| 摘要: |
| 从全球碳中和与可持续混凝土发展角度阐述了低碳混凝土的基本概念及全生命周期的减碳与碳汇核心技术理念.从原材料、混凝土设计、制备、施工、服役及再生利用等全生命周期过程提出了低碳混凝土的三大技术途径——直接减碳、间接减碳及碳汇技术，并分析了每个技术途径下的具体减碳技术路线.综述了混凝土的碳排放评价方法和准则，阐释了混凝土碳排放的生命周期评价方法.提出了低碳混凝土未来的重点研究方向——开发新型胶凝材料以及碳汇技术. |
| 关键词: 混凝土 可持续 低碳 碳汇 碳足迹 全生命周期 |
| DOI：10.3969/j.issn.1007-9629.2023.11.001 |
| 分类号:TU528.1 |
| 基金项目:国家自然科学基金资助项目（U22B2076， 51878480， 52078369， 52102027， 22M712396）；“十四五”国家重点研发计划项目（2022YFC3803104）；2021年产业技术基础公共服务平台项目（2021-H029-1-1）；上海市优秀学术带头人计划项目（22XD1403300）；中央高校基本科研业务费专项资金资助 |
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| Technical Principles and Approaches for Low Carbon Concrete |
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JIANG Zhengwu1,2, GAO Wenbin1,2, YANG Qiao1,2, LI Chen1,2, REN Qiang1,2
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1.Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education， Tongji University， Shanghai 201804， China;2.School of Materials Science and Engineering， Tongji University， Shanghai 201804， China
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| Abstract: |
| From the perspective of global carbon neutrality and sustainable concrete development， the basic concept and the core technical principles of low-carbon concrete in the whole life cycle were stated. Three technical approaches for low-carbon concrete，including direct carbon reduction， indirect carbon reduction and carbon sink technology， were proposed in terms of raw materials， concrete design， preparation， construction， service and recycling throughout its whole life cycle. The specific routes of carbon reduction technology under each technology pathway were analyzed. The evaluation methods and criteria for carbon emissions of concrete were reviewed. Meanwhile， the life cycle assessment of carbon emission of concrete was explained. The key research directions of low-carbon concrete in the future were proposed，focusing on the development of new cementitious materials and carbon sink technology. |
| Key words: concrete sustainable low carbon carbon sink carbon footprint life cycle |
