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硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (5): 1663-1670.DOI: 10.16552/j.cnki.issn1001-1625.2025.0965

• 资源综合利用 • 上一篇    下一篇

不同材料组成与养护工艺下钢渣基泡沫混凝土的固碳性能研究

汤小松1,2(), 宋秋磊1,2(), 骆静静1,2, 张程1,2, 张宇洋1,2   

  1. 1.苏州混凝土水泥制品研究院有限公司,苏州 215004
    2.江苏省高耐久混凝土工程技术研究中心,苏州 215004
  • 收稿日期:2025-09-30 修订日期:2026-01-04 出版日期:2026-05-15 发布日期:2026-06-10
  • 作者简介:汤小松(1998—),男,助理工程师。主要从事固废资源化利用方面的研究。E-mail:18380305332@163.com
    宋秋磊,博士,高级工程师。Email:songql0528@163.com
  • 基金资助:
    国家重点研发计划项目(2022YFC3803105);苏州市面向全球“揭榜挂帅”关键核心技术攻关项目(SZJB202505)

Carbon Sequestration Performance of Steel Slag-Based Foamed Concrete under Different Material Compositions and Curing Processes

TANG Xiaosong1,2(), SONG Qiulei1,2(), LUO Jingjing1,2, ZHANG Cheng1,2, ZHANG Yuyang1,2   

  1. 1.Suzhou Concrete and Cement Products Research Institute Co.,Ltd.,Suzhou 215004,China
    2.Jiangsu Engineering or Technology Research Center of High Durable Concrete,Suzhou 215004,China
  • Received:2025-09-30 Revised:2026-01-04 Published:2026-05-15 Online:2026-06-10

摘要:

为明确钢渣基泡沫混凝土(SSFC)的固碳性能与力学性能调控规律,拓展钢渣资源化利用路径及新型固碳建筑材料的研发方向,本文研究了钢渣掺量、碳化时间和碳化压力对钢渣基泡沫混凝土的CO2吸收率和抗压强度的影响,并提出了通过预养护和早强剂协同提升钢渣基泡沫混凝土固碳性能的技术途径。结果表明:随着钢渣掺量提升、碳化时间延长和碳化压力增大,SSFC的CO2吸收率逐渐增大,抗压强度随着钢渣掺量增加先增大后减小(当钢渣掺量为70%(质量分数)时达到峰值),且抗压强度随着碳化时间延长而增大。此外,预养护与早强剂的协同作用能显著提升钢渣基泡沫混凝土的固碳性能,其中,当钢渣掺量为70%时,Li2CO3掺量为0.4%(质量分数)并标准养护5 d后,于0.3 MPa压力下碳化24 h,SSFC的CO2吸收率可达到13.0%,抗压强度为6.9 MPa。该研究为新型固碳泡沫混凝土的研发提供了新思路。

关键词: 钢渣, 泡沫混凝土, 碳化养护, CO2吸收率, 抗压强度

Abstract:

To elucidate the regulatory mechanisms governing the carbon sequestration performance and mechanical properties of steel slag-based foamed concrete (SSFC), and to explore innovative pathways for the resource utilization of steel slag as well as the development of novel carbon-sequestering building materials, this study investigates the effects of steel slag content, carbonation time, and carbonation pressure on the CO2 absorption rate and compressive strength of SSFC, and proposes a technical approach to enhance its carbon sequestration performance through of SSFC the synergistic use of pre-curing and an early-strength agent.The results indicate that increasing steel slag content, prolonging carbonation time, and elevating carbonation pressure progressively enhance the CO2 absorption rate of SSFC. The compressive strength initially increases and subsequently decreases with higher steel slag content (peaking at 70% steel slag content by mass fraction), and the compressive strength increases with the increase of carbonation time. Moreover, the synergistic effect of pre-curing and early-strength agents significantly improves carbon sequestration performance of SSFC. Under optimal conditions (70% steel slag content, 0.4% Li2CO3 content (mass fraction), 5 d standard curing, and 0.3 MPa pressure for 24 h carbonation), SSFC achieves a 13.0% CO2 absorption rate with 6.9 MPa compressive strength, this study provides novel insights for developing next-generation carbon-sequestering foamed concrete.

Key words: steel slag, foamed concrete, carbonation curing, CO2 absorption rate, compressive strength

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