再生微粉碳捕集材料研究现状  

Current research status of carbon capture material from recycled fine powder

作　　者：刘赟 曹万智[1,2] 刘东升 LIU Yun;CAO Wanzhi;LIU Dongsheng(College of Civil Engineering,Northwest University for Nationalities,Lanzhou 730124,China;Gansu Key Laboratory of New Building Materials and Building Energy Conservation,Lanzhou 730124,China)

机构地区：[1]西北民族大学土木工程学院,甘肃兰州730124 [2]甘肃省新型建材与建筑节能重点实验室,甘肃兰州730124

出　　处：《新型建筑材料》2024年第7期17-22,共6页New Building Materials

基　　金：中央高校双碳技术创新研究专项(31920240056);甘肃省教育厅:高校科研创新平台重大培育项目(2024CXPT-19);西北民族大学引进人才科研项目(xbmuyjrc2023019);中央高校基本科研业务费专项资金资助(31920240127)。

摘　　要：废弃混凝土经破碎、筛分后可以制成再生骨料进行回收利用,而附着在再生骨料上的废弃水泥石会对再生骨料的使用性能造成负面影响。由废弃水泥石制备的再生微粉主要由水化硅酸钙、氢氧化钙、钙矾石、未水化的水泥颗粒等物质组成,有孔隙率高、强度低和钙含量高等特点,能吸收空气中的CO_(2)通过化学反应的方式对CO_(2)固定。将其制备为一种碳捕集材料可以在提高废弃混凝土资源化利用率的同时捕集CO_(2)降低碳排放。从再生微粉碳化性能、碳化工艺、碳化机理3个方面对国内外学者的研究进展进行综述,以期为再生微粉的利用提供一定的参考。Waste concrete can be made into recycled aggregate for recycling after crushing and screening.The waste cement stone attached to the recycled aggregate will have a negative impact on the performance of the recycled aggregate.The recycled fine powder prepared from waste cement stone is mainly composed of hydrated calcium silicate,calcium hydroxide,ettringite,unhydrated cement particles and other substances.It also has the characteristics of high porosity,low strength,and high calcium content.It can absorb CO_(2) in the air and fix CO_(2) by chemical reaction.Preparing it as a carbon capture material can improve the resource utilization of waste concrete while capturing carbon dioxide and reducing carbon emissions.In this paper,the research progress of domestic and foreign scholars is reviewed from three aspects:carbonization performance,carbonization process and carbonization mechanism of recycled fine powder,in order to provide some reference for the utilization of recycled fine powder.

关 键 词：再生微粉 固碳 碳化工艺 碳化机理 

分 类 号：TU528.09[建筑科学—建筑技术科学]