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硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (6): 1897-1911.

所属专题: 水泥混凝土

• 水泥混凝土 •    下一篇

二氧化碳矿化养护水泥基材料研究进展

吴胜坤1,2, 黄天勇2, 谢岩1, 王展鹏1, 包琦1, 张敏1, 叶航1, 刘琦1   

  1. 1.中国石油大学(北京)非常规油气科学技术研究院,油气资源与探测国家重点实验室,北京 102249;
    2.北京建筑材料科学研究总院有限公司,固废资源化利用与节能建材国家重点实验室,北京 100041
  • 收稿日期:2023-04-10 修订日期:2023-04-10 出版日期:2023-06-15 发布日期:2023-06-25
  • 通信作者: 刘琦,博士,副教授。E-mail:liuqi@cup.edu.cn
  • 作者简介:吴胜坤(1998—),男,硕士研究生。主要从事低碳能源工程的研究。E-mail:2021211809@student.cup.edu.cn
  • 基金资助:
    内蒙古自治区科技重大专项(2021ZD0020); 中国石油大学(北京)校基金(ZX20200133); 北京市科技计划(Z221100007522002)

Review on CO2 Mineral Carbonation-Cured Cement-Based Materials

WU Shengkun1,2, HUANG Tianyong2, XIE Yan1, WANG Zhanpeng1, BAO Qi1, TIONG Michelle1, YE Hang1, LIU Qi1   

  1. 1. National State Key Laboratory of Petroleum Resources and Engineering, Unconventional Petroleum Research Institute, China University of Petroleum (Beijing), Beijing 102249, China;
    2. National Key Laboratory of Solid Waste Recycling and Energy Saving Building Material, Beijing Building Materials Academy of Sciences Research, Beijing 100041, China
  • Received:2023-04-10 Revised:2023-04-10 Online:2023-06-15 Published:2023-06-25

摘要: 为了减缓建筑行业生产过程中CO2排放对全球气候变化的影响,建筑行业提出了CO2矿化封存技术,即利用CO2与水泥基材料中的水泥熟料以及水泥水化产物等反应生成以方解石为主的碳酸钙(CaCO3)沉淀和无定形高聚合度硅胶(SiO2·nH2O)。CO2矿化养护水泥基材料在实现永久封存利用CO2的同时,因其矿化产物具有较好的稳定性、填充效应和成核效应,矿化养护后的水泥基材料力学强度得以提升,耐久性得到改善,相比其他养护方法,短时间内可以获得具有高性能的水泥基材料。本文总结了现阶段CO2矿化养护水泥基材料的最新研究进展,从反应机理和影响因素两方面进行了介绍,详细分析了预养护、相对湿度、水胶比、CO2浓度、养护压力和温度等养护条件对水泥基材料CO2矿化养护后性能、固碳率以及矿化程度的影响,并对CO2矿化技术在水泥基材料中未来的发展和研究方向进行了展望。

关键词: 二氧化碳封存与利用, 矿化养护, 水泥基材料, 反应机理, 影响因素

Abstract: CO2 mineralization curing is considered an effective approach to mitigate the impact of the construction industry on global climate change by reacting CO2 with cement-based materials (CBM) (e.g. cement clinker, namely tricalcium silicate, β-dicalcium silicate, tricalcium aluminate and its hydration products, namely calcium hydroxide, amorphous calcium silicate hydrates, hydrated aluminate and sulfate phases) to form calcium carbonate mainly composed of calcite and amorphous silica gel with high degree of polymerization, realizing the storage and utilization of CO2. Attributed to the good stability, filling effect and nucleation effect of the resultant products, the mechanical properties and durability of CBM are effectively improved while better performance is anticipated in a relatively short time compared with other curing technologies. In this paper, the reaction mechanisms and latest research progress of CO2 mineral carbonation-cured CBM are reviewed. The effect of influencing factors, such as pre-condition, relative humidity, water binder ratio, CO2 concentration, curing pressure and temperature on the post-mineralization properties, carbon fixation rate and mineralization degree are evaluated. Finally, based on the current research status and existing problems, suggestions and recommendations for a wider application of CO2 mineralization technology in the future are also provided.

Key words: carbon dioxide storage and utilization, mineral carbonation curing, cement-based material, reaction mechanism, influencing factor

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