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硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (6): 2063-2074.DOI: 10.16552/j.cnki.issn1001-1625.2025.1151

• 资源综合利用 • 上一篇    下一篇

碳化回收水泥混凝土粉末对泡沫混凝土性能的影响

何彦辉1,2(), 王欢3, 邹勇4, 陈诚4, 许芃3, 何智浩3,5,6()   

  1. 1.阿里地区交通运输局,阿里 859000
    2.陕西公路隧道博物馆,西安 710068
    3.西华大学应急管理学院,成都 610039
    4.陕西兴通监理咨询有限公司,西安 710061
    5.四川省重大危险源监测与控制重点实验室,成都 610046
    6.电子科技大学资源与环境学院,成都 611731
  • 收稿日期:2025-11-18 修订日期:2025-12-13 出版日期:2026-06-15 发布日期:2026-07-14
  • 通信作者: 何智浩,博士,副教授。E-mail:zzzzhangjj@163.com
  • 作者简介:何彦辉(1981—),男,高级工程师。主要从事交通工程施工技术及管理、安全与应急救援方面的研究。E-mail:18080584376@163.com
  • 基金资助:
    国家自然科学基金(52408440);地质灾害防治与地质环境保护国家重点实验室开放基金(SKLGP2023K006);57号改建工程科研项目(HCZB-AL-2024002);重大危险源测控四川省重点实验室开放课题(KFKT2023-04);成都市揭榜挂帅应急类项目(2024-JB00-00006-SN)

Influence of Carbonized Recycled Cement Concrete Powder on Performance of Foamed Concrete

HE Yanhui1,2(), WANG Huan3, ZOU Yong4, CHEN Cheng4, XU Peng3, HE Zhihao3,5,6()   

  1. 1.Ali Prefecture Transportation Bureau,Ali,859000,China
    2.Shaanxi Highway Tunnel Museum,Xi’an 710068,China
    3.School of Emergency Management,Xihua University,Chengdu 610039,China
    4.Shaanxi Xingtong Supervision and Consulting Co.,Ltd.,Xi’an 710061,China
    5.Sichuan Provincial Key Laboratory of Major Hazard Source Monitoring and Control,Chengdu 610046,China
    6.School of Resources and Environment,University of Electronic Science and Technology of China,Chengdu 611731,China
  • Received:2025-11-18 Revised:2025-12-13 Published:2026-06-15 Online:2026-07-14

摘要:

在“双碳”目标背景下,水泥工业的高能耗和高排放问题亟待解决,建筑固废的资源化利用成为低碳建材发展的重要途径。本研究采用普通硅酸盐水泥为基体,通过加速碳化处理制得回收水泥混凝土粉末(RCCP)和碳化回收水泥混凝土粉末(碳化RCCP),并分别以0%、20%、40%、60%(质量分数)替代水泥,制备泡沫混凝土。通过流动性、干密度、吸水率、抗压强度、XRD、TG-DSC、SEM、MicroCT及导热系数测试,分析了碳化RCCP对泡沫混凝土工作性、显微结构及热学性能的影响。结果表明:随着RCCP替代率增加,浆体流动性下降,当替代率为60%时,碳化与未碳化试样的流动度分别较基准样下降约8.0%与11.0%;随着碳化RCCP替代率增加,试样抗压强度先增大后减小,当替代率为20%时,28 d抗压强度达到峰值,比RCCP试样提高6.3%;随着RCCP替代率增加,孔隙率增大,导热性能有所改善,当碳化RCCP替代率为60%时,导热系数较RCCP试样降低6.8%。

关键词: 泡沫混凝土, 回收水泥混凝土粉末, 碳化, 力学性能, 保温性能

Abstract:

Under the background of the “double carbon” target, the high energy consumption and high emission problems of the cement industry need to be solved urgently. The resource utilization of construction solid waste has become an important way for the development of low-carbon building materials. In this study, ordinary Portland cement was used as the matrix, and recycled cement concrete powder (RCCP) and carbonated recycled cement concrete powder (carbonated RCCP) were prepared by accelerated carbonation treatment. Foamed concrete was prepared by replacing cement with 0%, 20%, 40% and 60% (mass fraction) RCCP and carbonated RCCP respectively. The effect of carbonated RCCP on the workability, microstructure and thermal properties of foamed concrete was analyzed by fluidity, dry density, water absorption rate, compressive strength, XRD, TG-DSC, SEM, microCT and thermal conductivity coefficient tests. The results show that with the increase of RCCP substitution rate, the fluidity of slurry decreases. When the substitution rate is 60%, the fluidity of carbonated and uncarbonated samples decreases by about 8.0% and 11.0% respectively compared with the reference sample. With the increase of the substitution rate of carbonated RCCP, the compressive strength of sample increases first and then decreases. When the substitution rate is 20%, the 28 d compressive strength reaches the peak value, which is 6.3% higher than that of RCCP sample. With the increase of RCCP substitution rate, the porosity increases, the thermal conductivity performance is improved. When the substitution rate of carbonated RCCP is 60%, the thermal conductivity is 6.8% lower than that of RCCP sample.

Key words: foamed concrete, recycled cement concrete powder, carbonation, mechanical property, thermal insulation property

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