细度和水胶比对精炼钢渣负碳胶结料碳矿化性能的影响

doi:10.16552/j.cnki.issn1001-1625.2024.1628

硅酸盐通报 ›› 2025, Vol. 44 ›› Issue (7): 2549-2556.DOI: 10.16552/j.cnki.issn1001-1625.2024.1628

细度和水胶比对精炼钢渣负碳胶结料碳矿化性能的影响

向玮衡^1,2, 刘俊^2,3, 胡成^1,3, 陈平^1,3,4, 马晓鹏^2,3, 彭莹杰^2,4

1.桂林理工大学,广西绿色建材与建筑工业化重点实验室,桂林 541004;
2.桂林理工大学,土木工程学院,桂林 541004;
3.桂林理工大学,广西工业废渣建材资源利用工程技术研究中心,桂林 541004;
4.桂林理工大学,有色金属矿产勘查与资源高效利用省部共建协同创新中心,桂林 541004

收稿日期:2024-12-30 修订日期:2025-02-19 出版日期:2025-07-15 发布日期:2025-07-24
通信作者: 胡成,博士,副研究员。E-mail:hucheng0402@wust.edu.cn
作者简介:向玮衡(1989—),女,博士,副研究员。主要从事低碳胶凝材料、高性能水泥基材料等的研究。E-mail:XWH891116@163.com
基金资助:
广西科技重大专项(桂科AA23023017);广西青年科学基金(2023GXNSFBA026130);国家自然科学基金(52368029,52468032)

Effects of Fineness and Water-Binder Ratio on Carbon Mineralization Performance of Ladle Furnace Slag Carbon-Negative Binder

XIANG Weiheng^1,2, LIU Jun^2,3, HU Cheng^1,3, CHEN Ping^1,3,4, MA Xiaopeng^2,3, PENG Yingjie^2,4

1. Guangxi Key Laboratory of Green Building Materials and Construction Industrialization, Guilin University of Technology, Guilin 541004, China;
2. College of Civil Engineering, Guilin University of Technology, Guilin 541004, China;
3. Guangxi Engineering and Technology Center for Utilization of Industrial Waste Residue in Building Materials, Guilin University of Technology, Guilin 541004, China;
4. Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources, Guilin University of Technology, Guilin 541004, China

Received:2024-12-30 Revised:2025-02-19 Published:2025-07-15 Online:2025-07-24

摘要/Abstract

摘要： 精炼钢渣的低水化活性限制了其作为胶凝材料的应用。本文研究了不同细度和水胶比对精炼钢渣碳化活性,以及碳化试样抗压强度、物相组成和微观形貌的影响。结果表明,在细度为777.8 m²/kg和水胶比为0.100的条件下,精炼钢渣的CO₂吸收量和碳化程度分别为17.16%和39.60%,碳化试样的抗压强度为213.03 MPa。精炼钢渣碳化活性随着细度的提高有显著提升,但当细度超过642.6 m²/kg后没有明显提升;且细度的提高会使碳化反应生成的方解石结晶度有所降低,但碳化产物的总量得到大幅提高,总体上有利于抗压强度的提高。随着水胶比的不断提高,精炼钢渣的碳化活性和碳化试样的抗压强度都呈先上升后下降的趋势;且在0.100的水胶比下碳化反应生成的方解石数量更多、晶体尺寸更大且结晶度更好。

关键词: 精炼钢渣, 负碳胶结料, 碳矿化性能, 细度, 水胶比

Abstract: The low hydraulic activity of ladle furnace slag (LFS) is the limitation of utilization as the cementitious material. This study researched the effects of different fineness and water-binder ratios on carbonation activity of LFS and the compressive strength, mineral phase composition, and microstructure of carbonated samples. The results show that the CO₂ uptake and degree of carbonation is 17.16% and 39.6% respectively, and the compressive strength of carbonated samples is 213.03 MPa at a fineness of 777.8 m²/kg and a water-binder ratio of 0.100. The carbonation activity of LFS is significantly enhanced with the increase of fineness, but there is not an obvious increase when the fineness exceeds 642.6 m²/kg. And the increase of fineness results in a reduce of crystallinity of calcite generated by carbonation reaction, but promotes a considerable generation of carbonation products, which contributes to the improvement of compressive strength. With the increase of water-binder ratio, the carbonation activity of LFS and the compressive strength of carbonated samples are both foremost increased and then decreased. And at a water-binder ratio of 0.100, the amount of calcite generated in carbonation reaction is more, the crystal size of calcite is larger and the crystallinity of calcite is better.

Key words: ladle furnace slag, carbon-negative binder, carbon mineralization performance, fineness, water-binder ratio

中图分类号:

TU521

向玮衡, 刘俊, 胡成, 陈平, 马晓鹏, 彭莹杰. 细度和水胶比对精炼钢渣负碳胶结料碳矿化性能的影响[J]. 硅酸盐通报, 2025, 44(7): 2549-2556.

XIANG Weiheng, LIU Jun, HU Cheng, CHEN Ping, MA Xiaopeng, PENG Yingjie. Effects of Fineness and Water-Binder Ratio on Carbon Mineralization Performance of Ladle Furnace Slag Carbon-Negative Binder[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(7): 2549-2556.

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细度和水胶比对精炼钢渣负碳胶结料碳矿化性能的影响

Effects of Fineness and Water-Binder Ratio on Carbon Mineralization Performance of Ladle Furnace Slag Carbon-Negative Binder

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