifeng. Effects of CO2 concentration and pressure on carbonation mechanism and Cl- redistribution of cement-based materials[D]. Shenzhen:Shenzhen University,2023.
|
| [16] |
兰燕,顾棋,彭宇,等. 不同CO2养护压力下硫铝酸盐和硅酸盐水泥浆体早期微观结构[J]. 浙江大学学报(工学版),2022,56(12):2454−2462.
LAN Yan,GU Qi,PENG Yu,et al. Microstructure of early-age calcium sulphoaluminate and ordinary Portland cement paste cured under different CO2 pressures[J]. Journal of Zhejiang University (Engineering Science),2022,56(12):2454−2462.
|
| [17] |
HU W,NIE Q K,HUANG B S,et al. Mechanical and microstructural characterization of geopolymers derived from red mud and fly ashes[J]. Journal of Cleaner Production,2018,186:799−806. doi: 10.1016/j.jclepro.2018.03.086
|
| [18] |
HOANG M D,DO Q M,LE V Q. Effect of curing regime on properties of red mud based alkali activated materials[J]. Construction and Building Materials,2020,259:119779. doi: 10.1016/j.conbuildmat.2020.119779
|
| [19] |
BELTRAME N A M,DIAS R L,WITZKE F B,et al. Effect of carbonation curing on the physical,mechanical,and microstructural properties of metakaolin-based geopolymer concrete[J]. Construction and Building Materials,2023,406:133403. doi: 10.1016/j.conbuildmat.2023.133403
|
| [20] |
ZHANG D,SHAO Y X. Early age carbonation curing for precast reinforced concretes[J]. Construction and Building Materials,2016,113:134−143. doi: 10.1016/j.conbuildmat.2016.03.048
|
| [21] |
NIU X H,FENG G R,HAN Y N,et al. Influence of premixed chlorine salt on the pore characteristics of cement-based hardened grout containing a large amount of bentonite[J]. Construction and Building Materials,2023,378:131183. doi: 10.1016/j.conbuildmat.2023.131183
|
| [22] |
CHEN Q S,ZHU L M,WANG Y M,et al. The carbon uptake and mechanical property of cemented paste backfill carbonation curing for low concentration of CO2[J]. Science of The Total Environment,2022,852:158516. doi: 10.1016/j.scitotenv.2022.158516
|
| [23] |
NIKULSHINA V,AYESA N,GÁLVEZ M E,et al. Feasibility of Na-based thermochemical cycles for the capture of CO2 from air:Thermodynamic and thermogravimetric analyses[J]. Chemical Engineering Journal,2008,140(1-3):62−70. doi: 10.1016/j.cej.2007.09.007
|
| [24] |
GAO Y H,LIU L,FANG Z Y,et al. A backfill material without cementitious material:Carbonation curing magnesium slag based full solid waste backfill material[J]. Journal of Central South University,2024,31(5):1507−1525. doi: 10.1007/s11771-024-5635-2
|
| [25] |
AHMED O,AHMAD S,ADEKUNLE S K. Carbon dioxide sequestration in cementitious materials:A review of techniques,material performance,and environmental impact[J]. Journal of CO2 Utilization,2024,83:102812. doi: 10.1016/j.jcou.2024.102812
|
| [26] |
ZHANG W Z,XIE G M,HU J J,et al. Hazardous wastes used as hybrid precursors for geopolymers:Cosolidification/stabilization of MSWI fly ash and Bayer red mud[J]. Chemical Engineering Journal,2023,474:145966. doi: 10.1016/j.cej.2023.145966
|
| [27] |
WANG T Y,NING X W,YANG L,et al. Electromagnetic wave absorption properties of red mud-blast furnace slag based geopolymers filled with various wave-absorption materials[J]. Construction and Building Materials,2023,404:133335. doi: 10.1016/j.conbuildmat.2023.133335
|
| [28] |
KALIYAVARADHAN S K,LING T C,MO K H. CO2 sequestration of fresh concrete slurry waste:Optimization of CO2 uptake and feasible use as a potential cement binder[J]. Journal of CO2 Utilization,2020,42:101330. doi: 10.1016/j.jcou.2020.101330
|
| [29] |
XUAN D X,ZHAN B J,POON C S,et al. Carbon dioxide sequestration of concrete slurry waste and its valorisation in construction products[J]. Construction and Building Materials,2016,113:664−672. doi: 10.1016/j.conbuildmat.2016.03.109
|
| [30] |
马璐璐,张翛,刘芳,等. 赤泥−粉煤灰稳定煤矸石基层强度特性及机理[J]. 建筑材料学报,2023,26(7):762−770. doi: 10.3969/j.issn.1007-9629.2023.07.009
MA Lulu,ZHANG Xiao,LIU Fang,et al. Strength characteristics and mechanism of red mud-fly ash stabilized coal gangue base[J]. Journal of Building Materials,2023,26(7):762−770. doi: 10.3969/j.issn.1007-9629.2023.07.009
|
| [31] |
ABOULAYT A,SOUAYFAN F,ROZIERE E,et al. Alkali-activated grouts based on slag-fly ash mixtures:From early-age characterization to long-term phase composition[J]. Construction and Building Materials,2020,260:120510. doi: 10.1016/j.conbuildmat.2020.120510
|
Supported by: Beijing Renhe Information Technology Co., Ltd. 
DownLoad: