含有消耗CO2吸收剂的混凝土:微观结构,强度和耐久性的全面评估
1Department of Highway & Transportation Research, Korea Institute of Civil Engineering and Building Technology, 283, Goyang-daero, Ilsanseo-gu, Goyang-si 10223, Republic of Korea.
Materials (Basel, Switzerland)
|February 13, 2026
概括
从水泥中直接捕获空气 (DAC) 中回收使用的二氧化碳 (CO2) 吸收物是可行的. 作为部分水替代品 (10-20%) 的最佳使用可以提高早期的强度,而不会影响长期的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 土木工程 土木工程是指土木工程.
背景情况:
- 从直接空气捕获 (DAC) 中消耗的二氧化碳吸收剂的可持续回收对于碳捕获技术至关重要.
- 研究使用废弃的性二氧化碳吸收剂作为在水泥材料中混合水的部分替代品.
研究的目的:
- 评估回收二氧化碳吸收物在水泥中的可行性.
- 评估对水泥材料微观结构,机械性能和耐久性的影响.
主要方法:
- 用0-40%的吸收替代剂制备砂和混凝土.
- 微观结构分析 (SEM,XRD,TGA). 微观结构分析 (SEM,XRD,TGA). 微观结构分析 (SEM,XRD,TGA). 微观结构分析 (SEM,XRD,TGA). 微观结构分析 (SEM,XRD,TGA). 微观结构分析 (SEM,XRD,TGA).
- 机械测试 (压力和屈曲强度).
- 耐久性评估 (冷解,耐酸性,碳化).
主要成果:
- 低的替代比率 (10-20%) 通过CaCO3微填充和核化增强了早期的强度.
- 在10-20%的替代剂中观察到可比的长期强度.
- 较高的比率 (≥30%) 导致有害影响:增加碳化,C-S-H脱,多孔性和强度降低.
结论:
- 消耗的二氧化碳吸收剂可以有效地回收到水泥材料中.
- 最佳的替代范围为10-20%的有益效果.
- 更高的替代水平会对水泥材料的性能产生负面影响.
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